🏷️ Basic Information

Make:

Jeep

Model:

Wrangler

Model Code:

TJ

Model Year:

2004

Chassis Code:

TJ

👋 Introduction

Target Audience:

Jeep Wrangler TJ owners, mechanics, repair shops, parts suppliers, restoration specialists, off-road enthusiasts requiring specific part identification.

Differentiation:

Distinguished by its professional quality, comprehensive part coverage, and detailed exploded diagrams, facilitating accurate identification and ordering of even the smallest components.

Features Summary:

Essential resource for sourcing OEM and aftermarket parts, troubleshooting component issues via diagrams, and managing parts inventory. Emphasizes clarity and completeness.

📋 Manual Details

Primary Coverage:

All parts and components for Jeep Wrangler TJ (2004)

Component Scope:

Engine, drivetrain, suspension, steering, brakes, electrical, interior, exterior body, accessories, hardware.

Estimated Page Count:

Variable, typically hundreds of pages for a comprehensive parts catalog.

Type:

Parts Manual Catalog / Parts List

Language:

English

Format:

Digital (likely PDF, specified as professional quality with enlargeable views)

📖 Manual Coverage

Powertrain:

Engine assemblies, cylinder heads, pistons, crankshafts, camshafts, oil pump, water pump, intake and exhaust manifolds, fuel system (injectors, pump, lines), cooling system components.

Drivetrain:

Transmission (manual/automatic), transfer case, driveshafts, axles (front/rear), differentials, axle shafts, hub assemblies.

Suspension And Steering:

Front axle, rear axle, leaf springs, shock absorbers, control arms, steering gearbox, steering column, tie rods, drag links, ball joints, bushings.

Brakes:

Front brake calipers, rotors, pads; rear brake drums, shoes, wheel cylinders (depending on configuration), brake lines, master cylinder, brake booster.

Electrical System:

Starter motor, alternator, battery, wiring harnesses, fuse box, relays, lighting (headlights, taillights, interior), ignition system components, sensors.

Body And Exterior:

Frame, body panels (fenders, hood, doors, tailgate), bumpers, grille, windshield, side glass, rear glass, soft top components, hardtop components, mirrors, door handles, latches.

Interior:

Seats, seat belts, dashboard, instrument cluster, steering wheel, center console, door panels, interior trim, floor mats, pedals, shifter components.

Hardware And Fasteners:

Bolts, nuts, screws, washers, clips, retainers for all specified components.

Part Identification:

Detailed exploded diagrams for visual identification of all parts.

Part Number Cross-Reference:

Manufacturer part numbers for ordering and procurement.

Assembly/Disassembly Guidance:

Implied by exploded diagrams, aiding in understanding component relationships for removal and installation.

Component Grouping:

Parts organized by functional systems and assemblies for logical referencing.

Depth:

Comprehensive cataloging of every part, including fasteners and minor components. Facilitates precise part ordering and inventory management.

📊 Manual Specifications

Format Details:

Likely a high-resolution PDF format, optimized for digital viewing and printing. Ability to enlarge views suggests excellent image quality.

Diagram Clarity:

High-quality, clear exploded diagrams designed for detailed part identification.

Digital Format:

N/A (digital product)

Digital Medium:

N/A (digital product)

⚙️ Engine Specifications

Engine Type:

Inline 6-Cylinder, naturally aspirated

Engine Displacement:

4.0L (3952cc)

Engine Code:

ERH (Power Tech I-6)

Bore X Stroke:

3.875 in x 3.580 in (99.0 mm x 91.0 mm)

Compression Ratio:

8.7:1

Horsepower:

190 hp @ 4600 rpm

Torque:

235 lb-ft @ 3200 rpm

Fuel Delivery:

Sequential Multi-Port Fuel Injection (MPI)

Fuel Type:

Unleaded gasoline, 87 octane recommended

Valvetrain:

Overhead Valve (OHV), 12 valves

Block Material:

Cast Iron

Head Material:

Cast Iron

Engine Variant Coverage:

This manual covers the primary 4.0L I6 engine. It may also implicitly cover other minor variations if parts are shared or documented.

