🏷️ Basic Information

Make:

Jeep

Model:

Grand Cherokee

Model Code:

WG

Year:

2004

👋 Introduction

Segment:

Mid-size Luxury SUV / Off-Road Capable SUV

Competitors 2004:

Ford Explorer, Chevrolet TrailBlazer, Toyota 4Runner, Nissan Pathfinder, Land Rover Discovery

Defining Characteristics:

Body-on-frame construction, robust four-wheel-drive systems, comfortable interior for its class, respectable off-road capability, strong towing capacity.

Intended Users:

Enthusiast owners performing DIY maintenance and repairs, professional automotive technicians, restoration specialists.

Manual Benefit:

Enables accurate diagnostics, efficient repairs, and proper maintenance, saving time and money while ensuring vehicle longevity and performance.

📋 Manual Details

Engine Coverage:

4.0L Inline 6-Cylinder (PowerTech), 4.7L V8 (PowerTech), 4.7L V8 HO (High Output)

Transmission Coverage:

42RE (4-Speed Automatic), 45RFE / 545RFE (4-Speed/5-Speed Automatic)

Drivetrain Coverage:

Four-wheel drive systems (Selec-Trac, NV242, NV247, NV231 - if applicable to WG chassis)

Suspension Coverage:

Front and Rear Suspension (Solid Axle, Independent Front Suspension variations)

Brake Coverage:

Front and Rear Disc Brakes, ABS System

Electrical Coverage:

Wiring Diagrams, Lighting, Power Accessories, Diagnostics

Body And Chassis Coverage:

Body Panels, Interior Trim, Glass, Frame

Estimated Pages:

1500-2000+ (typical for comprehensive service manuals of this era)

Type:

Factory Service Manual / Workshop Manual

Language:

English

Format:

Digital (likely PDF), Print-on-Demand (POD) available

📖 Manual Coverage

Powertrain:

Engine mechanical and electrical systems, fuel delivery, ignition, cooling, exhaust, transmission, transfer case, differentials, driveshafts, axles.

Chassis:

Suspension (front and rear), steering, brakes (hydraulic, ABS), wheels, tires.

Body And Interior:

Body construction, exterior panels, doors, hood, liftgate, windows, interior trim, seats, HVAC system, exterior and interior lighting.

Electrical And Electronics:

Battery, charging system, starting system, ignition system, lighting, instrument cluster, power windows, locks, mirrors, audio system, wiper/washer system, safety systems (airbags, seatbelts), diagnostic trouble codes (DTCs) and troubleshooting flowcharts.

Maintenance:

Scheduled maintenance, oil changes, fluid checks and replacements, filter replacements, tune-ups, inspections.

Diagnostics:

Troubleshooting guides, symptom-based diagnostics, component testing, use of diagnostic tools (e.g., DRB III).

Repair:

Step-by-step repair procedures for all major components and systems, including engine rebuilds, transmission overhauls, suspension and steering component replacement, brake system service, electrical component repair.

Technical Specifications:

Torque specifications, clearances, fluid capacities and types, electrical specifications, diagnostic data.

Depth:

Comprehensive, suitable for professional mechanics and advanced DIYers. Covers everything from routine maintenance to complete engine and transmission overhauls, including detailed diagnostic procedures and wiring diagrams.

📊 Manual Specifications

Digital Format:

PDF

Searchability:

Text-searchable PDF with hyperlinked table of contents and cross-references.

Digital Quality:

High-resolution scans for clear diagrams, illustrations, and text.

Print Binding:

Spiral-bound or perfect-bound for lay-flat usability (for physical copies).

Print Paper:

Durable, high-quality paper suitable for workshop environments (for physical copies).

⚙️ Engine Specifications

Engine 1:

4.0L (3952cc) SOHC V6 (PowerTech)

Engine 1 Bore X Stroke:

98.5 mm x 87.0 mm

Engine 1 Compression Ratio:

9.7:1

Engine 1 Horsepower:

195 hp @ 4800 rpm

Engine 1 Torque:

230 lb-ft @ 3200 rpm

Engine 2:

4.7L (4701cc) SOHC V8 (PowerTech)

Engine 2 Bore X Stroke:

93.0 mm x 86.0 mm

Engine 2 Compression Ratio:

9.0:1

Engine 2 Horsepower:

235 hp @ 4750 rpm

Engine 2 Torque:

295 lb-ft @ 3200 rpm

Engine 3:

4.7L (4701cc) SOHC V8 HO (High Output)

Engine 3 Compression Ratio:

10.1:1

Engine 3 Horsepower:

260 hp @ 5000 rpm

Engine 3 Torque:

325 lb-ft @ 3800 rpm

Engine Management:

Sequential Multi-Port Fuel Injection (MPI)

Emission Controls:

Catalytic Converter, On-Board Diagnostics (OBD-II)

Fuel Type:

Unleaded Gasoline

Recommended Octane:

87 (4.0L V6, 4.7L V8), 91 (4.7L V8 HO recommended)

