🏷️ Basic Information

Make:

Jeep

Model:

Grand Cherokee

Chassis Code:

WJ

Product Type:

Service and Repair Manual

👋 Introduction

Description:

The Jeep Grand Cherokee WJ was positioned as a premium mid-size SUV, known for its off-road capability and comfortable ride, competing with vehicles like the Ford Explorer, Chevrolet Blazer, and Toyota 4Runner.

Key Competitors:

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

Distinctive Attributes:

Unibody construction (compared to body-on-frame predecessors), available Quadra-Drive 4WD system, upscale interior appointments for its class.

📋 Manual Details

Model Years Covered:

1999, 2000, 2001, 2002, 2003, 2004

Engine Variants Covered:

All engine variants

Trim Levels Covered:

All trim levels

Estimated Page Count:

Thousands (Comprehensive Official Manual)

Type:

Official Factory Service Manual

Language:

English

Format:

PDF

📖 Manual Coverage

Engine Mechanical:

Detailed diagnostics, repair procedures, overhaul, timing, lubrication, cooling systems for all WJ engines.

Engine Performance:

Fuel injection, ignition system, emissions control, diagnostics for performance issues.

Transmission Automatic:

Diagnostics, repair, overhaul, fluid specifications, control systems for 42RE, 45RFE, 545RFE transmissions.

Transmission Manual:

Diagnostics, repair, overhaul for NV3500 manual transmission (if equipped).

Drivetrain:

Four-wheel drive systems (Selec-Trac, NV242, NV247, NV249 transfer cases), differentials, axles, driveshafts, CV joints.

Brakes:

Hydraulic system, ABS, EBD, parking brake, brake rotor and pad replacement, caliper service, bleeding procedures.

Suspension:

Front and rear suspension components (control arms, ball joints, bushings, springs, shock absorbers), alignment specifications.

Steering:

Power steering system, steering gear, tie rods, steering column, alignment.

Electrical System:

Battery, charging system, starting system, lighting, fuses, relays, wiring diagrams, power distribution.

Body And Chassis:

Frame, body panels, doors, glass, interior trim, bumpers, tailgate, seat mechanisms.

HVAC:

Heating, ventilation, air conditioning system diagnostics, repair, refrigerant handling, component replacement.

Interior Appointments:

Seats, seat belts, airbags, dashboard, console, sound insulation.

Exterior Trim:

Grille, headlights, taillights, mirrors, roof rack, wheel covers.

Diagnostic Troubleshooting:

Systematic troubleshooting guides, symptom-based diagnostics, error code interpretation.

Routine Maintenance:

Oil changes, filter replacements, fluid checks, tire rotations, spark plug replacement.

Component Replacement:

Detailed step-by-step instructions for replacing major components (engine, transmission, suspension, brakes, etc.).

Rebuilding Overhauling:

Complete overhaul procedures for engines and transmissions.

Diagnosis And Testing:

Procedures for testing electrical circuits, fuel system components, sensor outputs, and mechanical systems.

Wiring Diagrams:

Comprehensive electrical wiring diagrams for all vehicle systems, including power distribution and component locations.

Special Tools:

Identification and usage of special tools required for specific repair procedures.

Torque Specifications:

Precise torque values for all critical fasteners.

Depth:

Comprehensive, from basic maintenance to complete engine and transmission overhauls and advanced electrical diagnostics.

📊 Manual Specifications

Type:

PDF

Searchable:

Yes

Printable:

Yes

Quality:

High-resolution, clear text and diagrams

N A:

N/A (Digital PDF)

N A:

N/A (Digital PDF)

N A:

N/A (Digital PDF)

⚙️ Engine Specifications

Engine 1:

4.0L Inline-6 (PowerTech)

Engine 1 Code:

AMC 242

Engine 1 Displacement:

3957 cc (242 cu in)

Engine 1 Horsepower:

190 hp @ 4600 rpm (approx.)

Engine 1 Torque:

235 lb-ft @ 3200 rpm (approx.)

Engine 1 Bore X Stroke:

3.875 in x 3.563 in (98.4 mm x 90.5 mm)

Engine 1 Compression Ratio:

8.8:1

Engine 2:

4.7L V8 (PowerTech)

Engine 2 Code:

5.2L Magnum (early WJ, replaced by 4.7L), later 4.7L HO

Engine 2 Displacement:

4701 cc (287 cu in)

Engine 2 Horsepower:

220 hp @ 4700 rpm (standard 4.7L), 235 hp @ 4700 rpm (4.7L HO)

Engine 2 Torque:

285 lb-ft @ 3200 rpm (standard 4.7L), 300 lb-ft @ 3400 rpm (4.7L HO)

Engine 2 Bore X Stroke:

3.88 in x 3.31 in (98.5 mm x 84.2 mm)

Engine 2 Compression Ratio:

9.0:1 (standard 4.7L), 9.7:1 (4.7L HO)

Type:

Multi-point Fuel Injection (MPI)

Fuel Type:

Unleaded Gasoline

Ignition System:

Distributorless Ignition System (DIS) with coil-on-plug (for 4.7L V8) or distributor system (for 4.0L I6).

