🏷️ Basic Information

Make:

Jeep

Model:

Wrangler

Model Generation:

JK

Model Years Covered:

2007, 2008, 2009

Chassis Code:

JK

👋 Introduction

Vehicle Segment:

Compact SUV / Off-Road Vehicle

Key Competitors 2007-2009:

Toyota FJ Cruiser, Nissan Xterra, Hummer H3, Land Rover Defender (where applicable)

Iconic Off Road Capability:

Renowned for its rugged chassis, solid axles (front and rear on many configurations), 4x4 systems (Command-Trac, optional NV241G HD transfer case with Rock-Trac on Rubicon), and ground clearance.

Iconic Design:

Distinctive seven-slot grille, round headlights, prominent fender flares, and removable doors/top options.

Versatility:

Available in 2-door (Wrangler) and 4-door (Wrangler Unlimited) configurations.

📋 Manual Details

Covered Regions:

Global (North America focus for specifications)

Estimated Page Count:

Hundreds of pages (specific count not provided, but described as 'complete')

Manual Type:

Workshop Service Repair Manual

Language:

English

Format:

Downloadable (likely PDF)

📖 Manual Coverage

Engine System:

Engine mechanical, lubrication, cooling, fuel, ignition, exhaust, engine control systems (ECM/PCM)

Transmission System:

Manual transmission (NSG370), Automatic transmission (42RLE), transfer case operation and repair

Drivetrain System:

Front and rear axle assemblies, driveshafts, universal joints, locking differentials (if applicable to trim)

Suspension Steering:

Front and rear suspension components, shock absorbers, springs, steering gear, power steering system

Brake System:

Front and rear brakes (disc/drum configurations), ABS, brake hydraulics, parking brake

Electrical System:

Battery, charging system, starting system, lighting, instrument cluster, body control module (BCM), power distribution

HVAC System:

Heating, ventilation, air conditioning system diagnosis and repair

Body Exterior:

Body panels, doors, hood, tailgate, bumpers, convertible top mechanisms, exterior trim

Body Interior:

Interior trim, seats, dashboard, console, airbags, seat belts

Chassis Frame:

Frame construction, body mounting

Diagnostics:

Diagnostic trouble codes (DTCs), scan tool procedures, component testing

Preventive Maintenance:

Oil changes, filter replacements, fluid checks and changes, inspections

Troubleshooting:

Systematic diagnosis of common and uncommon faults, symptom-based troubleshooting guides

Repair Procedures:

Step-by-step repair instructions for all major components and systems

Component Replacement:

Detailed instructions for removing and installing parts such as engine, transmission, suspension, brakes, etc.

Wiring Diagrams:

Comprehensive electrical wiring schematics for all vehicle systems

Torque Specifications:

Precise torque values for all fasteners

Specifications Data:

All necessary technical data, tolerances, and specifications

Depth Level:

Complete Factory Service Manual (FSM) level, covering from basic maintenance to complex overhauls and diagnostics

📊 Manual Specifications

Digital Format:

PDF (standard for downloadable manuals)

Printability:

High-resolution, printable pages; allows printing of entire manual or specific sections

Digital Binding:

N/A (digital format)

Digital Paper Type:

N/A (digital format)

Text Searchability:

Searchable text content within the PDF for quick information retrieval

⚙️ Engine Specifications

Engine Code:

ERH

Engine Type:

3.8L V6 OHV 12-valve

Displacement:

3778 cc (231 cu. in.)

Horsepower:

202 hp @ 5200 rpm

Torque:

237 lb-ft @ 4000 rpm

Fuel Delivery:

Sequential Multi-Port Fuel Injection (MPI)

Fuel Type:

Unleaded gasoline

Block Material:

Cast Iron

Cylinder Head Material:

Aluminum

Bore X Stroke:

96.0 mm x 86.0 mm (3.78 in x 3.39 in)

Compression Ratio:

9.6:1

🔧 Transmission

Transmission Type Standard:

6-speed manual transmission (NSG370)

Transmission Type Optional:

4-speed automatic transmission (42RLE)

Transfer Case Standard:

NV137 / NV241 G (Command-Trac - 2 Speed, Part-Time 4WD)

Transfer Case Optional Rubicon:

