Market Segment:
Mid-size Luxury SUV
Target Audience:
Owners seeking to perform DIY maintenance and repairs, independent repair shops.
Competitors:
Ford Explorer, Chevrolet Blazer/TrailBlazer, Toyota 4Runner, Nissan Pathfinder, Land Rover Discovery.
Vehicle Strengths:
Off-road capability, comfortable ride, spacious interior, V8 engine option, towing capacity.
Manual Value Proposition:
Provides detailed, accurate information for maintaining and repairing the Jeep Grand Cherokee WJ, saving significant costs compared to dealership service.
Instant Download Benefit:
Immediate access to critical repair information without shipping delays or costs.
Engine Mechanical:
Engine assembly, cylinder head, block, crankshaft, pistons, connecting rods, timing system, lubrication, cooling.
Engine Performance:
Fuel delivery, ignition system, emissions control, turbocharging (if applicable).
Transmission Manual:
Manual transmission servicing, clutch, gearbox assembly, driveshafts.
Transmission Automatic:
Automatic transmission servicing, torque converter, valve body, planetary gears, transmission control module (TCM).
Drivetrain:
Transfer case (NV242, NV247), differentials (front and rear), axles, CV joints, driveshafts.
Brakes:
Hydraulic system, ABS, brake calipers, rotors, pads, master cylinder, power booster, parking brake.
Suspension:
Front and rear suspension, control arms, ball joints, steering knuckles, springs, shock absorbers, bushings.
Steering:
Power steering system, steering gear, tie rods, steering column, steering wheel.
Electrical System:
Battery, charging system (alternator), starting system (starter motor), wiring diagrams, lighting, fuses, relays.
Body And Frame:
Body panel removal and installation, interior trim, exterior trim, structural components, chassis.
HVAC:
Heating, Ventilation, and Air Conditioning system, compressor, condenser, evaporator, climate control module.
Interior Systems:
Seats, airbags, seat belts, power windows, power locks, sunroof, dashboard assembly.
Routine Maintenance:
Oil changes, filter replacements, fluid checks and top-offs, tire rotation, brake inspection.
Diagnostic Troubleshooting:
Systematic diagnosis of common and uncommon problems, DTC (Diagnostic Trouble Code) interpretation.
Repair Procedures:
Step-by-step instructions for component removal, repair, and reinstallation.
Overhaul Rebuild:
Complete disassembly and reassembly procedures for major components like engines and transmissions.
Wiring Diagrams:
Detailed electrical circuit diagrams for all vehicle systems.
Special Tools:
Identification and usage of specialized tools required for specific repairs.
Depth Of Coverage:
Comprehensive, covering all aspects from basic maintenance to complete engine and transmission rebuilds.
Diagnostic Capabilities:
Advanced diagnostic procedures, including symptom-based troubleshooting and component testing.
Torque Specifications:
Precise torque values for all critical fasteners.
Clearances Tolerances:
Engine component clearances, bearing tolerances, and other critical measurements.
Engine 1 Code:
4.0L Inline-6 (PowerTech)
Engine 1 Displacement:
3956 cc (241.5 cu in)
Engine 1 Bore X Stroke:
98.5 mm x 86.6 mm (3.88 in x 3.41 in)
Engine 1 Compression Ratio:
8.8:1
Engine 1 Horsepower:
190-195 hp @ 4600 rpm (depending on year)
Engine 1 Torque:
235-237 lb-ft @ 3200 rpm (depending on year)
Engine 2 Code:
4.7L V8 (PowerTech)
Engine 2 Displacement:
4701 cc (286.9 cu in)
Engine 2 Bore X Stroke:
93.0 mm x 86.1 mm (3.66 in x 3.39 in)
Engine 2 Compression Ratio:
9.6:1
Engine 2 Horsepower:
220-235 hp @ 4700-4900 rpm (depending on year)
Engine 2 Torque:
295-325 lb-ft @ 3200-3500 rpm (depending on year)
Induction Type:
Naturally Aspirated (MPI - Multi-Point Fuel Injection)
Fuel Type:
Unleaded Gasoline
Fuel Octane Rating:
87 Octane (Minimum, 89 recommended for V8 for optimal performance)
Transmission Type 4.0L:
4-Speed Automatic (42RE)
Transmission Type 4.7L:
4-Speed Automatic (45RFE/545RFE)
Transmission Manual Option:
None offered for WJ generation in North America.
Transfer Case Options:
Selec-Trac (NV242), Quadra-Drive (NV247)
Transmission Fluid Spec 42Re:
ATF+4 (Chrysler Mopar material number 05013457AA or equivalent)
Transmission Fluid Spec 45Rfe/545Rfe:
ATF+4 (Chrysler Mopar material number 05013457AA or equivalent)
Engine Oil Change Interval:
Every 3,000-7,500 miles (10W-30 or 5W-30 depending on temperature and engine, refer to manual for specifics)
Engine Oil Filter Replacement:
With every oil change.
Coolant Flush Interval:
Every 30,000-60,000 miles or 3-5 years (HOAT coolant recommended)
Transmission Fluid Change Interval:
Every 30,000-60,000 miles (depending on driving conditions, ATF+4)
Spark Plug Replacement 4.0L:
Approx. 100,000 miles (typically Champion copper or platinum)
Spark Plug Replacement 4.7L:
Approx. 100,000 miles (typically Champion platinum or iridium)
Engine Oil Specification:
SAE 10W-30 (below 0°F), SAE 10W-30 (0°F to 80°F), SAE 5W-30 (below -20°F) - Check manual for precise recommendations.
Coolant Specification:
Chrysler HOAT (Hybrid Organic Acid Technology) Extended Life Antifreeze/Coolant, Type MS-9769 (Orange)
Brake Fluid Specification:
DOT 3
Power Steering Fluid:
Chrysler Mopar Power Steering Fluid or equivalent (ATF+4 may be used in some cases, verify)
Common Issue Cracked Cylinder Heads 4.7L:
Certain 4.7L V8 engines are prone to cracked cylinder heads, especially around exhaust ports. Early detection and replacement is crucial.
Common Issue Radiator Leaks:
Plastic end tanks on radiators can crack or leak over time.
Common Issue Water Pump Failures:
Water pumps can develop leaks or fail, particularly the 4.7L V8.
Common Issue Transfer Case Chain Stretch:
The transfer case chain in Quadra-Drive (NV247) systems can stretch, leading to clunking noises and performance issues.
Common Issue Wheel Speed Sensor Failures:
ABS and traction control issues often stem from failing wheel speed sensors.
Common Issue Ignition Coil Failures:
Individual ignition coils can fail, causing misfires.
Jeep Legacy:
Jeep is a brand with a long history of off-road capability and utility vehicles, dating back to WWII.
Wj Generation Introduction:
Introduced for the 1999 model year, replacing the ZJ Grand Cherokee. Featured a redesigned interior and exterior, and improved NVH (Noise, Vibration, and Harshness).
Wj Updates:
Facelift in 2004 included revised front and rear styling, updated interior materials, and engine enhancements (e.g., 545RFE transmission for V8).
Production Location:
Jefferson North Assembly Plant, Detroit, Michigan, USA
Production Years:
1999-2004