Target Audience:
DIY enthusiasts, independent repair shops, and Jeep Grand Cherokee WJ owners seeking detailed technical information.
Manual Type Comparison:
This is a comprehensive factory-style workshop manual, providing a level of detail typically found in official dealership service manuals, superior to generic repair guides.
Unique Selling Points:
Step-by-step instructions, detailed diagrams, exploded views, torque specifications, fluid capacities, electrical schematics, and troubleshooting guides.
Powertrain:
Engine, Fuel System, Cooling System, Exhaust System, Transmission (Automatic and Manual), Transfer Case, Drive Axles
Chassis:
Suspension System (Front and Rear), Steering System, Braking System (ABS, Disc/Drum), Wheels and Tires
Electrical:
Complete Electrical System, Wiring Diagrams, Lighting, Instruments and Gauges, Power Accessories, Battery, Charging System, Starting System
Body And Interior:
Body Panels, Doors, Hood, Liftgate, Bumpers, Interior Trim, Seats, HVAC System (Air Temperature Control), Restraint Systems (Airbags)
Maintenance:
Scheduled Maintenance, Fluid Changes (Oil, Coolant, Transmission Fluid, Brake Fluid, Power Steering Fluid), Filter Replacements, Lubrication, Spark Plug Replacement
Repair:
Engine Rebuilding, Transmission Overhaul, Suspension Component Replacement, Brake Component Repair, Electrical Component Diagnosis and Repair, Body Panel Repair
Diagnostics:
Troubleshooting Guides, Diagnostic Trouble Codes (DTCs) and their meanings, Symptom-based diagnostics
Depth:
Comprehensive: From basic maintenance tasks to in-depth engine and transmission overhauls, including detailed diagnostic procedures and electrical schematics.
Engine Options:
4.0L (12-valve) Inline-6 'Power Tech' (Engine Code: ERH), 4.7L (16-valve) V8 'Power Tech' (Engine Code: A, B)
Horsepower 4.0L:
Approx. 190-195 hp @ 4600 rpm
Torque 4.0L:
Approx. 235-240 lb-ft @ 3200 rpm
Horsepower 4.7L:
Approx. 230-235 hp @ 4500 rpm
Torque 4.7L:
Approx. 295-300 lb-ft @ 3200 rpm
Injection Type:
Multi-port Fuel Injection (MPI)
Ignition Type:
Distributorless Ignition System (DIS) with individual coil-on-plug or coil pack ignition.
Transmission Options:
42RE 4-speed Automatic (for 4.0L), 45RFE/545RFE 4-speed/5-speed Automatic (for 4.7L)
Manual Transmission:
Not typically offered in the 2004 WJ Grand Cherokee in North America, primarily automatic.
Transfer Case:
Selec-Trac NV242 (full-time 2WD/4WD) or Quadra-Trac II NV247 (full-time 4WD with 2-speed transfer case and electronic limited-slip center differential).
Wheelbase:
Approx. 116.1 inches (2950 mm)
Length:
Approx. 189.5 inches (4813 mm)
Width:
Approx. 74.8 inches (1899 mm)
Height:
Approx. 67.9 inches (1725 mm)
Curb Weight Range:
Approx. 4,400 - 4,800 lbs (2000 - 2177 kg) depending on engine and equipment.
NHTSA Front Impact Driver:
5 Stars (for 2004 model year)
NHTSA Front Impact Passenger:
5 Stars (for 2004 model year)
Antilock Brakes:
Standard (ABS)
Traction Control:
Available (often part of the 4WD system or as an electronic traction control system).
Airbags:
Front airbags for driver and passenger; available side-impact airbags.
Oil Change Interval:
Typically every 3,000-5,000 miles (4,800-8,000 km) or 6 months, depending on driving conditions and oil type used. Refer to manual for exact schedule.
Transmission Fluid Change Interval:
Recommended every 30,000-60,000 miles (48,000-96,000 km) or as per severe service schedule. Refer to manual for specific fluid type and procedure.
Engine Oil Type 4.0L:
API Certified SAE 10W-30 (or 5W-30 for extreme cold). Consult manual for specific viscosity and API rating.
Engine Oil Type 4.7L:
API Certified SAE 5W-30. Consult manual for specific viscosity and API rating.
Transmission Fluid Type:
ATF+4 (Chrysler Material Number 05013457AA or equivalent) for 45RFE/545RFE. ATF+3 for 42RE. Consult manual for exact specification.
Coolant Type:
Mopar OAT (Organic Additive Technology) 5 Year/100,000 Mile Coolant or equivalent ethylene glycol-based coolant with appropriate additives for aluminum engines.
Brake Fluid Type:
DOT 3 (or DOT 4 for some braking systems). Consult manual.
Common Problems Wj:
Cracked cylinder heads (especially on early 4.7L engines), cooling system leaks (radiator, water pump, hoses), transmission solenoid issues (especially on 45RFE/545RFE), interior component wear, potential for death wobble on front suspension components if not properly maintained.
Jeep Legacy:
Jeep is an iconic American automotive brand with a history deeply rooted in off-road capability and ruggedness, dating back to WWII.
Wj Generation Development:
The WJ Grand Cherokee, produced from 1999 to 2004, represented a significant step up in refinement and luxury for the Grand Cherokee line, featuring unibody construction and more sophisticated powertrains compared to its predecessors.
Manufacturing Location:
Detroit, Michigan, USA (Jefferson North Assembly)
Model Years Covered:
1999-2004 (this manual specifically covers the 2004 model year within the WJ generation).
