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The 2011 Jeep Grand Cherokee
Thanks to Jeremy White for the interviews, and to Jim Choate for getting the photos up so early.
The Grand Cherokee is due for launch in September 2010 (delayed from July 2010); pilots were built in late 2008 for crash testing, ride/handling tests, and HVAC refinement. The final production-intent vehicle was built in January 2009.
Ralph Gilles said that the platform was co-developed with Mercedes (as opposed to being an adaption of the ML as Jim Press implied); the body structure is stiffer than the Mercedes ML.
An Alfa Romeo-based Grand Cherokee has been all but confirmed; below is an artist’s representation of how hit may appear. The Alfa might only be sold in export markets, where Fiat and Alfa Romeo are mainstream brands with heavy dealer, service, and parts support; or it might be sold in the US as well, adding an “import brand” stamp to those who positively will not buy an American vehicle. An extended version, dubbed the Dodge Durango, was also planned; this would go beyond the old Commander idea and provide minivan-like interior space.
Personal impressions (Jeremy White)
The exterior is very nice; the sculpting is dramatic yet smooth. Ralph Gilles told me they are almost at the "tear point of the metal and the sculpting could not be made deeper without other design compromises. The power liftgate is a new design, seemingly hidden within the rod covering.
The interior is very comfortable with just about all surfaces “soft touch” and good faux wood trim abounds. The control stack aluminum-look plastic is the only part that doesn't seem top notch, but it is still good quality. Interior panel gaps are tight and controls felt good. The air lift suspension was nice and the sunroof is huge. The dash and seats and instruments are well laid out and ergonomic. The two tone interior on display (Brown/Charcoal) has a nice contrast and color and the leather is very soft. Some of the dash seems to be leather and has stitching similar to the Ram. Back seat room is better than current Grand Cherokee and far better than the Commander.
Direct injection was left out of the V6 — an engineer explained that it caused more roughness and noise than was desirable on a luxury vehicle, and that the benefits did not merit using it at this time. It appears that three rows of seats will only be seen on the Durango version, which might be longer.
Features
The new 2011 Jeep Grand Cherokee will deliver better on-road performance and, despite having more power, up to 11% better gas mileage from its Pentastar V6. The new Quadra-Lift air suspension system with the Selec-Terrain system allows the driver to choose the drive system that best matches on- or off-road driving conditions (or go with “automatic”).
2011 Jeep Grand Cherokee powertrains: the flight of the Phoenix arrives
The base engine is a flexible-fuel 3.6-liter V-6 engine pumping out 280 horsepower (209 kW) and 260 lb.-ft. of torque (353 N•m) @ 4,800 rpm — an improvement of 70 hp and 25 lb-ft over the current 3.7 liter V6. Despite that, and a heavier vehicle (4,470 lb vs 4,261 lb), gas mileage should be 11% higher.
The 3.6-liter V-6 engine is a completely new, state of the art design with dual overhead camshafts (DOHC) and a high-pressure die-cast aluminum cylinder block with variable-valve timing (VVT). Gas mileage is better than the Toyota 4Runner and similar to the less off-road-worthy Honda Pilot.
The Phoenix V6 comes with the Mercedes W5A580 five-speed automatic, which has adaptive electronic control or Electronic Range Select (ERS) driver-interactive manual control. The gas tank has been increased to a 24.6 gallon capacity, which allows for a range of around 500 miles.
Pentastar V6 Hemi V8 Pilot 4Runner Explorer TrailBlazer ML450 Hybrid 2WD 16/23 14/20 17/23 16/21 14/20 14/20 (22 combined) AWD 16/22 13/19 16/22 16/20 13/19 14/20 n/a The optional Hemi V8 engine now delivers 360 horsepower (268 kW) and 390 lb.-ft. of torque (520 N•m) @ 4,250 rpm; it uses cylinder deactivation and variable valve timing to increase mileage. The Hemi is coupled to the reliable, smooth Chrysler-designed 545RFE five-speed automatic transmission, which has a sixth forward speed for highway kickdown. The premium Overland 4x4 weighs around 5,210 lb, an increase of 320 lb over the 2008 Overland.
2011 Jeep Grand Cherokee’s trailer towing capability is up to 7,400 pounds on rear wheel drive models equipped with the HEMI V-8 engine.
As in the past, the 2011 Jeep Grand Cherokee will be available in left- and right-hand drive with either diesel or petrol powertrains for international sale.
Quadra-Lift and Selec-Terrain™
The Quadra-Lift system features five height settings for optimum ride performance:
The new Selec-Terrain™ traction control system lets customers choose the off-road setting; it electronically coordinates up to 12 different powertrain, braking and suspension systems, including throttle control, transmission shift, transfer case, Traction Control and Electronic Stability Control (ESC). The control dial allows the driver to choose from five driving conditions:
The new independent front and rear suspension features isolated front and rear suspension cradles. Variable-rate rear springs deliver improved on-road handling and comfort that complements the vehicle’s off-road capability. The new rear suspension allows the spare tire to be stored inside the vehicle as opposed to underneath.
Quadra Trac I delivers full-time four-wheel drive without any switches or levers to pull. The system provides smooth operation over a variety of road conditions. This light-weight single-speed case is both proven and highly efficient for enhanced fuel economy.
Quadra Trac II’s two-speed transfer case uses sensors to determine tire slip and take corrective action. The system uses Throttle Anticipate to sense quick movement in the throttle from a stop and maximizes traction before slippage occurs. When tire slippage is detected, as much as 100% of available torque is instantly routed to the axle with the most traction. Selec-Terrain is standard with Quadra Trac II and Quadra Drive II.
Quadra Drive II, with a rear Electronic Limited-Slip Differential (ELSD), delivers industry-leading tractive capability. The system instantly detects tire slip and smoothly distributes engine torque to tires with traction. In some cases, the vehicle will anticipate low traction and adjust in order to proactively limit or eliminate slip. Selec-Terrain is standard with Quadra Trac II and Quadra Drive II.
