🏷️ Basic Information

Make:

Jeep

Model:

Grand Cherokee

Year:

2004

Chassis Code:

WG

👋 Introduction

Segment:

Mid-size Luxury SUV

Key Competitors 2004:

Ford Explorer, Toyota 4Runner, Chevrolet TrailBlazer, Nissan Pathfinder, Lexus RX 330

Platform:

WK platform (shared with Mercedes-Benz M-Class)

Design Era:

Second Generation Grand Cherokee

Powertrain Options:

Renowned for its V8 engine options and off-road capability

📋 Manual Details

Vehicle Models Covered:

Jeep Grand Cherokee WG (2004)

Estimated Page Count:

1500+

Type:

Full Service & Repair Manual

Language:

English

Format:

Digital (PDF)

📖 Manual Coverage

Engine:

Detailed diagnosis, repair, and overhaul of all gasoline engines (4.7L V8, 4.0L I6)

Transmission:

Repair and overhaul of automatic transmissions (e.g., 45RFE, 545RFE), including torque converter and external controls

Drivetrain:

Front and rear axle overhaul, differential service, driveshaft maintenance, transfer case (NV247/NV245) operation and repair

Suspension:

Front and rear suspension component diagnosis and replacement (control arms, ball joints, springs, shocks, bushings)

Steering:

Power steering system diagnosis, repair (pump, rack and pinion), and alignment procedures

Brakes:

Hydraulic system service, ABS diagnosis and repair, brake pad/rotor replacement, brake fluid flush

Electrical:

Comprehensive wiring diagrams, component testing, diagnosis of lighting, starting/charging system, power accessories, and body control modules

HVAC:

Air conditioning system service, diagnosis of climate control, blower motor, compressor, and refrigerant handling

Fuel System:

Fuel pump replacement, injector cleaning, fuel filter service, evaporative emission control (EVAP) system diagnosis

Exhaust System:

Catalytic converter replacement, muffler repair/replacement, exhaust manifold service

Cooling System:

Radiator service, water pump replacement, thermostat diagnosis, coolant flushing and filling

Body And Trim:

Interior and exterior trim removal/installation, body panel repair, door and window regulator service

Maintenance:

Routine maintenance tasks (oil changes, filter replacements, spark plug changes, tire rotations) with recommended intervals

Troubleshooting:

System-specific diagnostic charts and flowcharts for common and uncommon problems

Repair:

Step-by-step instructions for component removal, repair, and reinstallation

Rebuild:

Detailed procedures for engine and transmission rebuilds

Diagnostics:

OBD-II (On-Board Diagnostics II) code lookup and interpretation, sensor testing

Specifications:

Torque specifications for all fasteners, fluid capacities, engine timing settings

Level Of Detail:

Comprehensive, suitable for professional technicians and advanced DIY mechanics

📊 Manual Specifications

PDF Quality:

High-resolution, searchable text, printable pages

Digital Quality:

Clear, legible text and diagrams

Binding:

N/A (Digital Format)

Paper Quality:

N/A (Digital Format)

⚙️ Engine Specifications

Engine 1 Displacement:

4.0L (242 cu in) Inline-6

Engine 1 Horsepower:

195 hp @ 4600 rpm

Engine 1 Torque:

230 lb-ft @ 3200 rpm

Engine 2 Displacement:

4.7L (287 cu in) V8 (Magnum)

Engine 2 Horsepower:

235 hp @ 4700 rpm (later models 2004 may have 260 hp)

Engine 2 Torque:

285 lb-ft @ 3400 rpm (later models 2004 may have 315 lb-ft)

Valvetrain:

Overhead Valve (OHV), 2 valves per cylinder (4.0L I6), Single Overhead Cam (SOHC), 3 valves per cylinder (4.7L V8)

Fuel Delivery:

Multi-Point Fuel Injection (MPI)

Fuel Type:

Unleaded gasoline

ECU Type:

Chrysler PCI (Controller Area Network) bus

🔧 Transmission

Transmission Type Standard:

4-speed Automatic (45RFE/545RFE)

Transmission Type Optional:

5-speed Manual (rarely specified for 2004 WG, often on export models)

