🏷️ Basic Information

Make:

Jeep

Model:

Grand Cherokee

Generation Code:

WG

Model Years Covered:

1999, 2000, 2001, 2002, 2003, 2004

👋 Introduction

Category:

Mid-size SUV

Target Audience:

Owners and independent repair shops seeking comprehensive repair and maintenance information.

Segment Competitors:

Ford Explorer, Chevrolet TrailBlazer, Toyota 4Runner, Nissan Pathfinder, Dodge Durango.

Platform:

Jeep ZJ/WJ platform (WJ being the specific code for this generation).

Value Proposition:

Empowers DIY mechanics with factory-level diagnostic and repair procedures, enabling significant cost savings and confidence in vehicle upkeep.

📋 Manual Details

All Service And Repair:

True

Estimated Pages:

2000+

Type:

Service and Repair Manual

Language:

English

Format:

Downloadable PDF

📖 Manual Coverage

Engine Mechanical:

All engine types, internal components, cylinder heads, pistons, crankshaft, camshafts, timing systems, cooling systems, lubrication systems, engine diagnostics, tune-up procedures, emissions control.

Engine Management:

Fuel injection systems (MPI), ignition systems, electronic control units (ECU), sensors, actuators, diagnostic trouble codes (DTCs), wiring diagrams, emissions systems.

Transmission Automatic:

42RE, 45RFE, 545RFE (where applicable). Overhaul procedures, diagnostic checks, fluid specifications, torque converter, valve body, electronic controls.

Transmission Manual:

NV3500 (where applicable). Clutch system, gearbox, shift linkages, fluid specifications, repair procedures.

Drivetrain And Axles:

Front axle, rear axle, differentials (open, limited-slip), NV242/NV247 transfer cases, 4WD system operation, driveshafts, CV joints, U-joints, axle ratios.

Brakes:

Front and rear brake systems (disc/drum configurations), ABS (Anti-lock Braking System), EBD (Electronic Brake-force Distribution), brake fluid specifications, master cylinder, power booster, calipers, pads, rotors, hydraulic lines, parking brake.

Suspension And Steering:

Front independent suspension (short-long arm), rear solid axle, coil springs, shock absorbers, control arms, ball joints, tie rod ends, steering gearbox, power steering system, wheel alignment specifications.

Electrical System:

Battery, charging system (alternator), starting system (starter motor), lighting system (headlamps, taillamps, interior), fuses, relays, wiring harnesses, grounds, troubleshooting common electrical faults.

Body And Frame:

Body construction, structural components, doors, hood, tailgate, interior trim, seating systems, exterior trim, paint and body repair basics, rust prevention.

HVAC:

Heating, Ventilation, and Air Conditioning (HVAC) system, refrigerant types, A/C compressor, condenser, evaporator, blower motor, climate controls, cabin air filter replacement.

Comfort And Convenience:

Power windows, power locks, power mirrors, remote keyless entry, cruise control, seat adjustments, interior lighting, sound insulation.

Routine Maintenance:

Oil and filter changes, air filter replacement, fuel filter replacement, spark plug replacement, coolant flushes, brake fluid changes, transmission fluid changes, differential fluid changes, transfer case fluid changes.

Diagnostic Troubleshooting:

Step-by-step diagnostic procedures for engine performance, transmission issues, brake system faults, electrical problems, HVAC malfunctions, using OBD-II scan tools and interpretation of diagnostic trouble codes (DTCs).

Major Component Repair:

Engine overhaul, cylinder head repair, transmission rebuild, differential overhaul, steering system repair, suspension component replacement, brake component replacement.

Electrical System Repair:

Wiring harness repair, component testing and replacement (alternator, starter, sensors, actuators), troubleshooting shorts, open circuits, and ground issues.

Bodywork And Interior:

Panel removal and installation, trim piece replacement, glass replacement procedures, seat removal and installation, basic dent repair guidance.

Specification And Data:

Torque specifications for all fasteners, fluid capacities, viscosity grades, diagnostic parameters, alignment settings, engine specifications.

Depth:

Comprehensive. Covers everything from basic preventative maintenance to complete engine and transmission overhauls, including detailed troubleshooting guides and electrical schematics.

📊 Manual Specifications

Format:

PDF (Portable Document Format)

Searchability:

Fully searchable text for quick information retrieval.

Printability:

Printable pages for in-garage use.

Image Resolution:

High-resolution diagrams and illustrations.

Binding:

N/A (Digital Download)

Paper Quality:

N/A (Digital Download)

⚙️ Engine Specifications

Engine Code:

4.7L V8 (PowerTech)

Displacement:

4.7 Liters / 285 Cubic Inches

Configuration:

SOHC V8

Horsepower Approx:

235 hp @ 4500 RPM

Torque Approx:

295 lb-ft @ 3200 RPM

Fuel System:

Multi-point Fuel Injection (MPI)

Engine Block Material:

Iron block, Aluminum heads

Engine Code:

4.0L Inline-6 (PowerTech)

Displacement:

4.0 Liters / 242 Cubic Inches

Configuration:

OHV Inline-6

Horsepower Approx:

190-195 hp @ 4600 RPM

Torque Approx:

235 lb-ft @ 3200 RPM

Fuel System:

Multi-point Fuel Injection (MPI)

Engine Block Material:

Cast Iron block and head

🔧 Transmission

Type:

45RFE / 545RFE 4-Speed Automatic

Type:

42RE 4-Speed Automatic

Type:

NV3500 5-Speed Manual

Overdrive:

All automatic transmissions feature overdrive (4th gear).