All 2011 Jeep Grand Cherokees equipped with either the off-road or the Quadra-Lift group are Trail Rated®. The Jeep Trail Rated badge on the 2011 Jeep Grand Cherokee indicates that the vehicle has been designed to perform in a variety of challenging off-road conditions identified by five key consumer-oriented performance categories: traction, ground clearance, maneuverability, articulation and water fording.
Jeep Trail Rated is a unique methodology used by Jeep Engineering to measure and predict off-road performance for all Jeep vehicles. Through a combination of natural and controlled field tests, Jeep Trail Rated provides a consistent measurement of off-road performance for all Jeep vehicles. Only Jeep vehicles are Trail Rated.
Body and chassis
The 2011 Jeep Grand Cherokee’s ruggedness is achieved with more than 5,400 welds in the body alone. Torsional stiffness is 146% more than the current Grand Cherokee and is stiffer than the BMW X5 and Toyota Highlander for improved durability and reduced noise, vibration, and harshness. With more than 3,700 mm of arc welding and 100 m of structural adhesive to augment welding, this marks a 53% increase in spot welds, a 42% increase in arc welds, and a 38% increase in structural adhesive.
The new interior now features rich materials and elegant appointments, as well as more room for both passengers and cargo. An optional CommandView® dual-pane sun roof provides twice as much glass surface than a standard sun roof and extends from the windshield to the rear of the vehicle. The front panel may be opened rearward, providing additional light and fresh air to first-row passengers. The rear panel, which is fixed, allows light and open viewing for second-row passengers and comes standard with a power sun shade.
The vehicle’s 114.8-inch wheelbase is 5.3 inches longer, but overall length is just 1.8 inches longer; coupled with three inches more width, the the size changes should improve cornering as well as interior space. Larger front door openings (1.9 inches wider; 2 inches higher) and rear doors that open 78° (vs. the old model’s 67 degrees) provide better access to the interior.
Inside, premium seating includes room for five passengers. An available fold-flat front-passenger seat provides improved cargo storage room (Laredo models). Rear seats recline 12° and move forward 12° for 24° of variation.
The cargo bay behind the rear seats has 6.8 more cubic feet of room (36.3 cubic feet total), and includes a storage unit with a rechargeable flashlight and new grocery hooks on both sides. The spare tire compartment includes removable dual storage bins for secure storage of muddy gear or other items. A new power rear liftgate is available.
Quality features
Engineers will conduct approximately 7.5 million customer-equivalent miles for durability and reliability testing of the all-new 2011 Jeep Grand Cherokee. Testing and validation in various climates include road trips to a variety of locations including Yucca, Arizona, Baudette, Minn. and Morgantown, West Virginia. A full battery of lab testing will include full-frame fatigue testing, door-slam testing and a road-test simulator.
The 2011 Jeep Grand Cherokee has gone through more than 244 hours of wind noise and aerodynamic evaluations in Chrysler LLC’s state-of-the-art aerodynamic and acoustic test facility in Auburn Hills, Mich.
Reliability and quality were achieved through extensive validation testing in developing the Jeep Grand Cherokee’s all-new 3.6-liter V-6 engine. More than 3.3 million customer-equivalent miles were recorded on engine dynamometers prior to production. Severity testing was increased 50% versus previous Chrysler V-6 engines — which have generally had strong durability — to accommodate high-load applications including trailer-towing.
The reduction of noise, vibration and harshness (NVH) was a key objective for every component during the design phase of the engine and was achieved by utilizing an advanced computer-aided engineering technique.
The use of a Quality Assurance Fixture (QAF) assures a high level of compliance at the start of production. The QAF allows engineers to look at the interior of the vehicle on a “simulated perfect body” which is a milled aluminum shell where all attachment points are matched exactly to CATIA modeling earlier in the program. This allows changes and design improvements earlier in the manufacturing process.
The company also employs techniques of Design for Six Sigma (DFSS), which is folding in "voice of the customer" data along with lessons learned to ensure that every vehicle is of the highest quality. The 2011 Jeep Grand Cherokee is the first new vehicle to have more than 100 DFSS projects.
Exterior design and 2011 Jeep Grand Cherokee aerodynamics
Every surface of the all-new Jeep Grand Cherokee is new and has been treated for aerodynamics, improving drag by 7% and resulting in a cD of 0.37, down from 0.404.
The removable lower front fascia delivers improved fuel economy, on-road performance and off-road capability. The lower front fascia features a large chromed appliqué (Limited and Overland models) that showcases available tow hooks.
Black appliqués on B-pillars give the day-light opening (DLO) an aerodynamic, modern appearance and a sleek profile. Optional chromed mirrors and door handles add to the profile and complement the full-chromed DLO surround on all models.
Taillamps wrap from the rear quarter panel to the back of the vehicle and create a solid form which achieves more of an upscale appearance. The treatment complements the front-end design and resonates with the rest of the exterior.
Seventeen-inch wheels are standard, with optional 18-inch and new-to-Jeep 20-inch wheels for 2011.
Jeep Grand Cherokee models equipped with a HEMI V-8 engine have 3.5-inch dual chromed exhaust tips, and those with the V-6 engine have a 3-inch single exhaust.
Safety and security
Standard safety features include Electronic Stability Control (ESC), Electronic Roll Mitigation (ERM), four-wheel Anti-lock Brake System (ABS) with rough-road detection, four-wheel Brake Traction Control System (BTCS), Passive Entry/Keyless Go, Remote keyless entry, express up/down windows for driver and front-seat passenger, seat-belt pretensioners, Trailer-Sway Control and Remote-Start which is standard on Overland and available on Limited.
Other standard safety features include full-length side-curtain air bags which extend protection to front and rear outboard passengers, seat-mounted side thorax air bags that enhance protection for the driver and front passenger and active head restraints which deploy in the event of a rear collision. The body structure is all new and designed to achieve expected safety performance in global markets (new roof-crush standards, side-impact standards and Euro pedestrian impact).
