🏷️ Basic Information

Make:

Jeep

Model:

Wrangler

Year:

2004

Chassis Code:

TJ

Vin Code:

1J

👋 Introduction

Segment:

Compact SUV / Off-Road Vehicle

Key Differentiation:

Renowned off-road capability, rugged design, open-air driving experience.

Competitors 2004:

Toyota Tacoma, Nissan Xterra, Ford Bronco (prior generations), Land Rover Defender (prior generations).

Powertrain:

Robust 4.0L inline-six engine, choice of manual or automatic transmissions.

Chassis:

Body-on-frame construction for durability.

Drivetrain:

Command-Trac NV241OR part-time transfer case with 2.72:1 low range.

Suspension:

Solid front and rear axles with coil springs.

Doors:

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

📋 Manual Details

Primary Focus:

Workshop Service & Repair

Target Audience:

Professional Technicians & Experienced DIYers

Estimated Pages:

1500+

Type:

Comprehensive Service Manual

Language:

English

Format:

PDF (Downloadable)

📖 Manual Coverage

Engine Mechanical:

Yes (4.0L Inline-6)

Engine Management:

Yes (Ignition, Fuel Injection, Emission Controls)

Transmission Manual:

Yes (NV3550 5-Speed)

Transmission Automatic:

Yes (42RLE 4-Speed)

Transfer Case:

Yes (NV241OR 'Off-Road' 2.72:1 Ratio)

Axles:

Yes (Dana 30 Front, Dana 44 Rear)

Suspension Front:

Yes (Coil Springs, Solid Axle, 5-Link)

Suspension Rear:

Yes (Coil Springs, Solid Axle, 4-Link)

Steering:

Yes (Power Steering, Steering Gear)

Brakes Front:

Yes (Vented Discs)

Brakes Rear:

Yes (Solid Discs)

Electrical System:

Yes (Wiring Diagrams, Component Locations, Diagnostics)

Body And Frame:

Yes (Body Panels, Doors, Hood, Fenders, Frame)

HVAC:

Yes (Heating, Ventilation, Air Conditioning)

Restraints:

Yes (Seat Belts, Airbag System)

Routine Maintenance:

Yes (Oil Changes, Filter Replacements, Fluid Checks)

Troubleshooting:

Yes (Diagnostic Flowcharts, Symptom-Based Guides)

Engine Repair:

Yes (Overhaul, Component Replacement)

Transmission Repair:

Yes (Rebuild, Component Replacement)

Suspension Service:

Yes (Component Replacement, Alignment Specs)

Brake Service:

Yes (Pad/Rotor Replacement, Bleeding)

Electrical Diagnostics:

Yes (Fault Code Interpretation, Circuit Testing)

Body Repair:

Yes (Panel Replacement, Dent Repair Guidance)

HVAC Service:

Yes (Component Replacement, Refrigerant Handling)

Torque Specifications:

Yes (All critical fasteners)

Depth:

Complete Rebuild and Overhaul Procedures

Diagnostic Level:

Advanced Diagnostics and Troubleshooting

Wiring Diagrams:

Comprehensive Electrical Schematics

📊 Manual Specifications

File Type:

PDF

Searchable Text:

Yes

Resolution:

High-resolution (Suitable for printing)

Binding:

N/A (Digital Download)

Paper:

N/A (Digital Download)

⚙️ Engine Specifications

Engine Code:

ERH

Engine Type:

4.0L SOHC Naturally Aspirated Inline-6

Displacement:

3952 cc (241 cubic inches)

Bore X Stroke:

3.88 in x 3.56 in (98.5 mm x 90.5 mm)

Compression Ratio:

9.7:1

Horsepower Max:

190 hp @ 4600 rpm

Torque Max:

235 lb-ft @ 3200 rpm

Fuel Delivery:

Sequential Multi-Port Fuel Injection (MPI)

Fuel Type:

Unleaded Gasoline (87 Octane Recommended)

Fuel Capacity:

19.0 gallons (72 liters)

🔧 Transmission

Transmission Type Std:

NV3550 5-Speed Manual

Transmission Type Opt:

