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2007-2010 Jeep Wrangler "JK": the ultimate affordable SUV with minivan power

2011-2017 Jeep Wrangler1997-2006 Wrangler

With its original-Army-Jeep look, the Jeep Wrangler was an icon, and the company treated it carefully. For 2007-10, it gained in user-friendliness and capability, but lost the AMC 4.0 liter engine loved by many owners.

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The 2007 Wrangler (coded "JK" as were the 2011-17 models) was still a major improvement: It had better ground clearance, larger wheels and tires, enhanced axles, updated Command-Trac® and Rock-Trac™ transfer cases, electric axle lockers, and an electronic disconnecting front sway bar that increasesd wheel travel.

On-road performance gained, thanks to a 100% stiffer (in bending) frame, a two inch longer wheelbase, 3 and a half inch wider track, lower spring rates, advanced shock tuning, and increased jounce and rebound travel.

Criterion Hummer
Run. ground clearance 10"9"10"9.4"
Approach angle (°) 423144.337
Departure angle (°) 372440.431.5
Breakover angle (°) 252825.522
Gas mileage (4WD) 16/2017/2117/1918/22

The interior was larger, with 4.6 inches more hip room and 5.1 inches more shoulder room, with greater legroom and cargo space. There were more roof options, with dozens of different door, top, and windshield combinations, including a new three-piece modular hardtop.

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Safety was increased with electronic stability control and roll mitigation, dual-stage air bags, and seat-mounted side air bags, while convenience rose with optional power windows and door locks, navigation, and a 368-watt Alpine® stereo.

Despite all these changes, the price of the Wrangler fell to $18,765 for the base model, including destination charge. The four-door Wrangler Unlimited started at $20,410 (two-wheel drive; add $2,000 for four wheel drive) including destination.

From 2007 to 2010, the company sold 392,464 Jeep Wranglers within the US, along with 62,580 outside North America, 35,412 in Canada, and 8,529 in Mexico.

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Steve Kasher, who was present at the NAIAS introduction, wrote:

The new Wrangler may not be a surprise to most here but its character has been shift both in definition and status. Whereas the outgoing TJ, like the YJ before it, had a bit of jauntiness to it (the belt line sat fairly low) the new TK Wrangler takes a more primal look, made somewhat brutal in rock-crushing Rubicon trim... It impresses you with less crudity and more purpose, as if to tell competitors that this is and continues to be the ultimate hill climber.
Jeep made two different frame lengths again - one for two door and one for four door Wranglers. The models were Wrangler X, Sahara, and Rubicon; all kept solid Dana axles, removable doors, exposed hinges, fold-down windshield, and removable and convertible tops.

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The Jeep Wrangler X and Sahara used an enhanced Dana 30 front axle and Dana 35 rear axle. The 2007 Jeep Wrangler Rubicon's front and rear axles were both newly upgraded Dana 44s; they were optional on the lesser models. Skid plates protected the fuel tank, transfer case, and automatic transmission oil pan.

For the first time, the Jeep Wrangler offered an electronic-disconnecting front stabilizer bar - Active Sway Bar System (ASBS). Its normal Ramp Travel Index (RTI) was 652; it went up to 832 with the front stabilizer bar disconnected.

Jeep Wrangler X and Sahara used the second-generation Command-Trac® NV241, part-time, two-speed transfer case, with a 2.72:1 low-range gear ratio. A Trac-Lok® limited-slip rear differential provided extra torque and grip during low-traction situations.

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The 2007 Jeep Wrangler Rubicon model used the Rock-Trac™ NV241 two-speed transfer case with a 4.0:1 low-range gear ratio, as well as electric front- and rear-axle lockers and 32-inch B.F. Goodrich Off-Road tires.

More On-road Refinement

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On-road comfort was aided by a 100% stiffer frame, 50% stiffer body, revised five-link coil suspension and shock tuning, a two inch longer wheelbase, and 3.5-inch wider track. The Wrangler gained new steering and suspension geometry, along with better sound-deadening for 20% less noise.

