🏷️ Basic Information

Make:

Jeep

Model:

Grand Cherokee

Product Type:

Service and Repair Manual

Chassis Code:

WJ

Model Years Covered:

2002, 2003, 2004

👋 Introduction

Vehicle Segment:

Mid-size/Full-size SUV

Target Audience:

Jeep owners seeking to perform their own maintenance and repairs, independent repair shops, automotive technicians.

Key Competitors:

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

Vehicle Usp:

Renowned off-road capability, comfortable ride for an SUV of its era, powerful engine options, spacious interior.

Manual Value Proposition:

Provides technicians and DIYers with the exact, detailed information required for accurate diagnosis and repair, saving time and money compared to generic guides.

📋 Manual Details

Coverage Scope:

All models and all repairs A-Z

Information Source:

Vehicle-specific, dealership technician manual equivalent

Estimated Page Count:

Refer to actual product listing for precise page count; typically 1000+ pages for comprehensive service manuals.

Manual Type:

Service and Repair Manual

Language:

English

Format:

Digital (likely PDF) or Printed

📖 Manual Coverage

Engine Systems:

Engine mechanical, lubrication, cooling, fuel, ignition, emissions, starting, charging, engine control module (ECM), diagnosis and testing.

Transmission Systems:

Automatic transmission (e.g., 42RE, 45RFE, 545RFE) service, repair, overhaul, diagnosis, and fluid specifications.

Drivetrain Systems:

Four-wheel drive (4WD) system, transfer case operation and service, propeller shafts, drive shafts, axles, differentials (front and rear), CV joints.

Suspension Steering:

Front and rear suspension components (e.g., control arms, ball joints, tie rod ends, shocks/struts, coil springs), steering gear, power steering system, alignment specifications.

Braking Systems:

Front and rear brake systems (disc/drum), anti-lock braking system (ABS), brake fluid specifications, hydraulic system diagnosis and repair, parking brake.

Electrical Systems:

12-volt electrical system, battery, charging system, starting system, lighting, instrument panel, gauges, power windows, locks, mirrors, wipers, horns, wiring diagrams, fuse and relay information.

Body Chassis:

Body construction, exterior panels, doors, hood, tailgate, interior trim, HVAC system, heating, ventilation, air conditioning (A/C) system operation and service, chassis lubrication.

Diagnostics Troubleshooting:

Diagnostic trouble codes (DTCs), symptom-based troubleshooting, electrical diagnostic procedures, wiring schematics, component testing.

Maintenance Procedures:

Oil changes, filter replacements, fluid level checks and top-offs, spark plug replacement, belt inspection and replacement, brake pad/shoe replacement, tire rotation.

Repair Procedures:

Detailed step-by-step instructions for component removal, installation, overhaul, and adjustment for all major systems.

Troubleshooting Guides:

Systematic approaches to diagnosing and resolving common and complex mechanical and electrical faults.

Specifications Data:

Torque specifications for fasteners, fluid capacities, critical clearances, electrical resistance values, diagnostic parameters.

Depth Of Coverage:

Comprehensive; covers basic maintenance to complete engine and transmission rebuilds, advanced electrical diagnostics, and body repair.

Diagnostics Capability:

Includes specific diagnostic procedures, testing strategies, and interpretation of diagnostic trouble codes (DTCs).

📊 Manual Specifications

Digital File Type:

Typically PDF with search functionality and bookmarking for easy navigation.

Print Quality Digital:

High resolution, clear text and diagrams, suitable for printing individual pages or sections.

Binding Type Print:

Likely coil-bound or spiral-bound for lay-flat usability in a workshop environment.

Paper Type Print:

Durable, often heavyweight paper to withstand workshop conditions.

⚙️ Engine Specifications

Engine Option 1:

4.0L (3956cc) I6 'PowerTech'

Engine Option 1 Horsepower:

Approx. 190-195 hp @ 4600 rpm

Engine Option 1 Torque:

Approx. 235 lb-ft @ 3200 rpm

Engine Option 2:

4.7L (4701cc) V8 'PowerTech'

Engine Option 2 Horsepower:

Approx. 235-260 hp @ 4800-5200 rpm (depending on year/variant)

Engine Option 2 Torque:

Approx. 295-325 lb-ft @ 3200-3400 rpm (depending on year/variant)

Compression Ratio 4.0L:

8.75:1

Bore Stroke 4.0L:

3.875 in x 3.410 in (98.4 mm x 86.6 mm)

Compression Ratio 4.7L:

9.3:1

Bore Stroke 4.7L:

3.70 in x 3.40 in (94.0 mm x 86.4 mm)

Fuel Delivery:

Multi-port fuel injection (MPFI)

Recommended Fuel:

87 octane unleaded gasoline (premium may provide slight performance benefit for 4.7L V8)

🔧 Transmission

Transmission Option 1:

4-speed Automatic 42RE (primarily with 4.0L I6 in earlier WJ models, though some may carry over)

Transmission Option 2:

4-speed Automatic 45RFE (with 4.0L I6 in later WJ models)

Transmission Option 3:

5-speed Automatic 545RFE (primarily with 4.7L V8)

Transfer Case:

Selec-Trac (part-time 4WD with 2WD option) or Quadra-Drive (full-time 4WD with electronic limited-slip differentials).