42RLE 4-Speed Automatic

Manual Gear Ratios:

1st: 3.75, 2nd: 2.35, 3rd: 1.51, 4th: 1.00, 5th: 0.77, Reverse: 3.75

Automatic Gear Ratios:

1st: 2.80, 2nd: 1.57, 3rd: 1.00, 4th: 0.73, Reverse: 2.00

Transfer Case:

NV241OR (2.72:1 low range)

Manual Fluid:

AXLE & MANUAL TRANSMISSION LUBRICANT (MS-9070) - Chrysler specification

Automatic Fluid:

ATF+4 (MS-9602) - Chrysler specification

📐 Dimensions

Wheelbase 2Door:

93.4 inches (2372 mm)

Wheelbase 4Door:

103.4 inches (2626 mm)

Length 2Door:

151.4 inches (3845 mm)

Length 4Door:

161.4 inches (4100 mm)

Width:

66.7 inches (1694 mm)

Height:

70.0 inches (1778 mm)

Ground Clearance:

10.2 inches (259 mm)

Curb Weight 2Door Manual:

Approx. 3,500 lbs (1588 kg)

Curb Weight 4Door Auto:

Approx. 3,900 lbs (1769 kg)

Towing Capacity:

2,000 lbs (907 kg)

🛡️ Safety Features

NHTSA Rollover Resistance:

Four-Star (for 2-door models, varies slightly by configuration)

ABS:

Standard (4-wheel disc brakes with ABS)

Airbags:

Driver and Passenger Frontal Airbags

Seat Belts:

Three-point front seat belts with pretensioners, lap belts in rear

💡 Technology Features

Audio System:

Factory AM/FM/CD player standard on most trims. Optional Infinity speaker system.

User Interface:

Basic dashboard layout focused on functionality. Limited integrated technology compared to modern vehicles.

Features:

No advanced driver-assistance systems (ADAS) typically found on modern vehicles.

Features:

Minimal connectivity; typically relies on aftermarket solutions for Bluetooth or auxiliary input.

🔧 Maintenance

Oil Change Interval:

Every 3,000 miles (4,800 km) or 3 months, whichever comes first (severe service) or 5,000 miles (8,000 km) / 6 months (normal service). Check manual for detailed recommendation.

Air Filter Replacement:

Every 15,000 miles (24,000 km) or 12 months.

Spark Plug Replacement:

Refer to manual, typically around 100,000 miles for OE plugs. Consult manual for specific type.

Transmission Fluid Change Auto:

Every 30,000 miles (48,000 km) or 24 months.

Transmission Fluid Change Manual:

Every 60,000 miles (96,000 km) or 48 months.

Engine Oil Type:

SAE 10W-30 (API Certified)

Engine Oil Capacity:

6.0 US quarts (5.7 liters) with filter

Coolant Type:

Chrysler OAT (Organic Additive Technology) Extended Life Antifreeze/Coolant (MS-9769) or equivalent (typically orange color)

Brake Fluid Type:

DOT 3

Power Steering Fluid Type:

ATF+4 (MS-9602)

Common Problems Tj:

Cracked cylinder heads (earlier models, less common on 2004), rust in key areas (rocker panels, floor pans, frame), exhaust manifold cracks, oil filter adapter housing leaks, cooling system leaks (radiator, water pump), interior wear and tear.

📚 Vehicle History

Jeep Legacy:

Roots trace back to WWII Willys MB, iconic global leader in off-road vehicles.

Wrangler Tj Generation:

Second generation Wrangler, produced from 1997-2006. Featured a coil-spring suspension replacing the leaf springs of its predecessors, significantly improving on-road ride and off-road articulation.

Tj Key Updates 2004:

Introduction of the 4-door Wrangler Unlimited (LJ) model, longer wheelbase offering increased passenger and cargo space. Minor interior updates and potentially revised option packages.

Production Plant:

Toledo Complex, Toledo, Ohio, USA

🏆 Awards & Recognition

Off Road Acclaim:

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

Resale Value:

Historically strong resale value due to its enduring appeal and off-road prowess.