🏷️ Basic Information

Make:

Jeep

Model:

Grand Cherokee

Generation:

WJ

Production Years:

1999-2004

Chassis Code:

WJ

👋 Introduction

Positioning:

The Jeep Grand Cherokee WJ (1999-2004) represented Jeep's evolution of its upscale SUV, bridging the gap between traditional Jeep ruggedness and a more refined, comfortable on-road experience. This era saw significant technological advancements and luxury features.

Competitors:

Competed directly with vehicles like the Ford Explorer, Chevrolet Blazer/TrailBlazer, Toyota 4Runner, Nissan Pathfinder, and Land Rover Discovery during its production run.

Features:

Available with powerful inline-6 and V8 engines, advanced 4WD systems (Quadra-Trac II, Quadra-Drive), comfortable and well-appointed interiors, and enhanced safety features for its time.

Value Proposition:

Essential for owners and independent repair shops to maintain, diagnose, and repair the Jeep Grand Cherokee WJ. Offers dealership-level technical information, saving significant costs compared to professional servicing.

📋 Manual Details

Years Covered:

1999, 2000, 2001, 2002, 2003, 2004

Engine Variants Covered:

All engine variants for the WJ generation

Trim Levels Covered:

All trim levels

Estimated Page Count:

Over 2500 (typical for comprehensive factory service manuals)

Type:

Comprehensive Service and Repair Manual

Language:

English

Format:

Downloadable Digital Format (likely PDF)

📖 Manual Coverage

Powertrain:

Engine mechanical, lubrication, cooling, fuel system, exhaust system, engine electrical, ignition system, starting and charging system, manual transmission, automatic transmission

Chassis:

Front suspension, rear suspension, steering system, brake system, driveline (4WD/AWD systems), wheels and tires

Body And Electrical:

Body and Frame, HVAC (Heating, Ventilation, and Air Conditioning), Exterior and Interior Trim, Lighting, Instrumentation, Wiper and Washer Systems, Power Accessories (windows, locks, mirrors), Audio System, Security System, Cruise Control, SRS (Supplemental Restraint System) / Airbags

Maintenance:

Scheduled maintenance, fluid changes, filter replacements, inspections

Diagnostics:

Troubleshooting flowcharts, symptom-based diagnostics, DTC (Diagnostic Trouble Code) interpretation, component testing

Repair:

Component removal and installation, internal component repairs, adjustments, specifications for torque, clearances, and alignment

Technical Data:

Wiring diagrams, vacuum diagrams, diagnostic procedures, specifications for all systems

Depth:

Comprehensive: Covers everything from basic maintenance and fluid checks to complete engine and transmission overhauls, electrical system diagnostics, and bodywork repairs. Suitable for professional technicians and advanced DIY enthusiasts.

📊 Manual Specifications

Format:

Digital Download (Likely PDF)

Searchability:

Text-searchable (typical for professionally created PDFs)

Quality:

High-resolution scans of original factory documentation

Binding:

Not Applicable (Digital Download)

Paper:

Not Applicable (Digital Download)

⚙️ Engine Specifications

Engine 1:

4.0L (3956cc) Inline-6 "Power Tech" (MPI)

Engine 1 Power:

Approx. 190 hp @ 4600 rpm

Engine 1 Torque:

Approx. 235 lb-ft @ 3000 rpm

Engine 2:

4.7L (4701cc) V8 "Magnum" (MPI)

Engine 2 Power:

Approx. 220-235 hp @ 4800-5000 rpm (depending on year/variant)

Engine 2 Torque:

Approx. 285-300 lb-ft @ 3200-3500 rpm (depending on year/variant)

Fuel System:

Sequential Multi-Port Fuel Injection (MPI)

Ignition System:

Distributorless Ignition System (DIS) with individual coil-on-plug (COP) on some V8 models or distributor ignition on early I6 models.

Type:

Pressurized liquid cooling system with electric cooling fan.

Oil Type:

Refer to manual; typically SAE 5W-30 or 10W-30 depending on climate for 4.0L, and SAE 5W-30 for 4.7L.

System:

California Emission Control System (CEC) and Federal Emission Control System (FEC) variations, depending on the state of sale.

🔧 Transmission

Transmission 1:

45RFE / 545RFE 4-speed Automatic Transmission (standard on most models, particularly with V8 engines)

Transmission 2:

NV3550 5-speed Manual Transmission (available on some 4.0L models, less common)

Automatic Fluid Spec:

ATF+4 (Mopar)

Manual Fluid Spec:

Refer to manual; likely synthetic gear oil (e.g., SAE 75W-90).

Overdrive:

All automatic transmissions feature overdrive (4th gear).

4Wd Systems:

Quadra-Trac II (NV247 transfer case with electronic control), Quadra-Drive (adds Vari-Lok front and rear differentials).

