Positioning:
The Jeep Grand Cherokee WJ (1999-2004) represented Jeep's second generation of the Grand Cherokee, offering a more refined ride and increased interior space compared to its predecessor (ZJ). It competed in the premium mid-size SUV segment against vehicles like the Ford Explorer, Chevrolet Blazer/TrailBlazer, and Toyota 4Runner.
Competitors:
Ford Explorer, Chevrolet TrailBlazer, Toyota 4Runner, Nissan Pathfinder, Dodge Durango, Land Rover Discovery.
Features:
Available in 4x2 and 4x4 configurations, iconic Jeep styling, comfortable interior, capable off-road (especially with Quadra-Trac II and Quadra-Drive systems), choice of robust I6 and V8 engines.
Audience:
DIY enthusiasts, independent repair shops, and Jeep owners seeking to understand and maintain their vehicles.
Primary Coverage:
Comprehensive service, repair, and workshop procedures
Secondary Coverage:
Maintenance, diagnostics, troubleshooting, electrical schematics, specifications
Estimated Page Count:
Varies by specific manual compilation, typically over 2000 pages for a complete set.
Type:
Factory Service Manual / Workshop Manual
Format:
PDF (potentially hybrid HTML/PDF)
Powertrain:
Engine (4.0L I6, 4.7L V8), Transmission (42RE, 45RFE/45RFE/545RFE), Transfer Case (NV231, NV242, NV247, NV247-HD)
Chassis:
Suspension (front/rear), Steering, Brakes (front/rear disc, ABS), Driveline (differentials, axles, U-joints)
Electrical:
Electronic Control Modules (ECM, PCM, BCM), Ignition Control, Instrument Cluster, Lamps, Audio/Video, Horn, Power Systems, Restraints (Airbags), Speed Control, Vehicle Theft Security, Wipers/Washers, Navigation/Telecommunication, Wiring Diagrams
Body And Comfort:
Body, Frame & Bumpers, Exhaust System, Fuel System, Heating & Air Conditioning (HVAC), Emissions Control
Interior Systems:
Chime/Buzzer, Message Systems, Instrument Cluster, Heated Systems.
Engine Specific:
Emissions Control (4.0L/4.7L), Engine Systems (cooling, lubrication, ignition, fuel delivery).
Maintenance:
Lubrication, fluid changes (oil, coolant, brake, transmission, transfer case, differential), filter replacements, scheduled service intervals
Repair:
Component removal and installation, system diagnostics, troubleshooting guides, specific repair procedures for all major systems
Diagnostics:
Diagnostic trouble codes (DTCs), guided diagnostics for electrical and mechanical issues, symptom-based troubleshooting
Performance Tuning:
Basic diagnostic and tuning procedures for engine and transmission control modules.
Component Replacement:
Detailed guides for replacing major and minor components across all systems, including torque specifications for fasteners.
Depth:
Comprehensive, covering everything from basic maintenance to complex component overhauls and electrical system diagnostics. Includes detailed step-by-step instructions, diagrams, and specifications.
Electrical Diagnostics:
Extensive wiring diagrams for all circuits, component location charts, diagnostic procedures for electronic modules and sensors.
Compatibility:
Viewable on Windows, Mac OS, Linux, Tablets (Android/iOS), Smartphones. Requires Adobe Acrobat Reader (freely available).
Searchability:
Likely searchable text within the PDF, allowing for quick finding of specific topics. Some older compilations may be image-based.
Quality:
High-resolution, suitable for printing individual pages or sections for workshop use.
Binding:
Digital (PDF). No physical binding.
Paper Type:
N/A (Digital format)
Engine 1:
4.0L Inline-6 (242 cu. in.) 'Power Tech'
Engine 1 Power:
Approx. 190-205 hp @ 4600-4800 rpm (varies by year)
Engine 1 Torque:
Approx. 235-255 lb-ft @ 3200-3400 rpm (varies by year)
Engine 2:
4.7L V8 (285 cu. in.) 'Power Tech'
Engine 2 Power:
Approx. 220-235 hp @ 4700-4800 rpm (varies by year)
Engine 2 Torque:
Approx. 285-325 lb-ft @ 3200-3500 rpm (varies by year)
Fuel Delivery:
Sequential Multi-Port Fuel Injection (MPI)
Control Systems:
Catalytic converters, O2 sensors, EGR system (where applicable)
Engine Cooling:
Pressurized liquid cooling system with radiator, fan, thermostat, and water pump.