2011 Jeep Grand Cherokee connectivity and infotainment
The 2011 Jeep Grand Cherokee will feature uconnect guardian as a standard feature on all models (services provided by Hughes Telematics). uconnect guardian provides customers with the five most requested security features:
Manufacturing
The 2011 Jeep Grand Cherokee will be built at the 2.7-million-square-foot Jefferson North Assembly Plant (JNAP) in Detroit, which has been the site of Grand Cherokee production since its introduction in 1992. Jefferson North Assembly is undergoing a 285,000-square-foot expansion to replace the existing body shop; changes throughout paint and assembly operations will give the facility a new level of manufacturing flexibility for multiple product capability.
2011 Jeep Grand Cherokee preliminary specifications
All dimensions are measured at curb weight with standard tires and wheels. Information shown is correct at time of publication, and is subject to change without notice.
Construction Steel un 3.6 liter engine Standard on all models. 16 mpg city, 22 mpg (AWD) or 23 mpg (RWD) highway.
Regular 87 octane fuel. See the Phoenix Engines page for specifications. Transmission (V8) Mercedes five-speed automatic Details Adaptive electronic control or Electronic Range Select (ERS) driver-interactive manual control and electronically modulated torque converter clutch Gearing 3.59, 2.19, 1.41, 1.0, 0.83:1; Reverse, 3.16:1; Final Drive, 3.06:1; OTGR, 2.54:1 5.7 liter Hemi V8 Optional on Laredo, Limited, and Overland.
360 hp (268 kW) @ 5,150 rpm; 390 lb-ft (520 Nm) @ 4,250 rpm.
5,800 rpm redline; 89 octane fuel required. Rated at 14/20 mpg 2WD, 13/19 4WD. Transmission (V6) Mopar 545RFE automatic. 545RFE details Three planetary gear sets, one overrunning clutch, with Electronic Range Select (ERS) driver interactive control, electronically controlled torque converter clutch Gear ratios 3.0, 1.67, 1.0, 0.75, 0.67:1; Reverse, 3.0:1; Final Drive, 3.47:1; OTGR, 2.32:1; kickdown. 1.50:1 MP 3010 Transfer Case Optional with V6 Details Single-speed, for full-time all wheel drive; 50/50 torque split, front/rear MP 3022 Transfer Case Optional, V6 and V8 Details Electronically shifted two-speed with 4x4 low (lock), neutral, full-time active 4x4 gears; 2.72:1 low range Front Differential Conventional; 7.7 inch ring gear diameter; ratios, 3.06:1 with V6, 3.47:1 with V8 Rear Differential Conventional; 8.4 inch ring gear diameter on V6, 8.9 inch on V8.
Axle ratios, 3.06:1 3.6-liter engine; 3.47:1 5.7-liter engine Optional rear differential Electronic limited-slip (late availability), optional on V8 4x4 with MP3022 transfer case;
Same ring gear diameter, 3.47:1 axle ratio Alternator 160-amp; 180-amp or 220 amp depending on option content. Battery Group 65 maintenance-free 750CCA DIMENSIONS AND CAPACITIES
ACCOMMODATIONS
Wheelbase 114.8 (2915) Seating Capacity, Front/Second 2/3 Track, Front 63.9 (1623) Front Seat
Track, Rear 64.1 (1627) Head Room 40.0 (1015.8) Overall Length 189.8 (4821.8) Leg Room 40.3 (1024.5) Overall Width (Width at Mirrors) 84.8 (2154) Shoulder Room 58.6 (1488.6) Body Width 76.3 (1937.6) Hip Room 57.0 (1450) Overall Height (at Roof Rail / at Antenna) 69.4 (1761.8) / 71.7 (1820.8) Seat Travel 11.4 (290) Load Floor Height (Std Susp. / Air Susp) 32.4 (821.9) / 31.9 (810.5) SAE Volume 54.7 cu. ft. (1.55 cu. m) Sill Step Height (Std Susp. / Air Susp) 20.5 (521.1) / 20.2 (513.5) Rear Seat
Ground Clearance* 8.7 (220.0) / 11.6 (296.0) Head Room 39.3 (999) Chassis (Fuel Tank)* 9.5 (241.7) / 12.5 (317.7) Leg Room 38.6 (980) Front Axle* 8.5 (216.7) / 11.5 (292.7) Shoulder Room 58.0 (1474.3) Rear Axle* 10.2 (258.3) / 13.2 (334.3) Hip Room 56.5 (1435.2) Approach Angle* (air-dam off) 26.3 degrees / 35.9 degrees Knee Clearance 4.3 (110.0) Ramp Breakover Angle* 19.0 degrees / 25.1 degrees Couple 34.6 (880) Departure Angle* 26.4 degrees / 29.2 degrees SAE Volume 50.9 cu. ft. (1.4 cu. m) Frontal Area 31.0 sq. ft. (2.88 sq. m) Cargo Volume
Drag Coefficient Approximately 0.37 Behind Rear Seat 36.3 cu. ft. (1.03 cu. m) Aero 11.6 (cd x cross-sectional area) Fuel Tank Capacity 24.6 gal. (93.1L) * (with P245/70R17 Tire and 3.6L Engine) (Std Susp. / Air Susp Pos#2)
WEIGHTS (Estimates) MODEL ENGINE GVWR(a) lbs. (kg) CURB WEIGHT(b) lbs. (kg) PAYLOAD(c) lbs. (kg) 2WD Laredo 3.6-liter
5.7-liter 6500 (2948)
6500 (2948) 4470 (2028)
4780 (2169) 2030 (920)
1720 (780)
Limited 3.6-liter
5.7-liter 6500 (2948)
6500 (2948) 4600 (2087)
4920 (2232) 1900 (860)
1580 (715)
Overland 5.7-liter 6500 (2948) 4920 (2232) 1580 (715) 4WD Laredo 3.6-liter
5.7-liter 6500 (2948)
6500 (2948) 4660 (2114)
5020 (2278) 1840 (835)
1480 (670)
Limited 3.6-liter
5.7-liter 6500 (2948)
6800 (3084) 4850 (2201)
5150 (2336) 1650 (750)
1660 (750)
Overland 5.7-liter 6800 (3084) 5210 (2364) 1590 (720) (a) Gross Vehicle Weight Rating.