Lower suspension spring rates made the ride more comfortable. Standard stability control had three modes - "full on," "full off" and "partial on."

Low-pressure twin-tube shock absorbers were tuned to provide better balance between jounce and rebound motions. Jeep Wrangler Sahara and Rubicon had standard high-pressure monotube shocks, utilizing Low Speed Tunable (LST) valve technology.

The 2007 Jeep Wrangler's new recirculating-ball steering configuration used a cross-car steering linkage system for a stiffer steering linkage.

More Interior Space and Comfort

Front and rear seating areas were both wider than in the past; fold-and-tumble rear seats provided more storage. Two more inches of space behind the rear seat nearly doubled the cargo capacity and provided room for a lockable underfloor storage area.

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A three-piece modular hard top system had left- and right-front passenger panels and a rear panel, all removable by one unusually deft and tall person.

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The new Sunrider™ soft top included a "sun roof" - by folding the soft top back completely over the driver and front passenger, creating a 52x30-inch opening.

New, More Powerful Engine

The 3.8-liter overhead valve V-6 engine, used on minivans in the past, replaced the beloved 4.0-liter AMC in-line six engine. With 205 horsepower and 240 lb.-ft. of torque, Jeep Wrangler had a six-speed manual transmission or optional four-speed automatic.

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The 3.8-liter was lighter than the 4.0 and maintained higher torque at speeds above 3400 rpm, though falling short at low engine speeds. The increase in power allowed for a towing capacity of 2,000 pounds and an optional tow package, which included a hitch, Dana 44 axles, and a 4.10:1 ratio.

3.8 "Imperial/minivan"205240
4.0 AMC/Jeep190221
More Stopping Power

New 16-inch four-wheel-disc anti-lock brakes were standard; they included off-road anti-lock-braking tuning, with sustained wheel lockup for better performance on loose dirt, gravel, sand, and mud. Wheels and tires were expanded across the board, with 16 inchers on the Wrangler X model and 17-inch wheels on the others; 18-inch wheels were optional on Wrangler Sahara.

Worldwide Availability

The Jeep Wrangler was available with a 2.8 liter VM Motori diesel engine, as well as left- and right-hand-drive models; the engine was upgraded for 2011 models. Wranglers were built at the Stickney Avenue Toledo Assembly Plant in Toledo, Ohio.

See our 2007 Jeep Wrangler review (from 2007)

The Jeep Wrangler Islander Edition

After a hiatus of over 20 years, the Jeep Wrangler Islander re-appeared for 2010, as a limited production edition available for a $995 (MSRP) surcharge over the usual Wrangler Sport or Wrangler Unlimited Sport price.

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The Islander was available for Sport models, on both Wrangler and Wrangler Unlimited; it was available by special order only, requires the body to be Surf Blue (PQD). Islanders were made in February 2010, with production reportedly in the hundreds rather than thousands.

In addition to standard Sport equipment, the Islander added the 32 inch wheel and tire group, with 17 inch aluminum painted black wheels and LT 225/75R17 mud-terrain T/A tires; tubular side steps; a unique decal; dark gray seats with surf blue inserts and blue logos stitched in; a leather-wrapped steering wheel with blue accent stitching; and rubber slush mats.

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Chrysler also brought back the Mountain Edition - again, mainly an appearance package. Chrysler representatives promised numerous changes for 2011 or 2012 which would please off-road enthusiasts.

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2009 Jeep Wrangler changes

2009 Jeep Wrangler. Aside from color changes, the main alterations for 2009 were switching right-hand-drive postal-unit models from two doors to four doors; making hill-start assist standard on all models, with all transmissions; and including trailer sway control with the Trailer Tow Group. Welcome interior features were a larger sun visor, another bin for the full center console, new storage nets, and a center dome lamp with switched directional lighting. Small changes were made to the available option packages, including making the power group standard on Sahara and making Sunrider the standard on soft tops.

