Segment:
Mid-size Luxury SUV
Key Selling Points:
Off-road capability, comfortable ride, spacious interior, premium features for its era.
Competitors:
• Ford Explorer
• Toyota 4Runner
• Chevrolet Blazer
• Nissan Pathfinder
• Land Rover Discovery
Features 1999:
Introduction of the WJ platform, significantly updated interior and exterior styling, improved ride quality, available premium audio systems, dual-zone climate control (optional).
Engine:
4.0L 'Power Tech' Inline-6 (MPI), 4.7L 'PowerTech' V8 (MPI)
Transmission:
42RE 4-Speed Automatic (for 4.0L), 45RFE 4-Speed Automatic (for 4.7L)
Drivetrain:
Quadra-Trac II (NV247) Full-Time 4WD, Selec-Trac (NV242) Part-Time 4WD
Suspension:
Front: Solid Axle (Dana 30), Rear: Solid Axle (Dana 35)
Brakes:
Front: Ventilated Disc, Rear: Disc; ABS System
Electrical:
Chassis Electrical, Engine Control Module (ECM), Body Control Module (BCM), Lighting, Instruments, HVAC Controls, Audio System, Security System
Steering:
Power Steering System
Body:
Body Exterior, Interior Trim, Doors, Windows, Seats, Glass
Maintenance:
Scheduled Maintenance, Oil Changes, Filter Replacements, Fluid Checks and Replacements, Tire Rotation
Diagnostics:
Troubleshooting charts, DTC (Diagnostic Trouble Code) lookup, symptom-based diagnostics
Repair:
Engine overhaul, transmission service, brake system repair, suspension component replacement, electrical system repair, body panel repair
Installation:
Component replacement procedures, timing belt/chain replacement, accessory installation guidance
Specifications:
Torque specifications, fluid capacities, electrical schematics, measurement specifications
Depth:
Comprehensive: Covers basic maintenance to advanced diagnostics and complete overhauls, including detailed wiring diagrams and schematics.
Engine 1 Type:
4.0L Inline-6 'Power Tech'
Engine 1 Displacement:
3952 cc (241 cu in)
Engine 1 Bore X Stroke:
3.88 x 3.41 in (98.5 x 86.5 mm)
Engine 1 Compression Ratio:
8.8:1
Engine 1 Horsepower:
185 hp @ 4700 rpm
Engine 1 Torque:
220 lb-ft @ 3000 rpm
Engine 2 Type:
4.7L V8 'Power Tech'
Engine 2 Displacement:
4701 cc (287 cu in)
Engine 2 Bore X Stroke:
3.89 x 3.14 in (98.9 x 79.8 mm)
Engine 2 Compression Ratio:
9.0:1
Engine 2 Horsepower:
227 hp @ 4700 rpm
Engine 2 Torque:
325 lb-ft @ 3200 rpm
Fuel Delivery:
Sequential Multi-Port Fuel Injection (MPI)
Recommended Fuel:
Unleaded Regular 87 Octane (4.0L), Premium Unleaded 91 Octane Recommended (4.7L)
Transmission Type Standard:
4-speed Automatic (42RE for 4.0L, 45RFE for 4.7L)
Transmission Type Optional:
N/A (Automatic was standard)
Transmission Fluid Spec 42Re:
ATF+3 or ATF+4
Transmission Fluid Spec 45Rfe:
ATF+3 or ATF+4
Transfer Case Std:
Selec-Trac NV242 (Part-Time 4WD)
Transfer Case Opt:
Quadra-Trac II NV247 (Full-Time 4WD)
Wheelbase:
116.1 inches (2949 mm)
Length:
181.5 inches (4610 mm)
Width:
74.5 inches (1892 mm)
Height:
67.4 inches (1712 mm)
Ground Clearance:
8.3 inches (211 mm)
Cargo Volume Behind 2Nd Row:
37.5 cu ft
Cargo Volume Max:
74.5 cu ft
Curb Weight Est 4.0L:
4344 lbs (1970 kg)
Curb Weight Est 4.7L:
4420 lbs (2005 kg)
Towing Capacity:
Up to 6500 lbs (with optional towing package)
Wheel Bolt Pattern:
5x114.3 mm (5x4.5 inches)
Recommended Tire Size:
P235/65R17, P225/75R16 (depending on trim/options)
NHTSA Driver Frontal Crash:
4 Stars
NHTSA Passenger Frontal Crash:
4 Stars
ABS:
Standard (4-wheel disc brakes with ABS)
Traction Control:
Optional (often bundled with premium 4WD systems or options)
Airbags Front:
Driver and Passenger Airbags
Seatbelts:
3-point seatbelts for all occupants, front seatbelt pretensioners
Oil Change Interval:
Every 7,500 miles or 6 months (whichever comes first) for synthetic blend oil.
Transmission Fluid Change Interval:
Every 30,000 - 60,000 miles (depending on driving conditions and fluid type used).
Coolant Change Interval:
Every 30,000 miles or 2 years (initially), then potentially longer intervals with modern coolants.
Engine Oil Spec:
SAE 5W-30 (API Service SG or higher) for 4.0L, SAE 10W-30 (API Service SJ or higher) for 4.7L. Check owner's manual for specific year/temperature requirements.
Coolant Spec:
Mopar OAT (Organic Additive Technology) Antifreeze/Coolant, or equivalent.
Power Steering Fluid Spec:
Mopar Power Steering Fluid or equivalent Dexron III ATF.
Common Problem 1:
Cracked cylinder heads on the 4.7L V8 engine (prior to specific revisions).
Common Problem 2:
Water pump failure (especially on the 4.7L).
Common Problem 3:
Front suspension wear (ball joints, tie rod ends, control arm bushings) due to vehicle weight and off-road use.
Common Problem 4:
Electronic control module (ECM) failures or intermittent issues.
Common Problem 5:
HVAC blower motor resistor failure.
Jeep Legacy:
Jeep's long history of robust 4x4 vehicles and off-road capability, dating back to WWII.
Grand Cherokee Introduction:
First generation (ZJ) introduced in 1993 as a more luxurious and comfortable alternative to the Cherokee XJ.
Wj Generation Start:
1999 marked the debut of the second generation (WJ), a complete redesign featuring a more refined interior, improved aerodynamics, and new powertrain options.
Manufacturing Location:
Jefferson North Assembly Plant, Detroit, Michigan, USA
Model Years Wj:
1999-2004
Motor Trend SUV Of The Year 1999:
N/A (The WJ Grand Cherokee was not the recipient of MotorTrend's SUV of the Year in 1999, which was awarded to the Ford Explorer.)
Popular Mechanics Editor Choice:
The WJ platform generally received positive reviews for its refined ride and improved interior compared to its predecessor.