(b) Curb weight includes standard equipment and full quantities of fuel, lubricant and coolant.
(c) Payload is the maximum allowable weight of driver, passengers, cargo, and options, rounded to the nearest 10 lbs. (5kg). Weight Distribution (Front/Rear)
MODEL ENGINE 2WD 4WD Laredo 3.6-liter
5.7-liter 51/49
54/46 53/47
55/45 Limited 3.6-liter
5.7-liter 51/49
53/47 52/48
54/46 Overland 5.7-liter 54/46 54/46 Chassis specifications
BODY
Layout Longitudinal front engine, rear drive; 4x4 has transfer case with full time four wheel drive Front suspension Short- and long-arm independent (SLA), coil springs, gas-charged, twin-tube coil-over shock absorbers, upper- and lower-control arms (ìAî arms), stabilizer bar Rear suspension Multi-link rear suspension, coil spring, twin tube shocks (including load leveling for towing), aluminum lower control arm, independent upper links (tension and camber) plus a separate toe link. Steering Type Power rack-and-pinion Steering Ratio 18.9:1 on center, 15.7:1 at full lock Turn Circle 37.1 ft. (11.3 m) (lock-to-lock steering wheel rotations: 3.67) Front brakes 12.9 x 1.2 (328 x 30) vented disc with 1.89 (48) two-piston pin-slider caliper and ABS; 282 square inches swept area Rear brakes 12.6 x 0.55 (320 x 14) disc with 1.89 (48) single-piston pin-slider caliper and single-channel ABS(b); 257 square inches swept area Power Assist Single-rate, tandem diaphragm vacuum Notes Turning diameter is measured at the outside of the tires at curb height. Turning diameters and steering wheel turns, lock-to-lock, may differ with optional tires and wheels. Three-channel ABS standard on 4x2. Four-channel ABS standard on 4x4. Standard Laredo Tires P245/70R17 - Goodyear Fortera HL Black Sidewall All-Season — OWL Optional - 685 revs/mile Standard Limited tires P265/60R18 Michelin Latitude Tour Black Side-Wall All-Season — 691 revs/mile Standard Overland tires P265/50R20 Goodyear Fortera HL Black Sidewall All-Season — 690 revs/mile Optional, Limited and Overland P265/60R18 Michelin Latitude Tour Outside White Letter (OWL) All-Season — 691 revs/mile Wheels Cast aluminum. Laredo; 17-in. x 8-in., Limited; 18-in. x 8-in., Overland ; 20-in x 8-in. Trailer towing: all models can tow 3,500 pounds with the addition of a trailer hitch. For towing heavier trailers up to 7,400 pounds, buyers must get the Trailer Tow Group Class IV with the Hemi engine for North America. Maximum Trailer Weight = GCWR - Curb Wt. with hitch - 300 lbs. (allowance for driver and passenger) and must be decreased by the weight of optional equipment, cargo and additional passengers. Maximum trailer weights shown are rounded to the nearest 50 lbs. Tongue weight should be 10-15% of loaded trailer weight but may not cause vehicle to exceed GVWR or GAWR. Load equalizing hitch recommended for trailers over 2,000 pounds.
The rumor mill: how did we do?
In general, the rumors printed at Allpar were dead-on. Even the Phoenix engine reports got the horsepower exactly right, at 280 hp.
Ryan wrote, “Jeep will be moving the Grand Cherokee to the North Jefferson plant, along with the Durango. Both vehicles are already done being designed, and production starts in the spring. Both vehicles will be quite different than what they are now. The Aspen will be kicked because for some reason, people still like Escalades better.” He agreed on the Phoenix, put in the new Hemi at 380 hp, and suggested an SRT model. So far, he seems to be pretty close. The new Hemi has been downrated for the Grand Cherokee, though.
Redriderbob wrote, “About a year and half ago, I broke the word to you guys and gals at Allpar.com that the next generation of the Grand Cherokee would grow in size to cover both the Commander and Grand Cherokee lineups. I also stated that the next Grand Cherokee, Aspen, and Durango would all share a common platform. That is still true. Dodge will replace the Durango in 2012, one model year after the introduction of the new Grand Cherokee. The 2011 Jeep Grand Cherokee and 2012 Dodge Durango will share powertrains as well as chassis parts. The Chrysler Aspen's future is still undecided.”
A new source, whose information has been collaborated to a degree by others, noted that three engines will be available, with a possible SRT8 model also getting its own engine:
The new source wrote that each of these engines will get a five-speed automatic transmission; the best goes to the Hemi, which will have the reliable, comfortable 545RFE. Phoenix engines will get the usual Mercedes automatic. Finally, the diesel will get the same five-speed Mercedes automatic they get now.
Some more interesting features and options are slated to include:
As for looks, our guess was that Jeep will move back to the original Grand Cherokee styling cues; this appears to have been correct. Aerodynamic considerations have a much higher influence than before — which does not necessarily mean you should expect swoopy lines, since the new Ram doesn’t look aerodynamic but is, and the “aero-styled” Shadow wasn’t. We’re hoping the goofy headlight treatment will disappear — replaced either by the current “big round headlights” or by the Grand Cherokee’s original rectangles.
Redriderbob wrote, “It will draw super-heavy amounts of influence from the 2007 Jeep Trailhawk Concept. That vehicle was based on the 2007 Jeep Wrangler Unlimited platform that has a 116" wheelbase, the same wheelbase as the previous generation Dodge Durango! Front grille styling, as well as side profile styling cues will be very similar I am told. The vehicle will carry more chunky and edgy fenders. I have been told it will look more like a Range Rover Sport with Jeep DNA on steroids!”
Ryan wrote, “The Grand Cherokee will bring in some Commander qualities and design cues (interior wise) and expect something beautiful to compete with the luxury bound Range Rover.”