Transmission 4.0L:
42RE 4-Speed Automatic
Transmission 4.7L:
45RFE/45RFE/545RFE 4-Speed Automatic (later models)
Transfer Case Options:
NV231 (Command-Trac - 4x4), NV242 (Selec-Trac - 4x4), NV247 (Quadra-Trac II - 4x4), NV247-HD (Quadra-Drive - 4x4)
Automatic Transmission Fluid:
Chrysler ATF+4 (or equivalent specification, check manual for precise type)
Transfer Case Fluid:
Refer to manual: likely Mopar NP247 Fluid or Dexron III for NV231/NV242
Wheelbase:
Approx. 116.1 inches
Length:
Approx. 181.5 - 183.7 inches (depending on model/options)
Width:
Approx. 71.5 inches
Height:
Approx. 66.2 - 67.7 inches (depending on model/options)
Curb Weight:
Approx. 4,000 - 4,500 lbs (depending on configuration)
Towing Capacity:
Up to 6,500 lbs (with proper towing package)
Wheel Size:
Typically 16-inch or 17-inch wheels depending on trim level and options.
Tire Size:
Commonly 225/75R16, 235/65R17, or 235/70R16 depending on configuration.
Bolt Pattern:
5 x 4.5 inches (5x114.3mm)
NHTSA Front Crash Test:
Good (as per 1999-2004 IIHS/NHTSA standards for similar vehicles)
NHTSA Side Crash Test:
Acceptable/Good (depending on specific testing and year)
ABS:
Standard on most models (4-wheel disc brakes with ABS)
Traction Control:
Available (e.g., Electronic Traction Control - ETC on Quadra-Drive)
Airbags:
Driver and passenger front airbags, available side curtain airbags (later models).
Seatbelts:
Front and rear seat belts, driver and front passenger pretensioners.
Audio Systems:
Standard AM/FM/CD player, optional premium Infinity sound systems, optional cassette player, available CD changer.
Navigation:
Optional factory navigation system available on higher trim levels.
Cruise Control:
Standard cruise control system.
Parking Assist:
Rear parking assist sensors available on some models.
Remote Entry:
Available keyless entry system.
Oil Change Interval:
Typically every 3,000-7,500 miles, depending on driving conditions and oil type used (refer to manual for specific recommendations).
Coolant Change Interval:
Initial fill typically lasts longer, subsequent changes usually every 30,000-50,000 miles (or as specified for HOAT coolant).
Transmission Service Interval:
Often recommended every 30,000-50,000 miles for fluid and filter change.
Engine Oil Specification:
SAE 5W-30 or 5W-40, API Certified (check manual for exact viscosity and type recommendation for specific engine and climate).
Coolant Specification:
Chrysler HOAT (Hybrid Organic Acid Technology) Antifreeze/Coolant, typically orange or pink. Mopar brand recommended.
Brake Fluid Specification:
DOT 3 (or DOT 4 if specified for ABS systems).
Common Problems:
Cracked cylinder heads (especially early 4.7L V8), death wobble (front suspension/steering components), transfer case pump rub, radiator leaks, PCM failures, heater core leaks, ABS sensor failures, rust (especially on undercarriage and wheel wells).
Maintenance Tips:
Regularly inspect and service front suspension and steering components, monitor transmission temperatures, check for coolant leaks, address rust promptly.
Jeep Legacy:
Jeep has a long-standing reputation for off-road capability and ruggedness dating back to its military origins.
Wj Generation:
The WJ Grand Cherokee was a significant evolution from the ZJ, featuring a more car-like unibody construction (though still robust), independent front suspension for better on-road manners, and updated powertrains and interior amenities. It marked a shift towards a more premium and family-oriented SUV.
Manufacturing Location:
Jefferson North Assembly Plant, Detroit, Michigan, USA.
Production Years:
1999-2004 model years (sold from late 1998 to late 2004).