📐 Dimensions

Wheelbase:

116.0 inches (2946 mm)

Length:

184.6 inches (4690 mm)

Width:

73.3 inches (1862 mm)

Height:

66.7 inches (1694 mm)

Ground Clearance:

Approx. 8.0-8.3 inches (203-211 mm) depending on tires.

Passenger Volume:

Approx. 105 cubic feet (2973 L)

Cargo Volume Behind Rear Seat:

Approx. 37.5 cubic feet (1062 L)

Cargo Volume Max:

Approx. 79.1 cubic feet (2240 L)

Curb Weight Est:

4,400 - 4,800 lbs (2000 - 2180 kg) depending on configuration.

Towing Capacity:

Up to 5,000 lbs (2268 kg) with optional towing package.

🛡️ Safety Features

NHTSA Rollover Resistance:

4/5 Stars (for 2003 model, representative of generation)

IIHS Offset Frontal Impact:

Good (for 2003 model, representative of generation)

ABS:

Standard Anti-lock Braking System (ABS) on all wheels.

Traction Control:

Available traction control system (ASR) on 4.0L models, standard on V8 models or with Quadra-Drive.

Stability Control:

Electronic Stability Program (ESP) became available on later models (around 2002-2003 onwards).

Airbags:

Standard front airbags for driver and passenger. Available side-impact airbags (curtain or seat-mounted) on some later models.

Seatbelts:

3-point seat belts for all occupants, pre-tensioners for front seats.

💡 Technology Features

Audio System:

Factory installed AM/FM/CD players, optional premium Infinity or Boston Acoustic sound systems, and optional in-dash CD changer.

Navigation:

Optional factory navigation system was available on higher trims.

Cruise Control:

Standard cruise control system.

Telematics:

Optional Uconnect or similar early telematics systems may have been available depending on the year and trim.

Seating:

Available leather-appointed seating, heated front seats, 8-way power driver's seat, and driver's seat memory.

Climate Control:

Manual climate control or optional dual-zone automatic climate control.

🔧 Maintenance

Oil Change Interval:

Typically every 3,000-7,500 miles (5,000-12,000 km) or 6-12 months, depending on driving conditions and oil type (consult manual for exact intervals).

Tire Rotation Interval:

Every 5,000 - 7,500 miles (8,000 - 12,000 km).

Transmission Fluid Change:

Typically every 30,000 - 100,000 miles (50,000 - 160,000 km) for automatic transmissions, depending on usage and fluid condition (ATF+4 is often rated for longer life).

Engine Coolant:

Mopar OAT (Organic Additive Technology) Antifreeze/Coolant, HOAT (Hybrid Organic Additive Technology) might also be specified. Consult manual for exact type and mix ratio (typically 50/50).

Brake Fluid:

DOT 3 or DOT 4, consult manual for specific type.

Power Steering Fluid:

Mopar Power Steering Fluid or equivalent specified by manual.

Common Problems 1:

Radiator end tanks cracking (plastic tanks), water pump leaks, heater core issues, head gasket leaks (especially on early 4.7L V8), manifold crack (4.7L V8), rear main seal leaks, front differential housing leaks, transfer case chain stretch/wear.

Common Problems 2:

Actuator blend door failures in HVAC system, PCM (Powertrain Control Module) failures, ABS sensor failures, ignition coil failures, window regulator failures, rust issues on lower body panels and frame components.

Key Checks:

Regular inspection of cooling system hoses and radiators, monitoring of transmission fluid condition, checking for vacuum leaks, and inspecting suspension components for wear.

📚 Vehicle History

Jeep Legacy:

Jeep, originating from military vehicles, built a strong reputation for off-road capability and durability. The Grand Cherokee aimed to extend this into the burgeoning luxury SUV market.

Wj Generation:

The WJ generation (1999-2004) replaced the ZJ Grand Cherokee. It featured a unibody construction (inherited from the ZJ, but refined), independent front suspension for improved on-road manners, and updated powertrains and interior features.

Manufacturing Locations:

Primarily manufactured in Detroit, Michigan, USA.

Sales Trend:

The Grand Cherokee was a strong seller for Jeep during this period, contributing significantly to Chrysler's SUV dominance.

🏆 Awards & Recognition

Editors Choice:

Frequently recognized by automotive publications during its lifecycle for its blend of on-road comfort and Jeep's off-road heritage, often winning 'best in class' awards for SUVs.

Consumer Reports Rankings:

Consumer Reports ratings varied by year, often citing improved reliability over previous generations but still having some recurring issues, particularly with certain engine variants.

Safety Certifications:

Meets or exceeds all federal motor vehicle safety standards (FMVSS) for its production years.