Since the new Grand Cherokee is due in late 2010, you might see an introduction at the next New York Auto Show in 2009... or you might not. Historically, Jeep has been showing new models in New York.
Thanks to Jeremy White for the interviews, and to Jim Choate for getting the photos up so early.
The Grand Cherokee is due for launch in September 2010 (delayed from July 2010); pilots were built in late 2008 for crash testing, ride/handling tests, and HVAC refinement. The final production-intent vehicle was built in January 2009.
Ralph Gilles said that the platform was co-developed with Mercedes (as opposed to being an adaption of the ML as Jim Press implied); the body structure is stiffer than the Mercedes ML.
An Alfa Romeo-based Grand Cherokee has been all but confirmed; below is an artist’s representation of how hit may appear. The Alfa might only be sold in export markets, where Fiat and Alfa Romeo are mainstream brands with heavy dealer, service, and parts support; or it might be sold in the US as well, adding an “import brand” stamp to those who positively will not buy an American vehicle. An extended version, dubbed the Dodge Durango, was also planned; this would go beyond the old Commander idea and provide minivan-like interior space.
Personal impressions (Jeremy White)
The exterior is very nice; the sculpting is dramatic yet smooth. Ralph Gilles told me they are almost at the "tear point of the metal and the sculpting could not be made deeper without other design compromises. The power liftgate is a new design, seemingly hidden within the rod covering.
The interior is very comfortable with just about all surfaces “soft touch” and good faux wood trim abounds. The control stack aluminum-look plastic is the only part that doesn't seem top notch, but it is still good quality. Interior panel gaps are tight and controls felt good. The air lift suspension was nice and the sunroof is huge. The dash and seats and instruments are well laid out and ergonomic. The two tone interior on display (Brown/Charcoal) has a nice contrast and color and the leather is very soft. Some of the dash seems to be leather and has stitching similar to the Ram. Back seat room is better than current Grand Cherokee and far better than the Commander.
Direct injection was left out of the V6 — an engineer explained that it caused more roughness and noise than was desirable on a luxury vehicle, and that the benefits did not merit using it at this time. It appears that three rows of seats will only be seen on the Durango version, which might be longer.
Features
The new 2011 Jeep Grand Cherokee will deliver better on-road performance and, despite having more power, up to 11% better gas mileage from its Pentastar V6. The new Quadra-Lift air suspension system with the Selec-Terrain system allows the driver to choose the drive system that best matches on- or off-road driving conditions (or go with “automatic”).
2011 Jeep Grand Cherokee powertrains: the flight of the Phoenix arrives
The base engine is a flexible-fuel 3.6-liter V-6 engine pumping out 280 horsepower (209 kW) and 260 lb.-ft. of torque (353 N•m) @ 4,800 rpm — an improvement of 70 hp and 25 lb-ft over the current 3.7 liter V6. Despite that, and a heavier vehicle (4,470 lb vs 4,261 lb), gas mileage should be 11% higher.
The 3.6-liter V-6 engine is a completely new, state of the art design with dual overhead camshafts (DOHC) and a high-pressure die-cast aluminum cylinder block with variable-valve timing (VVT). Gas mileage is better than the Toyota 4Runner and similar to the less off-road-worthy Honda Pilot.
The Phoenix V6 comes with the Mercedes W5A580 five-speed automatic, which has adaptive electronic control or Electronic Range Select (ERS) driver-interactive manual control. The gas tank has been increased to a 24.6 gallon capacity, which allows for a range of around 500 miles.
Pentastar V6 Hemi V8 Pilot 4Runner Explorer TrailBlazer ML450 Hybrid 2WD 16/23 14/20 17/23 16/21 14/20 14/20 (22 combined) AWD 16/22 13/19 16/22 16/20 13/19 14/20 n/a The optional Hemi V8 engine now delivers 360 horsepower (268 kW) and 390 lb.-ft. of torque (520 N•m) @ 4,250 rpm; it uses cylinder deactivation and variable valve timing to increase mileage. The Hemi is coupled to the reliable, smooth Chrysler-designed 545RFE five-speed automatic transmission, which has a sixth forward speed for highway kickdown. The premium Overland 4x4 weighs around 5,210 lb, an increase of 320 lb over the 2008 Overland.
2011 Jeep Grand Cherokee’s trailer towing capability is up to 7,400 pounds on rear wheel drive models equipped with the HEMI V-8 engine.
As in the past, the 2011 Jeep Grand Cherokee will be available in left- and right-hand drive with either diesel or petrol powertrains for international sale.
Quadra-Lift and Selec-Terrain™
The Quadra-Lift system features five height settings for optimum ride performance:
- Normal Ride Height (NRH): 8.1 inches of clearance for better aerodynamics during on-road driving
- Off-road 1: Lifts the vehicle an additional 1.5 inches to clear obstacles (9.6 inches)
- Off-road 2: An additional 3 inches of height for 11.1 inches of ground clearance
- Park Mode: Lowers the vehicle 1.5 inches from NRH for easy ingress/egress. NRH and Park mode are driver-selectable giving the driver control over vehicle ride height.
- Aero Mode: Lowers the vehicle .6 inches from NRH. Aero Mode is controlled by vehicle speed and adjusts for optimal performance and fuel economy.
The new Selec-Terrain™ traction control system lets customers choose the off-road setting; it electronically coordinates up to 12 different powertrain, braking and suspension systems, including throttle control, transmission shift, transfer case, Traction Control and Electronic Stability Control (ESC). The control dial allows the driver to choose from five driving conditions:
- Sand/Mud: Traction control and Quadra-Lift operate with sensitive response to wheel spin, and torque is tuned for optimal performance
- Sport: Provides enhanced on-road "fun-to-drive" capability
- Auto: Automatically adapts to any on- or off-road situation
- Snow: Vehicle traction and Quadra-Lift adjust for ultimate performance over snow-covered roads
- Rock: Quadra-Lift suspension raises to maximum height (11.1 inches) and the transfer case, differentials, and throttle coordinate to provide low-speed control
The new independent front and rear suspension features isolated front and rear suspension cradles. Variable-rate rear springs deliver improved on-road handling and comfort that complements the vehicle’s off-road capability. The new rear suspension allows the spare tire to be stored inside the vehicle as opposed to underneath.