Transfer Case Options:

Selec-Trac (NV242) or Quadra-Drive II (NV245 with electronic traction control and differentials)

Automatic Transmission Fluid:

Chrysler ATF+4 (MS-9602)

📐 Dimensions

Wheelbase:

116.0 inches (2946 mm)

Length:

184.0 inches (4674 mm)

Width:

74.5 inches (1892 mm)

Height:

66.6 inches (1692 mm)

Cargo Volume Behind Rear Seat:

37.7 cubic feet (1068 L)

Cargo Volume With Rear Seat Folded:

71.0 cubic feet (2011 L)

Curb Weight Approx:

4,200 - 4,600 lbs (1905 - 2087 kg)

Towing Capacity Max:

5,000 - 6,500 lbs (2268 - 2948 kg), depending on configuration

🛡️ Safety Features

NHTSA Rollover Resistance Rating:

4 out of 5 stars (for 4x4 models)

IIHS Frontal Offset Crash Test:

Good (for 2002-2004 models)

ABS:

Standard 4-wheel Anti-lock Braking System (ABS)

Traction Control:

Available on 4x4 models (e.g., Quadra-Trac II with electronic traction control)

Airbags:

Standard front airbags, optional side curtain airbags for front and rear occupants

💡 Technology Features

Audio Options:

Factory AM/FM/CD player, optional Infinity premium sound system, Sirius Satellite Radio availability.

Navigation:

Optional factory navigation system available on higher trims.

Cruise Control:

Standard on all models.

Power Accessories:

Power windows, power door locks, remote keyless entry, available power liftgate.

🔧 Maintenance

Oil Change Interval:

Every 3,000-7,500 miles (5,000-12,000 km) or 6 months, depending on driving conditions and oil type (refer to manual for exact details).

Engine Air Filter Replacement:

Every 15,000-30,000 miles (24,000-48,000 km) or as needed based on inspection.

Spark Plug Replacement 4.0L:

Every 100,000 miles (160,000 km) with Champion copper plugs.

Spark Plug Replacement 4.7L:

Every 100,000 miles (160,000 km) with Champion platinum plugs.

Engine Oil Type 4.0L:

SAE 10W-30 (API Service SJ or higher) or SAE 5W-30 (for colder climates)

Engine Oil Type 4.7L:

SAE 5W-30 (API Service SL or higher)

Engine Coolant:

Chrysler OAT (Organic Additive Technology) Type II, Mopar OAT or equivalent HOAT (Hybrid Organic Additive Technology) coolant (e.g., Pentofrost A3)

Brake Fluid:

DOT 3

Power Steering Fluid:

Chrysler ATF+4 or Mopar Power Steering Fluid

Common Wear Items:

Front suspension components (ball joints, tie rod ends, control arm bushings), fuel pump failures, radiator leaks, PCM failures (older models), heated oxygen sensor failures.

4.7L V8 Issues:

Cylinder head cracking in earlier versions, though 2004 models generally had improved reliability. Valve seal leaks can cause oil consumption.

4.0L I6 Issues:

Known for durability, common issues include oil leaks from valve cover and oil pan gaskets, and potential exhaust manifold cracks.

📚 Vehicle History

Jeep Legacy:

Jeep's reputation for robust off-road capability and durable SUVs

Grand Cherokee Generations:

The WK is the second generation, representing a significant redesign from the previous ZJ platform, incorporating European engineering influence from DaimlerChrysler's ownership.

Wg Code Significance:

WG chassis code denotes the 2004 model year in this generation.

Assembly Location:

Jefferson North Assembly Plant, Detroit, Michigan, USA

Wk Generation Years:

2005-2010 (Note: 2004 WG is the end of the previous generation, this manual covers a specific year within the broader WK context if referencing the 'WG' code correctly)

Predecessor Code:

ZJ (1993-1998)

🏆 Awards & Recognition

Motor Trend SUV Of The Year:

The Grand Cherokee line (though not specifically the 2004 WG) has historically received positive reviews for its blend of on-road comfort and off-road prowess. The WK generation was a recipient of various awards in its tenure.