🔧 Transmission

Standard Trans:

42RE 4-Speed Automatic

Optional Trans:

45RFE/545RFE 4-Speed/5-Speed Automatic

Transmission Features:

Electronically controlled, torque converter lock-up, overdrive gear

Transmission Fluid Type:

ATF+4 (MS-9602)

42Re Capacity:

Approx. 9.0 qts (8.5 L)

45Rfe 545Rfe Capacity:

Approx. 10.3 qts (9.7 L)

📐 Dimensions

Wheelbase:

116.0 inches (2949 mm)

Length:

187.8 inches (4770 mm)

Width:

73.0 inches (1854 mm)

Height:

68.7 inches (1745 mm)

Ground Clearance:

Approx. 8.1 inches (206 mm)

Curb Weight Min:

4,279 lbs (1941 kg) - 4.0L 2WD

Curb Weight Max:

4,660 lbs (2114 kg) - 4.7L HO 4WD

Max Towing Capacity:

Up to 6,500 lbs (2948 kg) with appropriate equipment

🛡️ Safety Features

NHTSA Frontal Impact Driver:

★★★★☆ (4/5 Stars)

NHTSA Frontal Impact Passenger:

★★★★☆ (4/5 Stars)

IIHS Frontal Offset:

Good

ABS:

Standard Anti-lock Braking System (ABS)

Traction Control:

Optional Traction Control System (TCS)

Stability Control:

Not typically available on 2004 model year

Airbags:

Frontal airbags (driver and passenger), Optional side-impact airbags

Seatbelts:

Three-point seat belts with pretensioners for front occupants, LATCH child seat anchors

💡 Technology Features

Audio System:

Factory AM/FM/CD player, optional Infinity Gold premium sound system with amplifier and subwoofer. Cassette tape player also available.

Navigation:

Optional factory navigation system available on higher trim levels.

Cruise Control:

Standard cruise control

Parking Assist:

Not typically available

Bluetooth:

Not available from factory

Power Accessories:

Power windows, power door locks, power mirrors, power seats (driver/passenger), remote keyless entry

🔧 Maintenance

Oil Change Interval:

Every 3,000-5,000 miles (4,800-8,000 km) or 6 months, whichever comes first, depending on driving conditions. Consult manual for specific severe vs. normal service.

Transmission Fluid Change:

Every 30,000-60,000 miles (48,000-96,000 km). ATF+4 is designed for longer life, but periodic checks and changes are recommended, especially under heavy use.

Coolant Change:

Every 30,000 miles (48,000 km) or 24 months for conventional coolant, longer intervals for HOAT or OAT coolants if specified.

Spark Plug Replacement:

4.0L: Approx. 100,000 miles (160,000 km). 4.7L: Approx. 100,000 miles (160,000 km) with platinum-tipped plugs.

Engine Oil Type:

SAE 5W-30 (preferred) or 10W-30, API certified (e.g., API SN or equivalent).

Engine Oil Capacity 4.0L:

5.0 US quarts (4.7 liters) with filter

Engine Oil Capacity 4.7L:

6.0 US quarts (5.7 liters) with filter

Coolant Type:

Chrysler HOAT (Hybrid Organic Acid Technology) Pink coolant (MS-9769) or compatible equivalent.

Power Steering Fluid:

ATF+4 (MS-9602) or Mopar Power Steering Fluid (MS-5901)

Common Problems:

Headliner sagging, transmission solenoid issues (especially 42RE), catalytic converter failure, rear main seal leaks (V8), cooling system component failures (water pump, radiator, fan clutch), PCM failures (common on early WJ).

Common Problems Diag:

Worn track bar bushings, premature wear on steering components (tie rods, ball joints) due to weight and usage, potential for ABS sensor failure.

📚 Vehicle History

Jeep Legacy:

Founded on robust off-road capability and military heritage, Jeep has a long-standing reputation for durable and trail-ready vehicles.

Grand Cherokee Lineage:

The Grand Cherokee debuted in 1993 as a premium SUV offering more luxury and comfort than the Cherokee (XJ) while retaining Jeep's off-road prowess. The WJ generation (1999-2004) represented a significant redesign with a unibody construction (though often described as a 'uni-body with a robust structure') and a more refined appearance and interior.

Wj Generation Years:

1999-2004

Manufacturing Location:

Jefferson North Assembly Plant, Detroit, Michigan, USA

Sales Figures Approx:

The Grand Cherokee was a strong seller for Chrysler/DaimlerChrysler during its tenure, with annual sales often exceeding 200,000 units in the US.

🏆 Awards & Recognition

Competitor Comparisons:

The Jeep Grand Cherokee WJ was often praised for its refined ride quality and off-road capability compared to some competitors in its class during its production run. It was a significant step up in refinement from the previous ZJ generation.

Kl Motor Trend SUV Of The Year Nominee:

While not a winner in 2004, the Grand Cherokee consistently competed in SUV of the Year evaluations.