🏷️ Basic Information

Make:

Jeep

Model:

Wrangler

Generation:

JK Generation (2007-2018)

Relevant Years:

2007, 2008, 2009, 2010

Chassis Code:

JK

👋 Introduction

Market Segment:

Off-road focused SUV, iconic 4x4 vehicle.

Key Competitors Era:

Toyota FJ Cruiser, Nissan Xterra, Hummer H3, Land Rover Defender (in some markets).

Vehicle Defining Traits:

Rugged off-road capability, removable doors and roof, solid axle construction (historically, JK still had solid front axle), strong aftermarket support.

Manual Selling Point:

Unparalleled technical depth and accuracy, identical to factory technician resources, enabling comprehensive self-service and advanced repairs.

📋 Manual Details

Covered Models:

Jeep Wrangler JK

Covered Years:

2007-2010

Covered Engine Variants:

3.8L Petrol (EGF), 2.8L Diesel (CRD)

Page Count:

Extensive (Exact number not specified, but described as 'everything')

Manual Type:

Factory Service and Repair Manual

Language:

English

Format:

Online, HTTP-style

Compatibility:

Windows Computers

Browser Requirement:

Internet Explorer (Required)

📖 Manual Coverage

Engine Mechanical:

Complete engine disassembly, assembly, diagnostics, tuning, and overhaul for both 3.8L V6 petrol and 2.8L CRD diesel engines.

Engine Management:

Fuel injection, ignition system, emissions control, sensors, actuators, powertrain control module (PCM) diagnostics and reprogramming.

Transmission:

Manual (NSG370) and Automatic (42RLE) transmissions: removal, installation, internal repair, clutch service, torque converter diagnostics.

Drivetrain:

Four-wheel drive system (Command-Trac, optional Rock-Trac), transfer case (NV241 GII/J) service, front and rear axle (Dana 30/44) overhaul, CV joints, driveshafts, U-joints.

Suspension:

Front and rear suspension geometry, coil springs, shock absorbers, control arms, sway bars, steering linkage, alignment specifications, lift kit installation considerations.

Brakes:

Front and rear disc brake systems, ABS, traction control (ETC), brake fluid specifications, bleeding procedures, component replacement (calipers, rotors, pads), parking brake.

Steering:

Power steering system, steering column, steering gear/rack and pinion, hydraulic pump, fluid specifications, tie rod ends, power steering fluid cooler.

Electrical System:

Battery, charging system (alternator), starting system (starter motor), lighting (headlights, taillights, interior), fuses, relays, wiring diagrams for all systems.

Body And Chassis:

Frame construction, body panel removal/installation, doors, hood, tailgate, interior trim, seats, convertible top mechanism, hardtop installation/removal.

HVAC:

Heating, ventilation, and air conditioning system: refrigerant types, component testing, diagnosis, component replacement (compressor, evaporator, condenser, blower motor).

Safety Systems:

Airbag system (SRS), seatbelt operation and diagnostics, child restraint systems.

Routine Maintenance:

Oil change intervals, filter replacements (oil, air, fuel, cabin), fluid checks and top-offs, tire rotation and pressure checks, spark plug replacement.

Diagnostic Troubleshooting:

Step-by-step diagnostic procedures for all major systems, using diagnostic trouble codes (DTCs) and specified tools.

Component Replacement:

Detailed instructions for replacing all major and minor components, including torque specifications for fasteners.

Rebuild Procedures:

Comprehensive rebuild procedures for engines, transmissions, transfer cases, and differentials.

Wiring Diagrams:

Detailed and color-coded electrical wiring diagrams for all circuits and systems.

Specifications And Tolerances:

Precise technical specifications, measurements, and allowable tolerances for all serviceable parts and assemblies.

Depth Of Coverage:

Extremely high; described as 'the most technical of all Wrangler service-repair manuals' and covering 'everything'.

Target Audience:

Professional Jeep mechanics, experienced DIY technicians, and serious enthusiasts.

Diagnostic Capabilities:

Advanced diagnostics, including scan tool data interpretation and system-specific troubleshooting trees.

Repair Methodology:

Factory-level repair procedures, including specialized tool requirements and techniques.

📊 Manual Specifications

Digital Format:

HTTP-style online manual (proprietary format accessed via browser).

Searchability:

Fully searchable text content.

Print Quality:

Not Applicable (Digital format, but content is of high technical quality).

Binding Type:

Not Applicable (Digital format).

Paper Type:

Not Applicable (Digital format).

⚙️ Engine Specifications

Petrol Engine Option:

3.8L V6 'EGF' Pentastar predecessor.

3.8L V6 Horsepower:

202 hp @ 5200 rpm (approximate)

3.8L V6 Torque:

237 lb-ft @ 4000 rpm (approximate)

2.8L Crd Horsepower:

177 hp @ 3800 rpm (approximate, varies by tuning)

2.8L Crd Torque:

330 lb-ft @ 1600 rpm (approximate, varies by tuning)

3.8L V6 Fuel Delivery:

Sequential Electronic Multi-Port Fuel Injection (MPI).

