Positioning:
Premium, capable SUV with significant off-road heritage. The WJ generation introduced more refinement and luxury compared to its predecessors.
Competitors:
Ford Explorer, Chevrolet Blazer, Toyota 4Runner, Land Rover Discovery
Features:
Robust four-wheel-drive systems (Quadra-Trac II, Quadra-Drive), comfortable ride, spacious interior, strong towing capacity, upscale amenities for its class.
Value:
Provides comprehensive factory-level repair and maintenance information, enabling DIY owners or independent shops to service the vehicle effectively, saving on dealership costs.
Powertrain:
Engine, Fuel System, Exhaust System, Cooling System, Drivetrain, Transmission, Transfer Case
Chassis:
Suspension (Front & Rear), Steering, Brakes, Wheels & Tires
Electrical:
Body Electrical Systems, Lighting, Instrumentation, Powertrain Control Module (PCM), Antilock Braking System (ABS), Airbag System, HVAC Controls
Body:
Body Construction, Doors, Windows, Seats, Interior Trim, Exterior Trim, Bumpers, Roof
Maintenance:
Scheduled Maintenance, Fluid Changes, Filter Replacements, Lubrication, Inspections
Repair:
Component Removal and Installation, Component Overhaul and Reassembly, Diagnosis and Troubleshooting
Diagnostics:
Diagnostic Trouble Codes (DTCs), Wiring Diagrams, Component Testing, Flowcharts
Troubleshooting:
Systematic Fault Finding, Symptom-Based Diagnosis, Common Issues and Solutions
Depth:
Comprehensive Factory-Level Detail, Including Specifications, Tolerances, Torque Values, Wiring Diagrams, Diagnostic Procedures, and Repair Techniques
Engine Options:
4.0L Inline-6 (242 ci) 'PowerTech' (MPI) and 4.7L V8 (287 ci) 'PowerTech' (MPI)
4.0L Inline 6 Horsepower:
Approx. 190 hp @ 4600 rpm
4.0L Inline 6 Torque:
Approx. 235 lb-ft @ 3200 rpm
4.7L V8 Horsepower:
Approx. 235 hp @ 4500 rpm (early models), 260 hp @ 4500 rpm (later models)
4.7L V8 Torque:
Approx. 295 lb-ft @ 3200 rpm (early models), 325 lb-ft @ 3250 rpm (later models)
Fuel Delivery:
Multi-Point Fuel Injection (MPI)
Recommended Fuel:
87 Octane (Regular Unleaded) for 4.0L; 89 Octane (Mid-Grade Unleaded) recommended for 4.7L V8
Coolant Type:
Chrysler HOAT (Hybrid Organic Acid Technology) - Mopar OAT is generally backward compatible but consult manual for precise specification.
Oil Type 4.0L:
SAE 10W-30 (API Service SG or higher)
Oil Type 4.7L:
SAE 5W-30 (API Service SG or higher)
4.0L Engine Code:
ERH (AMC 242)
4.7L Engine Code:
EVE (Chrysler Magnum V8)
4.0L Transmission:
42RE 4-Speed Automatic
4.7L Transmission:
45RFE 4-Speed Automatic (later upgraded to 545RFE 5-Speed)
Manual Transmission:
Not typically offered on WJ Grand Cherokee in North America for 1999.
Transfer Case Options:
Selec-Trac (NV242) Full-Time 4WD, Command-Trac (NV242) Part-Time 4WD (less common), Quadra-Trac II (NV247) Full-Time 4WD with electronic full-time mode, Quadra-Drive (NV247 with Tru-Lok differentials)
Automatic Transmission Fluid:
ATF+3 (MS-7176E) for 42RE; ATF+4 (MS-9602) recommended for 45RFE/545RFE, though ATF+3 is often specified initially.
NHTSA Front Crash Rating:
4-star driver, 4-star passenger (for 1999 model)
ABS:
Standard Anti-lock Braking System (ABS)
Traction Control:
Available on some trims, especially with Quadra-Drive
Airbags:
Standard front driver and passenger airbags
Seatbelts:
Front: 3-point, height-adjustable; Rear: 3-point belts for all seating positions
Audio System:
Optional premium audio systems available, including Infinity Gold sound system with subwoofer.
Navigation:
Optional factory navigation system available on higher trims.
Power Accessories:
Power windows, power locks, power mirrors standard on most trims.
HVAC:
Manual or automatic climate control systems available, with optional dual-zone climate control.
Oil Change Interval:
Every 5,000 - 7,500 miles (8,000 - 12,000 km) or 6 months, whichever comes first (consult manual for specific mileage/time and severe service intervals).
Transmission Fluid Change Interval:
Every 30,000 - 60,000 miles (48,000 - 96,000 km) depending on driving conditions and fluid type used (ATF+3 vs ATF+4). Consult manual for precise recommendation.
Coolant Change Interval:
Initial change at 100,000 miles (160,000 km), then every 50,000 miles (80,000 km) thereafter, or as specified by the HOAT coolant manufacturer.
Transfer Case Fluid:
NV242: ATF+4 (MS-9602) recommended. NV247 (Quadra-Trac II/Quadra-Drive): Specific Mopar transfer case lubricant (e.g., MS-9224) or equivalent is critical.
Differential Fluid:
Front/Rear: SAE 75W-90 Synthetic Gear Lubricant (API GL-5). Limited slip differentials may require additive.
Power Steering Fluid:
ATF+3 (MS-7176E) or equivalent
Common Issues:
Cracked cylinder heads (4.7L V8), water pump leaks, radiator issues, death wobble (steering/suspension related), interior electronic failures, transfer case chain wear (NV247), transmission cooler line leaks.
Oil Filter Part Number Example:
Wix 51515, Mopar MO-090
Air Filter Part Number Example:
Wix 49039
Jeep Heritage:
Rooted in military vehicles since WWII, known for go-anywhere capability and robust construction.
Grand Cherokee Lineage:
First introduced in 1993 as a more luxurious and comfortable Jeep than the Cherokee (XJ). The WJ generation (1999-2004) was a significant redesign, moving to unibody construction, offering independent front suspension (IFS) for improved ride comfort, and introducing more premium features.
Production Plant:
Jefferson North Assembly Plant, Detroit, Michigan, USA
Wj Generation Years:
1999 - 2004