Quadra Trac I delivers full-time four-wheel drive without any switches or levers to pull. The system provides smooth operation over a variety of road conditions. This light-weight single-speed case is both proven and highly efficient for enhanced fuel economy.
Quadra Trac II’s two-speed transfer case uses sensors to determine tire slip and take corrective action. The system uses Throttle Anticipate to sense quick movement in the throttle from a stop and maximizes traction before slippage occurs. When tire slippage is detected, as much as 100% of available torque is instantly routed to the axle with the most traction. Selec-Terrain is standard with Quadra Trac II and Quadra Drive II.
Quadra Drive II, with a rear Electronic Limited-Slip Differential (ELSD), delivers industry-leading tractive capability. The system instantly detects tire slip and smoothly distributes engine torque to tires with traction. In some cases, the vehicle will anticipate low traction and adjust in order to proactively limit or eliminate slip. Selec-Terrain is standard with Quadra Trac II and Quadra Drive II.
All 2011 Jeep Grand Cherokees equipped with either the off-road or the Quadra-Lift group are Trail Rated®. The Jeep Trail Rated badge on the 2011 Jeep Grand Cherokee indicates that the vehicle has been designed to perform in a variety of challenging off-road conditions identified by five key consumer-oriented performance categories: traction, ground clearance, maneuverability, articulation and water fording.
Jeep Trail Rated is a unique methodology used by Jeep Engineering to measure and predict off-road performance for all Jeep vehicles. Through a combination of natural and controlled field tests, Jeep Trail Rated provides a consistent measurement of off-road performance for all Jeep vehicles. Only Jeep vehicles are Trail Rated.
Body and chassis
The 2011 Jeep Grand Cherokee’s ruggedness is achieved with more than 5,400 welds in the body alone. Torsional stiffness is 146% more than the current Grand Cherokee and is stiffer than the BMW X5 and Toyota Highlander for improved durability and reduced noise, vibration, and harshness. With more than 3,700 mm of arc welding and 100 m of structural adhesive to augment welding, this marks a 53% increase in spot welds, a 42% increase in arc welds, and a 38% increase in structural adhesive.
The new interior now features rich materials and elegant appointments, as well as more room for both passengers and cargo. An optional CommandView® dual-pane sun roof provides twice as much glass surface than a standard sun roof and extends from the windshield to the rear of the vehicle. The front panel may be opened rearward, providing additional light and fresh air to first-row passengers. The rear panel, which is fixed, allows light and open viewing for second-row passengers and comes standard with a power sun shade.
The vehicle’s 114.8-inch wheelbase is 5.3 inches longer, but overall length is just 1.8 inches longer; coupled with three inches more width, the the size changes should improve cornering as well as interior space. Larger front door openings (1.9 inches wider; 2 inches higher) and rear doors that open 78° (vs. the old model’s 67 degrees) provide better access to the interior.
Inside, premium seating includes room for five passengers. An available fold-flat front-passenger seat provides improved cargo storage room (Laredo models). Rear seats recline 12° and move forward 12° for 24° of variation.
The cargo bay behind the rear seats has 6.8 more cubic feet of room (36.3 cubic feet total), and includes a storage unit with a rechargeable flashlight and new grocery hooks on both sides. The spare tire compartment includes removable dual storage bins for secure storage of muddy gear or other items. A new power rear liftgate is available.
Quality features
Engineers will conduct approximately 7.5 million customer-equivalent miles for durability and reliability testing of the all-new 2011 Jeep Grand Cherokee. Testing and validation in various climates include road trips to a variety of locations including Yucca, Arizona, Baudette, Minn. and Morgantown, West Virginia. A full battery of lab testing will include full-frame fatigue testing, door-slam testing and a road-test simulator.
The 2011 Jeep Grand Cherokee has gone through more than 244 hours of wind noise and aerodynamic evaluations in Chrysler LLC’s state-of-the-art aerodynamic and acoustic test facility in Auburn Hills, Mich.
Reliability and quality were achieved through extensive validation testing in developing the Jeep Grand Cherokee’s all-new 3.6-liter V-6 engine. More than 3.3 million customer-equivalent miles were recorded on engine dynamometers prior to production. Severity testing was increased 50% versus previous Chrysler V-6 engines — which have generally had strong durability — to accommodate high-load applications including trailer-towing.
The reduction of noise, vibration and harshness (NVH) was a key objective for every component during the design phase of the engine and was achieved by utilizing an advanced computer-aided engineering technique.
The use of a Quality Assurance Fixture (QAF) assures a high level of compliance at the start of production. The QAF allows engineers to look at the interior of the vehicle on a “simulated perfect body” which is a milled aluminum shell where all attachment points are matched exactly to CATIA modeling earlier in the program. This allows changes and design improvements earlier in the manufacturing process.
The company also employs techniques of Design for Six Sigma (DFSS), which is folding in "voice of the customer" data along with lessons learned to ensure that every vehicle is of the highest quality. The 2011 Jeep Grand Cherokee is the first new vehicle to have more than 100 DFSS projects.
Exterior design and 2011 Jeep Grand Cherokee aerodynamics
The removable lower front fascia delivers improved fuel economy, on-road performance and off-road capability. The lower front fascia features a large chromed appliqué (Limited and Overland models) that showcases available tow hooks.
Black appliqués on B-pillars give the day-light opening (DLO) an aerodynamic, modern appearance and a sleek profile. Optional chromed mirrors and door handles add to the profile and complement the full-chromed DLO surround on all models.
Taillamps wrap from the rear quarter panel to the back of the vehicle and create a solid form which achieves more of an upscale appearance. The treatment complements the front-end design and resonates with the rest of the exterior.
Seventeen-inch wheels are standard, with optional 18-inch and new-to-Jeep 20-inch wheels for 2011.