2.8L Crd Fuel Delivery:

Common Rail Direct Injection (CRDI).

Diesel Engine Option:

2.8L Common Rail Diesel (CRD) VM Motori (Export Markets).

3.8L Engine Code:

EGF

2.8L Crd Engine Code:

VM Motori R428

🔧 Transmission

Standard Transmission Petrol:

6-speed Manual (NSG370)

Standard Transmission Diesel:

6-speed Manual (NSG370)

Optional Transmission Petrol:

4-speed Automatic (42RLE)

Optional Transmission Diesel:

4-speed Automatic (42RLE)

Transfer Case:

NV241 GII (Command-Trac) standard, NV241 J (Rock-Trac) optional on Rubicon models.

Fluid Specifications Manual:

AXLE & MANUAL TRANSMISSION LUBRICANT: Mopar Hypoid Gear Lubricant (SAE 75W-90, API GL-5) or equivalent.

Fluid Specifications Automatic:

ATF+4 (MS-9602) for 42RLE transmission.

📐 Dimensions

Wheelbase 2 Door:

95.4 inches (2423 mm)

Wheelbase 4 Door Unlimited:

116.0 inches (2946 mm)

Length 2 Door:

160.5 inches (4077 mm)

Length 4 Door Unlimited:

183.4 inches (4658 mm)

Curb Weight 2 Door:

4,103 lbs (1861 kg) (approximate, varies by configuration)

Curb Weight 4 Door Unlimited:

4,439 lbs (2013 kg) (approximate, varies by configuration)

🛡️ Safety Features

NHTSA Rollover Rating 2 Door:

4 out of 5 stars (for 2007-2010 models).

IIHS Crash Test Results:

Good in frontal offset, marginal in side impact (for earlier JK models, ratings vary by year and specific test).

Standard Safety Features:

4-wheel Anti-lock Brakes (ABS), Electronic Stability Control (ESC), Traction Control System (TCS), Electronic Roll Mitigation (ERM), Hill Start Assist (HSA).

Standard Passive Features:

Driver and front passenger airbags, front seat belt pretensioners.

💡 Technology Features

Infotainment Systems Era:

Basic Uconnect systems, AM/FM/CD/MP3 radios, optional navigation (MyGIG system).

Driver Assistance Features:

ABS, ESC, TCS, ERM, Hill Start Assist (HSA).

Connectivity Options:

Optional SiriusXM Satellite Radio, auxiliary audio input jacks.

🔧 Maintenance

Oil Change Interval Petrol:

Every 6,000 miles (9,600 km) or 6 months, whichever comes first.

Oil Change Interval Diesel:

Every 5,000 miles (8,000 km) or 6 months, whichever comes first (varies by operating conditions).

Air Filter Replacement:

Inspect every 15,000 miles (24,000 km), replace as needed or at 30,000 miles (48,000 km).

Engine Coolant Flush:

Every 60,000 miles (96,000 km) or 5 years for the 3.8L. Diesel interval may vary.

Engine Oil 3.8L:

SAE 5W-20, API SN certified, MS-6395 compliant.

Engine Oil 2.8L Crd:

SAE 5W-30 Low SAPS Synthetic Diesel Engine Oil, API CJ-4 or higher.

Coolant Type:

Mopar OAT (Organic Additive Technology) Antifreeze/Engine Coolant (Purple) or equivalent.

Common Issues 3.8L:

Oil filter adapter leaks, intake manifold gasket leaks, occasional piston slap on cold start, early models could experience oil dilution from EGR on diesel.

Common Issues Diesel:

DPF regeneration issues (later models), turbocharger issues, glow plug problems, EGR valve issues.

Common Issues General Jk:

Death wobble (front end shimmy, often due to worn steering/suspension components), HVAC blower motor failures, leaks (windshield, doors, hardtop), PCM issues.

📚 Vehicle History

Jeep Lineage:

Direct descendant of the WWII Willys MB, a lineage of rugged, go-anywhere utility vehicles.

Jk Generation Launch:

Introduced for the 2007 model year, replacing the TJ Wrangler.

Jk Key Changes Vs Tj:

Longer wheelbase (especially for Unlimited model), wider track, larger interior, 3.8L V6 engine (replacing the 4.0L I6), significantly updated interior and exterior styling, introduction of a four-door Unlimited model as standard.

Manufacturing Location:

Toledo, Ohio, USA

Jk Production Years:

2007-2018

🏆 Awards & Recognition

Off Road Awards:

Consistently recognized by off-road publications and enthusiasts as a benchmark for off-road capability.

Overall Vehicle Reviews Era:

Praised for off-road prowess and iconic styling, often criticized for on-road refinement and fuel economy compared to competitors.

Manufacturer Certification:

Factory Service Manual, indicating it meets Jeep's standards for repair information.