Vehicle Segment:
Mid-size Luxury SUV
Key Competitors 1999:
Ford Explorer, Chevrolet Blazer, Toyota 4Runner, Land Rover Discovery
Jeep Strengths:
Renowned off-road capability, robust build, comfortable ride
Powertrain Options:
Choice of inline-6 and V8 engines, advanced 4WD systems
Interior Appointments:
Spacious cabin, premium materials, available luxury features
Engine:
All engine types and variants for 1999 Grand Cherokee WJ
Transmission:
Automatic and Manual Transmission systems
Drivetrain:
Four-wheel drive systems (Quadra-Trac II, Selec-Trac)
Suspension:
Front and rear suspension, steering components
Brakes:
Front and rear brake systems, ABS
Electrical:
Complete electrical system, wiring diagrams, ECU diagnostics
HVAC:
Heating, Ventilation, and Air Conditioning systems
Body:
Body panels, interior trim, glass replacement
Emissions:
Emissions control systems and diagnostics
Fuel System:
Fuel delivery, injection, and exhaust systems
Cooling System:
Radiator, water pump, cooling fan, thermostat
Exhaust System:
Catalytic converter, mufflers, pipes
Maintenance:
Scheduled maintenance, fluid changes, filter replacements
Diagnostics:
Troubleshooting guides, diagnostic trouble codes (DTCs), symptom analysis
Repair:
Step-by-step repair procedures for all major components
Rebuilds:
Engine and transmission rebuild procedures
Specifications:
Torque specifications, clearances, tolerances
Special Tools:
Identification of required special service tools
Depth Level:
Full dealership-level workshop procedures
Detail Level:
Detailed step-by-step instructions and exploded diagrams
Engine Code 1:
4.0L OHV Inline-6 (AMC 242)
Displacement 1:
3956 cc (242 cubic inches)
Horsepower 1:
185 hp @ 4500 rpm
Torque 1:
220 lb-ft @ 3000 rpm
Bore X Stroke 1:
98.5 mm x 86.7 mm
Compression Ratio 1:
8.75:1
Block Material 1:
Cast Iron
Head Material 1:
Aluminum
Engine Code 2:
4.7L OHV V8 (PowerTech)
Displacement 2:
4701 cc (287 cubic inches)
Horsepower 2:
220 hp @ 4800 rpm
Torque 2:
285 lb-ft @ 3200 rpm
Bore X Stroke 2:
93.0 mm x 86.0 mm
Compression Ratio 2:
9.0:1
Block Material 2:
Aluminum
Head Material 2:
Aluminum
Fuel Delivery:
Sequential Multi-Port Fuel Injection (MPI)
Fuel Type:
Unleaded Gasoline (87 octane recommended)
Transmission Type Std:
42RE 4-Speed Automatic (with 4.0L engine)
Transmission Type Opt:
45RFE 4-Speed Automatic (with 4.7L V8 engine)
Overdrive Gears:
4 forward gears, 1 reverse
Transmission Fluid Spec 42Re:
ATF+3 (Mopar)
Transmission Fluid Spec 45Rfe:
ATF+4 (Mopar)
NHTSA Rollover Rating:
Four stars (for 1999 model year)
ABS:
Standard Anti-lock Braking System (ABS)
Traction Control:
Optional Traction Control (TC) on some models
Airbags:
Driver and Passenger front airbags
Seatbelts:
Three-point seatbelts for all occupants
Oil Change Interval:
Every 3,000-7,500 miles (depending on oil type and driving conditions)
Engine Coolant Flush:
Every 30,000 miles or 2 years
Transmission Fluid Service:
Every 30,000-60,000 miles (ATF+3/ATF+4)
Engine Oil Spec 4.0L:
API SJ, SAE 10W-30 (preferred) or 10W-40
Engine Oil Spec 4.7L:
API SJ, SAE 10W-30 (preferred) or 10W-40
Coolant Type:
Ethylene Glycol (Mopar OAT or HOAT, typically Mopar Pentafrost G-05 or equivalent)
Power Steering Fluid:
ATF+3 or Mopar Power Steering Fluid
Common Issue 1:
Cracked cylinder heads (4.7L V8)
Common Issue 2:
Water pump leaks
Common Issue 3:
Front and rear differential leaks
Common Issue 4:
Transfer case chain stretch/wear
Common Issue 5:
Interior electrical gremlins (window motors, power locks)
Common Issue 6:
Heater core leaks
Jeep Legacy:
Long history of rugged, off-road capable vehicles dating back to WWII
Wj Introduction:
Introduced for the 1999 model year, replacing the ZJ generation.
Wj Design:
Featured a more aerodynamic and rounded design compared to the ZJ, improved interior comfort and refinement.
Manufacturing Location:
Jefferson North Assembly Plant, Detroit, Michigan, USA
