Positioning:
The Jeep Grand Cherokee WJ (1999-2004) occupied a significant segment of the mid-size luxury SUV market, known for its off-road capability and comfortable on-road manners.
Competitors:
Competed with vehicles like the Ford Explorer, Chevrolet Blazer/TrailBlazer, Toyota 4Runner, Nissan Pathfinder, and Land Rover Discovery.
Features:
Offered powerful V8 engine options, sophisticated four-wheel-drive systems (Quadra-Trac II, Quadra-Drive II), luxurious interiors for its time, and strong towing capabilities.
Purpose:
This manual is an indispensable resource for professional technicians and knowledgeable DIY enthusiasts, providing detailed procedures for diagnosis, repair, and maintenance.
Engine:
All engine diagnostics, repair, overhaul, specifications for 4.0L I6 and 4.7L V8 engines
Transmission:
Service and repair of NV247 Quadra-Trac II, NV245 Quadra-Drive II, and Mercedes-Benz sourced 545RFE/NAG1 automatic transmissions
Drivetrain:
Front and rear axle service, differential repair, NV247/NV245 transfer case servicing
Suspension:
Front solid axle (Dana 30), rear axle (Dana 44A), steering system, shocks, springs, bushings, linkages
Brakes:
Front and rear brake systems (vented discs), ABS, traction control, parking brake
Electrical:
Complete wiring diagrams, power distribution, lighting, starting and charging systems, ignition system, sensors
HVAC:
Heating, ventilation, and air conditioning system diagnosis and repair
Body And Trim:
Interior and exterior body panels, doors, windows, seats, and trim component removal/installation
Comfort And Convenience:
Power windows, locks, mirrors, seats, sunroof, remote keyless entry
Maintenance:
Scheduled maintenance, oil changes, filter replacements, fluid checks and changes
Troubleshooting:
Diagnostic flowcharts, symptom-based troubleshooting guides, error code interpretation
Repair:
Step-by-step repair procedures for all major components and systems
Overhaul:
Detailed instructions for engine and transmission rebuilds
Diagnosis:
Advanced diagnostic procedures using specific tools and techniques
Specifications:
Torque specifications, clearances, alignment data, component measurements
Assembly Disassembly:
Detailed instructions for the removal and installation of all major components and sub-assemblies.
Special Tools:
Identifies and describes the use of any special tools required for specific repair procedures.
Depth:
Comprehensive, from basic fluid checks to complete engine and transmission overhauls, including electrical system diagnostics and troubleshooting
Diagnostics Tools:
Coverage of diagnostic trouble codes (DTCs) and their interpretation, often referencing OBD-II scanners.
Body Repair:
Includes basic body repair information, panel alignment, and trim removal/installation.
Engine 1:
4.0L (242 cu in) I6 Power-Tech
Engine 1 Hp:
190 hp @ 4600 rpm (approx.)
Engine 1 Torque:
235 lb-ft @ 3200 rpm (approx.)
Engine 2:
4.7L (287 cu in) V8 Magnum/High Output
Engine 2 Hp:
235 hp @ 4750 rpm (approx.) / 260 hp (HO) @ 5200 rpm (approx.)
Engine 2 Torque:
295 lb-ft @ 3250 rpm (approx.) / 325 lb-ft (HO) @ 3500 rpm (approx.)
Fuel Injection:
Sequential Multi-Port Fuel Injection (MPI)
ECU:
NGC (Next Generation Controller) for 4.7L, similar for 4.0L
Transmission Type:
4-speed Automatic (42RE for 4.0L, 45RFE/545RFE for 4.7L)
Manual Transmission:
Not available for the 2004 model year.
Transfer Case 1:
NV247 Quadra-Trac II (full-time, on-demand 4WD)
Transfer Case 2:
NV245 Quadra-Drive II (full-time, electronic shifting with front/rear electronic LSDs)
Automatic Transmission Fluid:
ATF+4 (Mopar)
NHTSA Front Driver:
5-star (1999-2004)
NHTSA Front Passenger:
5-star (1999-2004)
IIHS Moderate Overlap Front:
Good (2002-2003 model years tested)
ABS:
Standard Anti-lock Braking System (ABS)
Traction Control:
Available Traction Control (TCS)
Airbags:
Front dual-stage airbags, optional front side-impact airbags
Audio System:
Available premium audio systems (e.g., Infinity Gold) with CD player, cassette, and AM/FM radio.
Navigation:
Optional factory navigation system available on higher trims.
Cruise Control:
Standard cruise control
Remote Keyless Entry:
Available remote keyless entry system
Climate Control:
Available dual-zone automatic climate control
Oil Change:
Every 3,000 - 7,500 miles (5,000 - 12,000 km) or 6 months, depending on oil type and driving conditions (refer to manual for specifics).
Transmission Fluid Change:
Every 30,000 - 60,000 miles (48,000 - 96,000 km) or 2-4 years, under severe use or towing, check manual.
Coolant Change:
Every 30,000 - 100,000 miles (48,000 - 160,000 km) or 2-5 years, depending on coolant type (HOAT recommended).
Engine Oil:
5W-30 or 10W-30 (depending on climate and engine), API certified.
Coolant:
Chrysler HOAT (Hybrid Organic Acid Technology) Antifreeze/Coolant
Power Steering Fluid:
ATF+4 or Mopar Power Steering Fluid
Cracked Cylinder Heads:
Common on early 4.7L V8 engines due to material composition and thermal stress.
Transfer Case Pump Failure:
NV247 transfer case can experience pump failures leading to 2WD operation or binding.
Window Regulator Failure:
Plastic components in window regulators can degrade and fail.
Radiator Leaks:
Plastic end tanks on radiators can crack over time.
Oil Filter Adapter Housing:
Leaking from the oil filter adapter housing on 4.7L engines.
Ignition Coil Failure:
Individual coil-on-plug failures can cause misfires.
Jeep Legacy:
Jeep, a brand with a long history of rugged, go-anywhere vehicles, known for its off-road prowess dating back to WWII.
Wj Generation:
The WJ generation (1999-2004) marked a significant refinement over the previous ZJ, introducing unibody construction, independent front suspension (IFS) for improved on-road ride, and more advanced powertrain options.
Production Years:
1999-2004
Manufacturing Location:
Jefferson North Assembly Plant, Detroit, Michigan, USA
Initial Release Accolades:
WJ Grand Cherokee was generally well-received for its refined interior, improved ride quality, and upscale features upon its introduction, often praised for its blend of luxury and off-road capability.
Consumer Satisfaction:
Mixed to positive consumer reviews throughout its lifecycle, with common points of praise being comfort and capability, and common critiques relating to reliability of certain electronic components and the 4.7L engine's cylinder head issues.