🔧 Transmission

Transmission Type:

6-speed manual transmission (NV3550)

Transmission Type:

4-speed automatic transmission (42RLE)

Transfer Case:

NP231 Command-Trac (standard) / NP241OR (Rubicon)

Manual Transmission Fluid:

Mopar Manual Transmission Lubricant (or equivalent specification like ATF+4 for some NV3550 variants, consult specific service manual for exact specification).

Automatic Transmission Fluid:

Mopar ATF+4 (MS-9602)

Transfer Case Fluid:

Mopar NP231/NP241 Transfer Case Fluid (or equivalent specification, often Dexron III/Mercon)

📐 Dimensions

Wheelbase:

93.4 inches (2372 mm) for short wheelbase

Length:

151.5 inches (3848 mm) for short wheelbase

Width:

73.1 inches (1857 mm)

Height:

72.7 inches (1847 mm) (soft top)

Curb Weight:

Approximately 3500-3800 lbs (1588-1724 kg), depending on configuration

Gross Vehicle Weight Rating Gvwr:

Approximately 5000-5200 lbs (2268-2359 kg)

Bolt Pattern:

5x4.5 inch (5x114.3 mm)

Wheel Size Standard:

15-inch or 16-inch wheels

Tire Size:

P215/75R15, P225/75R16, or LT225/75R16 depending on trim and options

🛡️ Safety Features

NHTSA Frontal Crash Rating:

Four-star rating for driver and front passenger (2004 model year)

IIHS Frontal Offset Rating:

Acceptable (IIHS data for TJ generation)

ABS:

Optional (Standard on Rubicon, available on others)

Airbags:

Driver and passenger front airbags

Seat Belts:

Three-point front seat belts, two-point rear lap belts (later models may have three-point rear belts).

Body On Frame:

Classic body-on-frame construction for ruggedness and off-road durability.

💡 Technology Features

Audio System Options:

Factory AM/FM/CD player, optional Infinity speaker systems.

Navigation:

No factory integrated navigation system typically available for the 2004 model year.

Cruise Control:

Available option depending on trim level.

Auxiliary Input:

Not typically standard; aftermarket solutions common.

Power Windows Locks:

Optional on some trims, not standard.

🔧 Maintenance

Oil Change Interval:

Typically every 3,000-7,500 miles or 6-12 months, depending on oil type and driving conditions (refer to specific service manual for exact interval).

Tire Rotation Interval:

Every 5,000-7,500 miles

Transmission Fluid Change Interval:

Automatic: every 30,000-60,000 miles. Manual: inspect periodically, replace as needed or at higher mileage intervals.

Coolant Change Interval:

Typically every 30,000-50,000 miles or 2-3 years.

Engine Oil Specification:

SAE 10W-30 (API certified, check owner's manual for specific classification)

Engine Oil Capacity:

6 US quarts (5.7 liters) with filter

Coolant Type:

Ethylene Glycol based coolant (Chrysler/Mopar specific type recommended)

Brake Fluid Type:

DOT 3

Common Issues Tj:

Leaking valve cover gaskets, exhaust manifold cracks (especially on 4.0L), rear main seal leaks, differential housing rust, radiator leaks, sway bar links wear, front track bar wear.

Focus Areas:

Regular inspection and maintenance of the suspension, steering, brakes, and drivetrain are crucial for optimal off-road performance and longevity.

📚 Vehicle History

Jeep Legacy:

Descended from the original military Jeep, representing unparalleled off-road capability and rugged design.

Tj Generation:

The TJ generation (1997-2006) represented a significant modernization of the Wrangler, introducing coil springs for improved ride comfort and handling compared to its leaf-sprung predecessor (YJ).

2004 Updates:

The 2004 model year continued the TJ's established platform, offering the robust 4.0L I6 as the primary engine, along with the option of an automatic transmission. Minor trim and option package adjustments may have occurred.

Manufacturing Location:

Toledo, Ohio, USA

Production Years:

1997-2006 (TJ Generation)