🏷️ Basic Information

Make:

Jeep

Model:

Wrangler

Year:

2004

Model Code:

TJ

👋 Introduction

Market Position:

The 2004 Jeep Wrangler (TJ generation) is a highly capable, iconic off-road vehicle, renowned for its ruggedness and go-anywhere attitude. It competes in the compact SUV/off-road segment, though its pure off-road focus sets it apart.

Competitors:

While fewer direct competitors existed in 2004 with such extreme off-road prowess, it was often cross-shopped with vehicles like the Toyota Tacoma (4x4 variants), Hummer H3 (later models), and more rugged versions of the Ford Explorer or Chevrolet Blazer.

Key Features:

Solid front and rear axles, coil spring suspension, iconic 7-slot grille, removable doors and top, robust 4x4 system (Command-Trac or optional Selec-Trac).

📋 Manual Details

Coverage:

Complete Workshop Service and Repair

Page Count:

Over 1500 pages (estimated)

Manual Type:

Factory Service Manual / Workshop Manual

Language:

English

Format:

Digital (likely PDF, often provided as a downloadable file or CD-ROM)

📖 Manual Coverage

Engine:

Detailed diagnostics, repair, and overhaul procedures for all engine variants

Transmission:

Service and repair of manual and automatic transmissions

Drivetrain:

Transfer case, axles (Dana 30 front, Dana 35 rear standard), driveshafts, U-joints

Suspension:

Front and rear suspension (coil springs, solid axles), shock absorbers, sway bars

Brakes:

Hydraulic system, disc/drum configurations, ABS (if equipped), parking brake

Steering:

Power steering system, steering column, steering linkage

Electrical:

Complete wiring diagrams, component testing, diagnosis of electrical systems, battery, charging system, starting system

Body:

Body panel repair, doors, hinges, latches, interior trim, convertible top system

HVAC:

Heating, ventilation, and air conditioning system diagnosis and repair

Emissions:

Emissions control systems, catalytic converter, EGR, evaporative emissions

Maintenance:

Oil changes, filter replacements, fluid checks and changes, spark plug replacement, belt replacement

Diagnostics:

Troubleshooting guides for common and complex issues, diagnostic trouble codes (DTCs)

Repair:

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

Overhaul:

Complete engine and transmission rebuild procedures

Installation:

Component installation procedures (e.g., suspension upgrades, brake components)

Depth:

Comprehensive, covering from basic fluid changes to full drivetrain rebuilds and complex electrical diagnostics.

📊 Manual Specifications

File Format:

PDF (searchable text, bookmarked sections, high-resolution diagrams)

Print Quality:

High-resolution diagrams and clear, legible text suitable for printing.

Binding Type:

N/A (Digital Format)

Paper Type:

N/A (Digital Format)

⚙️ Engine Specifications

Engine Name:

4.0L Inline 6-Cylinder (PowerTech)

Engine Displacement:

3952 cc (241 cubic inches)

Engine Codes:

ERH

Engine Configuration:

OHV, 12-valve

Horsepower:

190 hp @ 4600 rpm

Torque:

235 lb-ft @ 3200 rpm

Fuel Delivery:

Electronic Fuel Injection (Multi-port)

Fuel Type:

Unleaded gasoline (87 octane recommended)

Spark Plug Type:

Champion Copper Plus (e.g., RC12YC or equivalent)

Engine Oil Type:

SAE 10W-30 (API SN or higher)

Engine Oil Capacity:

5.0 US quarts (4.7 liters) with filter

Coolant Type:

Mopar OAT (Orange) Antifreeze/Coolant, 5-Year/100,000 Mile Formula

Timing Mechanism:

Timing Chain (known for durability)

🔧 Transmission

Transmission Type:

NV3550 5-Speed Manual Transmission

Transmission Type:

42RLE 4-Speed Automatic Transmission

Manual Transmission Fluid:

ATF+4 (Mopar specification) or equivalent

Automatic Transmission Fluid:

ATF+4 (Mopar specification)

Transfer Case Fluid:

NP241 transfer case: Mopar NV241 Transfer Case Fluid (or Dexron III/Mercon)

📐 Dimensions

Wheelbase:

93.4 inches (2372 mm)

Overall Length:

159.4 inches (4049 mm)

Overall Width:

66.5 inches (1689 mm)

Overall Height:

70.2 inches (1783 mm)

Ground Clearance:

Approximately 8-10 inches (depending on tire size)

Approach Angle:

Approx. 47.7 degrees

Departure Angle:

Approx. 39.2 degrees

Breakover Angle:

Approx. 23.7 degrees

Curb Weight:

Approx. 3,250 - 3,400 lbs (1474 - 1542 kg)

Gross Vehicle Weight Rating:

Approx. 4,300 lbs (1950 kg)

Standard Wheel Size:

15 x 8 inches

Standard Tire Size:

30x9.50R15

Wheel Bolt Pattern:

5 x 4.5 inches (5 x 114.3 mm)

🛡️ Safety Features

NHTSA Rollover Rating:

3 out of 5 stars (2004 model year)

ABS:

Available (standard on some trims, optional on others)

Airbags:

Driver and front passenger airbags

💡 Technology Features

Infotainment System:

Basic AM/FM stereo with CD player, optional premium audio, manual climate controls.

Driver Assistance:

Limited; primarily focused on core driving and off-road capability. No advanced electronic driver aids like adaptive cruise control or lane keeping assist.

Connectivity:

No integrated Bluetooth or advanced connectivity features typical of modern vehicles.

🔧 Maintenance

Oil Change Interval:

Every 5,000 miles (8,000 km) or 6 months, whichever comes first (severe duty may require more frequent changes).

Tire Rotation:

Every 5,000 miles (8,000 km)

Engine Air Filter:

Inspect every 15,000 miles (24,000 km), replace as needed.

Coolant Flush:

Every 5 years or 100,000 miles (160,000 km)

Brake Fluid:

DOT 3

Power Steering Fluid:

ATF+4 (Mopar specification) or equivalent

Common Issues:

Frame rust (particularly in areas with road salt), exhaust manifold cracks (4.0L inline-6), cooling system leaks (radiator, water pump), OPDA (Output Shaft Position Sensor) failure on some transmissions, sway bar disconnect issues (if equipped).

📚 Vehicle History

Heritage:

Jeep has a legendary history in off-road vehicles, dating back to its origins in World War II. The Wrangler nameplate, introduced in 1987, directly continues the lineage of the CJ (Civilian Jeep) series.

Generation:

TJ (1997-2006). The 2004 model represents a mature iteration of the TJ platform, featuring coil springs and significant updates from earlier generations.

Assembly Location:

Toledo, Ohio, USA

🏆 Awards & Recognition

Off Road Capability:

Consistently praised by automotive journalists and off-road enthusiasts for its superior off-road performance and capability, often considered a benchmark in its class.

Resale Value:

Known for strong resale value due to its enduring popularity and off-road demand.