Transmission Fluid Spec 42Re:

ATF+3 (or ATF+4)

Transmission Fluid Spec 45Rfe:

ATF+4

Transmission Fluid Spec 545Rfe:

ATF+4

📐 Dimensions

Wheelbase:

109.4 inches (2779 mm)

Length:

183.7 inches (4666 mm)

Width:

74.1 inches (1882 mm)

Height:

66.9 inches (1699 mm)

Passenger Volume:

Approx. 105.0 cubic feet (2973 L)

Cargo Volume Behind 2Nd Row:

Approx. 39.0 cubic feet (1104 L)

Cargo Volume Max:

Approx. 77.0 cubic feet (2180 L)

Curb Weight:

Approx. 4,200 - 4,600 lbs (1905 - 2087 kg), varies by configuration.

Towing Capacity:

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

🛡️ Safety Features

NHTSA Frontal Impact Driver:

Likely 4 stars (based on typical ratings for this era and class, refer to specific test data for exact ratings).

NHTSA Frontal Impact Passenger:

Likely 4 stars.

ABS:

Standard Anti-lock Braking System (ABS)

Traction Control:

Optional or standard on certain trims (e.g., Traction Control System - TCS).

Airbags Front:

Standard front driver and passenger airbags.

Airbags Side:

Optional front seat-mounted side airbags on some trims.

Rollover Protection:

Designed with enhanced structural integrity for SUV rollover resistance, though specific testing results vary.

💡 Technology Features

Audio System:

Optional premium audio systems with CD player, cassette player, and AM/FM radio. SiriusXM satellite radio became available.

Navigation:

Optional factory navigation system.

Cruise Control:

Standard cruise control system.

Rear Entertainment:

Optional rear-seat entertainment system with video screens and headphones available on higher trims.

🔧 Maintenance

Oil Change Interval:

Every 3,000 - 7,500 miles (5,000 - 12,000 km) or 6-12 months, depending on driving conditions and oil type used (consult manual for specific recommendations).

Transmission Fluid Change:

Typically every 30,000 - 60,000 miles (48,000 - 96,000 km) or as specified by severe service conditions.

Coolant Flush:

Every 30,000 - 100,000 miles (48,000 - 160,000 km) or 2-5 years, depending on coolant type.

Engine Oil 4.0L:

SAE 10W-30 (check owner's manual for exact viscosity and API classification, e.g., API SN or higher).

Engine Oil 4.7L:

SAE 5W-30 (check owner's manual for exact viscosity and API classification).

Coolant Type:

Chrysler HOAT (Hybrid Organic Additive Technology) coolant (often Mopar Antifreeze/Coolant 5-Year/100,000 Mile Formula) or equivalent with a 50/50 mix of coolant and distilled water.

Brake Fluid:

DOT 3 or DOT 4 brake fluid.

Engine 4.7L Cracking:

Some 4.7L V8 engines from this era have been known to develop cylinder head cracks, particularly around the spark plug holes. This is a critical repair detailed in the manual.

Overheating Cooling System:

Potential for cooling system issues including radiator leaks, water pump failure, and hose degradation. Regular inspection and maintenance are key.

Transmission Slipping:

Some transmission models (especially earlier ones) can exhibit slipping or rough shifting due to worn clutches, valve body issues, or low fluid levels/quality. Regular fluid and filter changes are crucial.

Transfer Case Actuator:

The electronic shift motor for the transfer case can fail, leading to 4WD system issues. Diagnosis and replacement procedures will be covered.

Power Steering Pump:

Premature failure of the power steering pump or leaks in the system are not uncommon. The manual will detail troubleshooting and replacement.

📚 Vehicle History

Jeep Legacy:

Jeep has a storied history dating back to WWII, renowned for its ruggedness, off-road capability, and 4x4 systems.

Wj Generation Intro:

The WJ generation of the Grand Cherokee was introduced for the 1999 model year, representing a significant redesign from the ZJ generation, focusing on improved on-road comfort and refinement while retaining off-road prowess.

Wj Mid Cycle Refresh:

The 2002 model year marked a significant mid-cycle refresh for the WJ, introducing updated styling (front/rear fascia, headlights, taillights), interior enhancements, and powertrain revisions, including the introduction/refinement of the 4.7L V8 and the 545RFE transmission.

Manufacturing Location:

Detroit, Michigan, USA (Jefferson North Assembly Plant).

🏆 Awards & Recognition

Four Wheeler Magazine Title:

The Grand Cherokee, particularly its off-road variants, has historically been well-regarded by off-road publications like Four Wheeler Magazine.

Car And Driver Ranking:

Often featured in comparison tests and '10Best' lists for SUVs during its production run, recognized for its blend of capability and comfort.