Automatic Transmission Fluid:

ATF+4 (MS-9602)

Manual Transmission Fluid:

Mopar Manual Transmission Lubricant (or equivalent GL-3/GL-4 SAE 75W-90)

📐 Dimensions

Length:

Approx. 184.0 inches

Width:

Approx. 72.4 inches

Height:

Approx. 67.0 - 68.0 inches

Wheelbase:

116.0 inches

Curb Weight Approx:

4,200 - 4,700 lbs (depending on configuration)

Cargo Behind Rear Seat:

Approx. 37.7 cubic feet

Max Cargo Volume:

Approx. 70.5 cubic feet

🛡️ Safety Features

NHTSA Front Impact:

4 stars (driver and passenger)

NHTSA Side Impact:

4 stars (front passenger)

ABS:

Standard 4-wheel Anti-lock Braking System (ABS).

Traction Control:

Optional Traction Control System (TCS) on some models.

Airbags:

Standard front airbags, optional side airbags available on some later models.

Seatbelts:

Three-point seatbelts with pretensioners for front occupants.

💡 Technology Features

Audio System:

AM/FM stereo with CD player, optional Infinity Gold premium audio system, optional CD changer.

Navigation:

Optional factory navigation system available on higher trims.

Rear Entertainment:

Optional rear-seat entertainment system with video cassette player or DVD player.

Cruise Control:

Standard cruise control.

Parking Sensors:

Optional rear parking assist sensors.

Remote Keyless Entry:

Available remote keyless entry system.

Power Accessories:

Power windows, power door locks, power mirrors standard on most trims.

🔧 Maintenance

Oil Change Interval:

Every 3,000 - 7,500 miles (depending on oil type and driving conditions, refer to manual for specific recommendation).

Oil Filter Part Number Example:

Mopar MO-090 or equivalent (e.g., Fram PH8A, Wix 51515)

Engine Oil Capacity 4.0L:

5 Quarts (4.7 Liters) with filter (API SL, SAE 10W-30 or 10W-40 recommended for most climates, check manual).

Engine Oil Capacity 4.7L:

6 Quarts (5.7 Liters) with filter (API SL, SAE 5W-30 recommended, check manual).

Air Filter Replacement:

Every 15,000 - 30,000 miles or as needed based on conditions.

Cabin Air Filter Replacement:

Every 15,000 - 30,000 miles or annually.

Transmission Fluid Change Interval:

Every 30,000 - 60,000 miles for automatic transmission (ATF+4).

Coolant Type:

Mopar HOAT Antifreeze/Coolant (or equivalent ethylene glycol based with corrosion inhibitors).

Coolant Capacity:

Approx. 12-14 Quarts (11.4-13.2 Liters).

Brake Fluid Type:

DOT 3

Engine 4.0L Cracking:

Cracking of the cylinder head (common on earlier 4.0L engines, though less prevalent in later WG models than earlier ZJs) can occur due to overheating or casting flaws. Monitor coolant levels closely.

Engine 4.7L Oil Sludge:

Potential for oil sludge buildup if oil changes are neglected, especially if using conventional oil. Using synthetic and regular oil changes is crucial.

Transmission 42Re Overheating:

The 42RE can be prone to overheating under heavy load or towing. Ensuring proper cooling system maintenance and considering an auxiliary transmission cooler is advisable.

Transfer Case Nv247 Cold Start Noise:

The Quadra-Drive NV247 transfer case can sometimes exhibit a clunk or grinding noise on cold starts. Often a symptom of low or degraded fluid, or internal clutch pack wear.

Suspension Components:

Wear on ball joints, tie rod ends, and control arm bushings is common with age and mileage, affecting steering and alignment.

Radiator Leaks:

Plastic end tanks on the radiator can develop leaks over time.

📚 Vehicle History

Jeep Legacy:

Jeep has a long-standing reputation for ruggedness, off-road capability, and durability since its inception during WWII.

Wg Generation:

The WG is the second generation of the Grand Cherokee, succeeding the ZJ. It introduced a more refined ride, improved interior quality, and updated powertrains, while retaining Jeep's off-road prowess.

Key Changes Wg:

Unibody construction, independent front suspension, updated engine options (4.0L I6 and 4.7L V8), redesigned interior and exterior aesthetics, available rear-seat entertainment system.

Manufacturing Location:

Detroit, Michigan, USA

Production Years:

1999-2004

🏆 Awards & Recognition

4X4 Of The Year:

The Grand Cherokee consistently received accolades for its off-road capability, often being named a '4x4 of the Year' by various publications during its lifespan.

Kl Safety Rating:

The WG generation generally performed well in safety tests for its era, though modern standards are more stringent. The manual provides detailed safety system operation and troubleshooting.

Manual Certification:

Factory-authorized repair procedures, ensuring accuracy and compliance with OEM standards.