Jeep Grand Cherokee models equipped with a HEMI V-8 engine have 3.5-inch dual chromed exhaust tips, and those with the V-6 engine have a 3-inch single exhaust.
Safety and security
Standard safety features include Electronic Stability Control (ESC), Electronic Roll Mitigation (ERM), four-wheel Anti-lock Brake System (ABS) with rough-road detection, four-wheel Brake Traction Control System (BTCS), Passive Entry/Keyless Go, Remote keyless entry, express up/down windows for driver and front-seat passenger, seat-belt pretensioners, Trailer-Sway Control and Remote-Start which is standard on Overland and available on Limited.
Other standard safety features include full-length side-curtain air bags which extend protection to front and rear outboard passengers, seat-mounted side thorax air bags that enhance protection for the driver and front passenger and active head restraints which deploy in the event of a rear collision. The body structure is all new and designed to achieve expected safety performance in global markets (new roof-crush standards, side-impact standards and Euro pedestrian impact).
2011 Jeep Grand Cherokee connectivity and infotainment
The 2011 Jeep Grand Cherokee will feature uconnect guardian as a standard feature on all models (services provided by Hughes Telematics). uconnect guardian provides customers with the five most requested security features:
- Automatic Crash Notification – In the event of an accident, a call is placed and a request for assistance is dispatched to the vehicle’s location
- Emergency Call – With a push of the emergency button, customers are placed in contact with a trained emergency response specialist during an emergency situation
- Roadside Assistance Call – Connects customers to a uconnect customer care specialist who can connect them to Chrysler’s road-side assistance for towing or jump starts
- Remote Door Unlock – Remotely unlocks doors with a simple phone call
- Stolen Vehicle Location Assistance – Works with local authorities via on-demand tracking to provide the current location of the vehicle if it is stolen
Manufacturing
The 2011 Jeep Grand Cherokee will be built at the 2.7-million-square-foot Jefferson North Assembly Plant (JNAP) in Detroit, which has been the site of Grand Cherokee production since its introduction in 1992. Jefferson North Assembly is undergoing a 285,000-square-foot expansion to replace the existing body shop; changes throughout paint and assembly operations will give the facility a new level of manufacturing flexibility for multiple product capability.
2011 Jeep Grand Cherokee preliminary specifications
All dimensions are measured at curb weight with standard tires and wheels. Information shown is correct at time of publication, and is subject to change without notice.
Construction Steel un 3.6 liter engine Standard on all models. 16 mpg city, 22 mpg (AWD) or 23 mpg (RWD) highway.
Regular 87 octane fuel. See the Phoenix Engines page for specifications. Transmission (V8) Mercedes five-speed automatic Details Adaptive electronic control or Electronic Range Select (ERS) driver-interactive manual control and electronically modulated torque converter clutch Gearing 3.59, 2.19, 1.41, 1.0, 0.83:1; Reverse, 3.16:1; Final Drive, 3.06:1; OTGR, 2.54:1 5.7 liter Hemi V8 Optional on Laredo, Limited, and Overland.
360 hp (268 kW) @ 5,150 rpm; 390 lb-ft (520 Nm) @ 4,250 rpm.
5,800 rpm redline; 89 octane fuel required. Rated at 14/20 mpg 2WD, 13/19 4WD. Transmission (V6) Mopar 545RFE automatic. 545RFE details Three planetary gear sets, one overrunning clutch, with Electronic Range Select (ERS) driver interactive control, electronically controlled torque converter clutch Gear ratios 3.0, 1.67, 1.0, 0.75, 0.67:1; Reverse, 3.0:1; Final Drive, 3.47:1; OTGR, 2.32:1; kickdown. 1.50:1 MP 3010 Transfer Case Optional with V6 Details Single-speed, for full-time all wheel drive; 50/50 torque split, front/rear MP 3022 Transfer Case Optional, V6 and V8 Details Electronically shifted two-speed with 4x4 low (lock), neutral, full-time active 4x4 gears; 2.72:1 low range Front Differential Conventional; 7.7 inch ring gear diameter; ratios, 3.06:1 with V6, 3.47:1 with V8 Rear Differential Conventional; 8.4 inch ring gear diameter on V6, 8.9 inch on V8.
Axle ratios, 3.06:1 3.6-liter engine; 3.47:1 5.7-liter engine Optional rear differential Electronic limited-slip (late availability), optional on V8 4x4 with MP3022 transfer case;
Same ring gear diameter, 3.47:1 axle ratio Alternator 160-amp; 180-amp or 220 amp depending on option content. Battery Group 65 maintenance-free 750CCA DIMENSIONS AND CAPACITIES
ACCOMMODATIONS
Wheelbase 114.8 (2915) Seating Capacity, Front/Second 2/3 Track, Front 63.9 (1623) Front Seat
Track, Rear 64.1 (1627) Head Room 40.0 (1015.8) Overall Length 189.8 (4821.8) Leg Room 40.3 (1024.5) Overall Width (Width at Mirrors) 84.8 (2154) Shoulder Room 58.6 (1488.6) Body Width 76.3 (1937.6) Hip Room 57.0 (1450) Overall Height (at Roof Rail / at Antenna) 69.4 (1761.8) / 71.7 (1820.8) Seat Travel 11.4 (290) Load Floor Height (Std Susp. / Air Susp) 32.4 (821.9) / 31.9 (810.5) SAE Volume 54.7 cu. ft. (1.55 cu. m) Sill Step Height (Std Susp. / Air Susp) 20.5 (521.1) / 20.2 (513.5) Rear Seat