🔧 Transmission

Transmission Type:

42RE 4-Speed Automatic (common with 4.0L I6)

Transmission Type 1:

45RFE/545RFE 4-Speed Automatic (common with 4.7L V8)

Transmission Type 2:

NV3500 5-Speed Manual (Rare option)

Overdrive:

Yes (4th gear)

Transfer Case Options:

NV231 (Selec-Trac), NV242, NV247 (Quadra-Trac II), NV249 (Quadra-Trac, early models)

42Re Fluid:

ATF+4 (MS-9602)

45Rfe 545Rfe Fluid:

ATF+4 (MS-9602)

📐 Dimensions

Wheelbase:

116.0 inches (2946 mm)

Length:

181.5 inches (4610 mm)

Width:

71.5 inches (1816 mm)

Height:

67.4 inches (1712 mm)

Passenger Volume:

Approximately 105 cu ft

Cargo Volume Behind Rear Seat:

Approximately 37 cu ft

Cargo Volume With Rear Seat Folded:

Approximately 77 cu ft

Curb Weight:

4,100 - 4,600 lbs (approx.)

Gvw:

5,500 - 5,800 lbs (approx.)

Towing Capacity:

Up to 5,000 lbs (with optional towing package)

Wheel Bolt Pattern:

5 x 4.5 inches (5x114.3 mm)

Standard Tire Size:

P225/75R16, P235/70R16

Optional Tire Size:

P245/65R17

🛡️ Safety Features

NHTSA Frontal Driver Impact:

Not explicitly rated for all model years, but generally considered good for its era.

NHTSA Frontal Passenger Impact:

Not explicitly rated for all model years.

ABS:

Standard (Anti-lock Braking System)

Ebd:

Standard (Electronic Brake-force Distribution)

Traction Control:

Optional (based on 4WD system, e.g., Quadra-Trac II)

Airbags:

Standard front airbags. Optional side airbags (later models).

Seatbelts:

3-point lap and shoulder belts in all outboard seating positions.

Rollover Protection:

Built-in safety cage construction.

💡 Technology Features

Available Systems:

AM/FM stereo with CD player, optional premium Infinity sound system, optional navigation system (later models).

ABS:

Standard

Traction Control:

Optional

Aux Input:

Not standard; aftermarket solutions available.

Bluetooth:

Not available from factory; aftermarket solutions available.

🔧 Maintenance

Oil Change Interval:

Every 5,000-7,500 miles (8,000-12,000 km) or 6 months, depending on driving conditions.

Engine Air Filter:

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

Cabin Air Filter:

Replace annually or every 15,000 miles (24,000 km).

Spark Plugs:

Inspect around 30,000 miles (48,000 km), replace around 60,000-100,000 miles (96,000-160,000 km) depending on plug type.

Transmission Fluid:

Change every 30,000-60,000 miles (48,000-96,000 km), depending on usage (ATF+4 recommended).

Coolant Flush:

Every 30,000 miles (48,000 km) or 2-3 years.

Engine Oil:

SAE 5W-30 (API certified, meeting MS-6395 specification)

Coolant:

Chrysler/Dodge/Jeep HOAT (Hybrid Organic Acid Technology) or equivalent, 50/50 mix with distilled water.

Brake Fluid:

DOT 3

Power Steering Fluid:

ATF+4 or equivalent Mopar power steering fluid.

Cooling System:

Cracked plastic heater manifolds, thermostat housing leaks, radiator issues.

Engine 4.0L:

Cracked cylinder heads (early models), oil filter adapter housing leaks, valve cover gasket leaks.

Engine 4.7L:

Cracked cylinder heads (particularly on 2000-2002 models), oil sludge buildup if not maintained, intake manifold gasket leaks.

Transmission 45Rfe 545Rfe:

Slipping, rough shifting (often due to low fluid or solenoid issues), torque converter issues.

Electrical:

Window regulator failures, HVAC blower motor issues, ABS sensor failures, Instrument cluster problems.

Suspension Steering:

Worn ball joints, tie rod ends, control arm bushings, steering damper failure.

📚 Vehicle History

Jeep Legacy:

Jeep has a storied history rooted in military vehicles, evolving into a brand synonymous with off-road capability and ruggedness.

Wj Generation:

The WJ generation replaced the ZJ Grand Cherokee and introduced a more refined and upscale experience while retaining Jeep's core SUV strengths. It featured significant upgrades in interior design and available technology.

Mj Generation Predecessor:

ZJ Grand Cherokee (1993-1998)

Wk Generation Successor:

WK Grand Cherokee (2005-2010)

Production Years:

1999-2004

Assembly Location:

Jefferson North Assembly Plant, Detroit, Michigan, USA.

🏆 Awards & Recognition

Typical Accolades:

Often praised for its off-road capability and comfortable, quiet ride compared to some rivals of its era. Awarded by various automotive publications for its segment performance.

Ican Ratings:

The manual provides detailed specifications and procedures, making it invaluable for DIY enthusiasts and professional mechanics alike. It facilitates optimal maintenance and repair, directly contributing to the vehicle's longevity and performance.