NV241 G HD (Rock-Trac - 2 Speed, Part-Time 4WD with 4:1 low range ratio)

Axle Ratio Common:

3.21, 3.73, 4.10 (depending on trim and tire size)

📐 Dimensions

Wheelbase 2 Door:

95.4 inches (2423 mm)

Wheelbase 4 Door:

116.0 inches (2946 mm)

Length 2 Door:

160.0 inches (4064 mm)

Length 4 Door:

179.4 inches (4557 mm)

Width Body:

72.4 inches (1839 mm)

Height To Top:

72.4 inches (1839 mm)

Curb Weight 2 Door Approx:

4,045 lbs (1835 kg)

Curb Weight 4 Door Approx:

4,266 lbs (1935 kg)

Towing Capacity Max:

2,000 lbs (907 kg) for 2-door, 3,500 lbs (1588 kg) for 4-door (with proper equipment)

🛡️ Safety Features

NHTSA Rollover Resistance Rating:

3-star (for 2007-2009 models, may vary)

Electronic Stability Control:

Standard on all models (ESC)

Traction Control:

Standard on all models (TCS)

Anti-Lock Brakes:

Standard on all models (ABS)

Airbags:

Front driver and passenger airbags, optional side curtain airbags (on some models/trims)

Seat Belts:

3-point seat belts with pretensioners

💡 Technology Features

Audio System Options:

Standard AM/FM stereo with CD player, optional Infinity speaker system, SiriusXM Satellite Radio.

Navigation System:

Optional navigation system available on higher trims, often integrated with the audio unit.

Cruise Control:

Standard on most trims.

Auxiliary Input:

Standard auxiliary audio input jack for connecting external media players.

🔧 Maintenance

Oil Change Interval:

Every 6,000 miles or 6 months, whichever comes first (refer to manual for specific conditions/oil type)

Tire Rotation Interval:

Every 7,500 miles

Engine Air Filter Replacement:

Every 30,000 miles or as needed based on driving conditions

Cabin Air Filter Replacement:

Every 15,000 miles or annually

Engine Oil Type:

SAE 5W-30 Synthetic (API certified)

Engine Oil Capacity:

4.7 quarts (4.5 L) with filter (3.8L V6)

Coolant Type:

Mopar Antifreeze/Coolant (MS-9769) or equivalent (HOAT - Hybrid Organic Acid Technology), typically a 50/50 mix with distilled water

Transmission Fluid Manual:

NSG370: Manual transmission fluid, e.g., Mopar NV T-3500 specification

Transmission Fluid Automatic:

42RLE: ATF+4 (MS-9602) automatic transmission fluid

Transfer Case Fluid:

Mopar NV241 / NV241 HD specification (e.g., Mopar transfer case lubricant or equivalent)

Differential Fluid Front Rear:

API GL-5, SAE 80W-90 hypoid gear oil (consider synthetic for heavy use/off-roading). Add friction modifier if equipped with limited-slip differentials.

Clutch Wear Manual:

Some manual transmission models can experience premature clutch wear, especially under heavy use or off-roading.

Oil Cooler Leaks:

Potential for oil cooler line leaks or cracks, leading to oil loss.

Powertrain Control Module:

Occasional PCM issues or software glitches requiring reprogramming or replacement.

Suspension Components:

Wear on ball joints, tie rod ends, and track bars can occur with off-road use and higher mileage.

📚 Vehicle History

Jeep Legacy:

Jeep's lineage traces back to World War II military vehicles, establishing a global reputation for off-road capability and ruggedness.

Jk Generation Introduction:

The JK generation replaced the TJ Wrangler, introducing a significant redesign with a more modern interior, improved on-road manners, and the introduction of the 4-door Wrangler Unlimited.

Jk Platform Changes:

The JK utilized a new, stronger frame, rack-and-pinion steering for the first time on a Wrangler (in 2WD variants initially, later adopted across the board), and a more refined suspension.

Manufacturing Location:

Toledo, Ohio, USA

🏆 Awards & Recognition

Off Road Recognition:

Consistently recognized by off-road enthusiasts and publications for its legendary capability.

Consumer Reports Ratings:

Ratings varied, with strengths in off-road performance and versatility, but sometimes noted for average on-road comfort and reliability concerns in specific areas.