Ground Clearance* 8.7 (220.0) / 11.6 (296.0) Head Room 39.3 (999) Chassis (Fuel Tank)* 9.5 (241.7) / 12.5 (317.7) Leg Room 38.6 (980) Front Axle* 8.5 (216.7) / 11.5 (292.7) Shoulder Room 58.0 (1474.3) Rear Axle* 10.2 (258.3) / 13.2 (334.3) Hip Room 56.5 (1435.2) Approach Angle* (air-dam off) 26.3 degrees / 35.9 degrees Knee Clearance 4.3 (110.0) Ramp Breakover Angle* 19.0 degrees / 25.1 degrees Couple 34.6 (880) Departure Angle* 26.4 degrees / 29.2 degrees SAE Volume 50.9 cu. ft. (1.4 cu. m) Frontal Area 31.0 sq. ft. (2.88 sq. m) Cargo Volume
Drag Coefficient Approximately 0.37 Behind Rear Seat 36.3 cu. ft. (1.03 cu. m) Aero 11.6 (cd x cross-sectional area) Fuel Tank Capacity 24.6 gal. (93.1L) * (with P245/70R17 Tire and 3.6L Engine) (Std Susp. / Air Susp Pos#2)
WEIGHTS (Estimates) MODEL ENGINE GVWR(a) lbs. (kg) CURB WEIGHT(b) lbs. (kg) PAYLOAD(c) lbs. (kg) 2WD Laredo 3.6-liter
5.7-liter 6500 (2948)
6500 (2948) 4470 (2028)
4780 (2169) 2030 (920)
1720 (780)
Limited 3.6-liter
5.7-liter 6500 (2948)
6500 (2948) 4600 (2087)
4920 (2232) 1900 (860)
1580 (715)
Overland 5.7-liter 6500 (2948) 4920 (2232) 1580 (715) 4WD Laredo 3.6-liter
5.7-liter 6500 (2948)
6500 (2948) 4660 (2114)
5020 (2278) 1840 (835)
1480 (670)
Limited 3.6-liter
5.7-liter 6500 (2948)
6800 (3084) 4850 (2201)
5150 (2336) 1650 (750)
1660 (750)
Overland 5.7-liter 6800 (3084) 5210 (2364) 1590 (720) (a) Gross Vehicle Weight Rating.
(b) Curb weight includes standard equipment and full quantities of fuel, lubricant and coolant.
(c) Payload is the maximum allowable weight of driver, passengers, cargo, and options, rounded to the nearest 10 lbs. (5kg). Weight Distribution (Front/Rear)
MODEL ENGINE 2WD 4WD Laredo 3.6-liter
5.7-liter 51/49
54/46 53/47
55/45 Limited 3.6-liter
5.7-liter 51/49
53/47 52/48
54/46 Overland 5.7-liter 54/46 54/46 Chassis specifications
BODY
Layout Longitudinal front engine, rear drive; 4x4 has transfer case with full time four wheel drive Front suspension Short- and long-arm independent (SLA), coil springs, gas-charged, twin-tube coil-over shock absorbers, upper- and lower-control arms (ìAî arms), stabilizer bar Rear suspension Multi-link rear suspension, coil spring, twin tube shocks (including load leveling for towing), aluminum lower control arm, independent upper links (tension and camber) plus a separate toe link. Steering Type Power rack-and-pinion Steering Ratio 18.9:1 on center, 15.7:1 at full lock Turn Circle 37.1 ft. (11.3 m) (lock-to-lock steering wheel rotations: 3.67) Front brakes 12.9 x 1.2 (328 x 30) vented disc with 1.89 (48) two-piston pin-slider caliper and ABS; 282 square inches swept area Rear brakes 12.6 x 0.55 (320 x 14) disc with 1.89 (48) single-piston pin-slider caliper and single-channel ABS(b); 257 square inches swept area Power Assist Single-rate, tandem diaphragm vacuum Notes Turning diameter is measured at the outside of the tires at curb height. Turning diameters and steering wheel turns, lock-to-lock, may differ with optional tires and wheels. Three-channel ABS standard on 4x2. Four-channel ABS standard on 4x4. Standard Laredo Tires P245/70R17 - Goodyear Fortera HL Black Sidewall All-Season — OWL Optional - 685 revs/mile Standard Limited tires P265/60R18 Michelin Latitude Tour Black Side-Wall All-Season — 691 revs/mile Standard Overland tires P265/50R20 Goodyear Fortera HL Black Sidewall All-Season — 690 revs/mile Optional, Limited and Overland P265/60R18 Michelin Latitude Tour Outside White Letter (OWL) All-Season — 691 revs/mile Wheels Cast aluminum. Laredo; 17-in. x 8-in., Limited; 18-in. x 8-in., Overland ; 20-in x 8-in. Trailer towing: all models can tow 3,500 pounds with the addition of a trailer hitch. For towing heavier trailers up to 7,400 pounds, buyers must get the Trailer Tow Group Class IV with the Hemi engine for North America. Maximum Trailer Weight = GCWR - Curb Wt. with hitch - 300 lbs. (allowance for driver and passenger) and must be decreased by the weight of optional equipment, cargo and additional passengers. Maximum trailer weights shown are rounded to the nearest 50 lbs. Tongue weight should be 10-15% of loaded trailer weight but may not cause vehicle to exceed GVWR or GAWR. Load equalizing hitch recommended for trailers over 2,000 pounds.
The rumor mill: how did we do?
In general, the rumors printed at Allpar were dead-on. Even the Phoenix engine reports got the horsepower exactly right, at 280 hp.
- 3-liter turbo diesel, from Mercedes (sticking with Mercedes diesels for Jeeps has been confirmed by Jim Press — but not the same one used now, though the displacement will be the same. This might be an option just for Europe — or not; they’ve been popular in Canada.)
- 3.6 liter Phoenix engine (280 hp?)
- 5.7 liter variable-cam Hemi (350 hp?)
- “Jeep naturals:” Load-levelling, height-controlled air suspension (optional) and “terrain select” four wheel drive
- From minivans: Power liftgate, video, and ParkSense and ParkView™ rear assist and side blind spot detection
- From Liberty: “Command View®” dual sunroof system
- Satellite radio/phone system
- Adaptive cruise control (which maintains a distance from the next car, as well as a speed)
Ryan wrote, “The Grand Cherokee will bring in some Commander qualities and design cues (interior wise) and expect something beautiful to compete with the luxury bound Range Rover.”