2010 Jeep Wrangler

Tow hooks, fog lamps, full-length center console, front floor mats, and premium cloth trim were standard on all models. Front seatback map pockets were included with the standard cloth seats. Sahara and Rubicon could be ordered with leather-faced trim. Metallic green, orange pearl, detonator yellow were replaced by surf blue pearl, dark charcoal pearl, and natural green pearl. The Sunrider® soft top was made easier to remove; fuel saver indicator was standard; new 18 inch silver aluminum wheels were standard on Sahara; new "carbon" 17-inch aluminum wheels were standard on Rubicon. Bluetooth™ phone connection was included with navigation. Compass and outside temperature were standard on all models. The sun visors were larger and slide; the front dome lamp (with on/off switch) was new; two-tone leather was available on Sahara and Rubicon.

Our predictions were accurate!

We had written:

The ancient Jeep Wrangler will
be redesigned in 2006-07, with a much-rumored extended-wheelbase four-door version coming
as well; we don't expect the appearance to change much. Jeep Wranglers will cease production on July 21, 2006,
according to the Toledo Blade's Julie McKinnon [thanks, Imperial4ever,
for letting us know about it], and the new Toledo Jeep Assembly Plant
will, within the week, start production of the new Wranglers. The two
and four door versions will be started within five weeks of each other.

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We'd expect the next
generation Wrangler to have a wider body, better off-road
capabilities, more electronic aids to off-roading, and live axles (oops, we've now been told "dual solid axles"). We suspect they will get an independent front suspension and safety
enhancements. The extra width may be a way to gain anti-roll safety without the punishing ride of past Wranglers' bound suspensions. The unique folding windshield and removable doors will remain, but a modular hardtop might be used instead of the expensive, troublesome fabric. As with other Jeeps, a new front stabilizer bar disconnection feature can add off-road ability without compromising on-road ride: by removing the stabilizer bar, the wheels can move farther independently of each other (you would not want to drive the Wrangler like this at anything resembling ordinary street speeds).

The Wrangler is expected to have the 3.7 liter V6 since DCX is
intent on eliminating unnecessary engines and transmissions; though the 3.8 might also show up, since the 3.7 might be discarded entirely in favor of the 3.8 across the board (the 3.8 produces 205 hp). Dana has won the axle contract again. [It ended up with the 3.8]

Dimensions were in inches (millimeters) unless otherwise noted.

3.8 liter engine (see the 3.8 V6 page)
Displacement…230.5 cu. in. (3778 cu. cm)
Valve SystemOHV, 12 valves, roller followers, hydraulic lifters
Construction Cast-iron block, aluminum alloy heads
Compression Ratio 9.6:1
Power (SAE net)… 205 hp (153 kW) @ 5,200 rpm (53.9 hp/L)
Torque (SAE net) 240 lb.-ft. (325 N•m) @ 4,000 rpm
Oil Capacity6 qt. (5.7L) plus filter
Coolant Capacity 13.36 qt. (12.64L) Std.
Meets Tier 2 Bin 5 (federal) and LEV 2 (CA) emission requirements

ELECTRICAL SYSTEM: 160 amp alternator with 600 cold-cranking-amp battery.

Axle ratio: 3.21 standard, 4.10 optional. 4.10 standard on Rubicon.

Overall top gear ratio: 2.69 with 3.21 gears, 3.44 with 4.10 gears

New Venture Gear NSG 370 manual transmission
Synchronized in all forward gears and reverse;
multi-rail shift system with top-mounted shift lever. Hydraulically actuated clutch.
Gear Ratios: 4.46, 2.61, 1.72, 1.25, 1.00, 0.84:1 (Reverse: 4.06:1)

42RLE automatic transmission: Electronic governor, electronically controlled converter clutch

Gear Ratios: 2.84, 1.58, 1.00, 0.69; Reverse, 2.21. 4.10 axle ratio, 2.83 overall top gear ratio.


Both cases had high and low 4WD modes, 2WD high, and neutral positions. The New Venture Gear NV241 "Command-Trac" had a 2.72:1 low ratio, while the NV241OR "Rock-Trac" had a 4.0:1 low ratio and heavier-duty construction.

CLEARANCES P225/75R16 P245/75R16 P255/75R17 P255/70R18 LT255/75R17
Approach Angle Deg. 40.8 42.0 43.8 44.6 44.3
Breakover Angle Deg. 21.8 23.1 24.9 25.5 25.4
Departure Angle Deg. 37.4 38.7 40.3 40.6 40.4
Front Axle to ground (inches) 9.1 9.6 10.3 10.6 10.5
Rear Axle to ground (inches) 8.8 9.4 10.1 10.3 10.2

Various dimensions and capacities (English units)
General Overall Length 152.8
Overall Width without mirrors…73.7
Overall Height, Hard top70.9
Track, Front 61.9
Track, Rear …61.9
Overhang, Front26.7
Overhang, Rear30.6
Maximum Payload incl. occupants 1000 lbs.
Seating Capacity, F/R 2/2
Front Headroom41.3
Leg Room41.0
Shoulder Room55.8
Hip Room55.6
Seat Travel Driver - 9.4
Rear Headroom40.3
Leg Room35.6
Shoulder Room61.6
Hip Room44.7
Cargo Liftover Height…27.8
Max Cargo Width at Gate Opening58.7
Min Cargo Height at Gate Opening 37.0
Max Cargo Height at Gate Opening37.1
Min Cargo Height at Gate Opening37.0
Distance between wheelhouses44.7
Cargo Volume - rear seat installed56.5 cu. ft.
Cargo volume, Rear seat removed61.2 cu. ft.
Cargo volume, Behind Rear Seat 17.15 cu. ft.

The 2007-10 Jeep Wrangler JK used a ladder-type frame and open steel body; the longitudinal engine placement was up front and four wheel drive was standard.


Automatic transmission added 15 pounds.
Wrangler X, Manual: 3760 lbs. (1403 kg)
Wrangler Sahara, 3951 lbs.
Wrangler Rubicon, 4104 lbs. (1532 kg)

Front: Live axle, leading arms, track bar, coil springs, stabilizer bar,
low-pressure (on 16 inch wheel packages) gas-charged shock absorbers-std.;
Monotube high-pressure (on 17 and 18 inch wheel packages)
gas-charged shock absorbers-std. Rubicon;
Electronic Sway Bar Disconnect System (ASDS) opt.

Rear: Live axle, trailing arms, track bar, coil springs, stabilizer bar, low-pressure (on 16 inch wheel packages) gas-charged shock absorbers-std.;
Monotube high-pressure (on 17 and 18 inch wheel packages)
gas-charged shock absorbers-std. Rubicon
Power recirculating-ball steering with damper. 16.7:1 overall ratio, 35 foot turning diameter. 3.5 turns.

Single diaphragm vacuum assist with four wheel antilock brakes and both on- and off-road calibrations. Drum-in-hat parking brakes. Front: 11.9 x 1.1 vented rotors - Rear: 12.44 x 0.47 solid rotor. Single-piston floating calipers.

There were both steel (standard on X) and cast aluminum (optional on X) 16x7 wheels. All other wheels were cast aluminum and came in 17 x 7.5 and 18 x 7.5 sizes. Tires included:

P225/75R16, Goodyear Wrangler ST
P245/75R16, Goodyear Wrangler SRA
P255/75R17, Goodyear Wrangler SRA
P255/70R18, Bridgestone Dueler 693
LT255/75R17, B.F.Goodrich Mud Terrain


Text Font Line Design Number

The 2018 Jeep Wrangler JL: suspension aluminum vs steelopen or fixed roof pickup
body engineering
weight, strength, and safetytransmissionsengines

Chrysler 1904-2018

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