🏷️ Basic Information

Make:

Jeep

Model:

Grand Cherokee

Generation:

WJ

Model Year:

1999

Chassis Code:

WJ

👋 Introduction

Positioning:

The Jeep Grand Cherokee WJ (1999-2004) occupied a significant segment of the mid-size luxury SUV market, competing with vehicles like the Ford Explorer, Chevrolet Blazer, Toyota 4Runner, and Land Rover Discovery.

Competitors 1999:

Ford Explorer, Chevrolet Blazer/TrailBlazer, Toyota 4Runner, Nissan Pathfinder, Mitsubishi Montero Sport, Land Rover Discovery.

Key Features Wj Generation:

Unibody construction for improved ride comfort and handling compared to body-on-frame predecessors, optional Quadra-Drive 4x4 system for superior off-road capability, refined interior appointments, available powerful V8 engines.

Purpose:

To provide comprehensive diagnostic, repair, and maintenance information to enable users to service and maintain their 1999 Jeep Grand Cherokee WJ effectively, thereby extending its lifespan and ensuring optimal performance.

📋 Manual Details

Systems Covered:

Introduction, Lubrication and Maintenance, Suspension, Differential and Driveline, Brakes, Clutch, Cooling System, Battery, Starting System, Charging System, Ignition System, Instrument Panel Systems, Audio Systems, Horn Systems, Vehicle Speed Control System, Turn Signal and Hazard Warning Systems, Wiper and Washer Systems, Lamps, Passive Restraint Systems, Electrically Heated Systems, Power Distribution Systems, Power Lock Systems, Vehicle Theft/Security Systems, Power Window Systems, Power Mirror Systems, Chime/Buzzer Warning Systems, Overhead Console Systems, Wiring Diagrams, Engine, Exhaust System and Intake Manifold, Frame and Bumpers, Fuel System (2.5L Diesel Engine), Steering, Transmission and Transfer Case, Tires and Wheels, Body, Heating and Air Conditioning, Emission Control Systems

Page Count:

Estimated based on typical comprehensive service manuals for this era and vehicle complexity. Exact count not provided in product info.

Manual Type:

Digital Service and Repair Manual

Language:

English

Format:

PDF

📖 Manual Coverage

Engine Systems:

Engine mechanical, lubrication, cooling, fuel, ignition, starting, charging, emission controls, intake and exhaust manifolds.

Drivetrain Systems:

Transmission (automatic and manual if applicable), transfer case, differentials (front, rear), driveshafts, CV joints, wheel bearings.

Chassis Systems:

Suspension (front and rear), steering system, brake system (hydraulic, parking), wheels, tires.

Electrical Systems:

Battery, starting, charging, ignition, lighting, instrument panel, power distribution, power locks, power windows, power mirrors, theft security, audio, horn, vehicle speed control, turn signals, hazard warnings, wipers/washers, heated systems, chimes/buzzers, overhead console.

Body And Comfort Systems:

Body construction, frame, bumpers, interior and exterior trim, heating, ventilation, and air conditioning (HVAC), passive restraints (airbags, seatbelts).

Maintenance Procedures:

Scheduled maintenance, fluid level checks and changes, filter replacements, lubrication, tire rotation, brake inspection, battery testing.

Diagnostic Procedures:

Troubleshooting guides, symptom-based diagnostics, diagnostic trouble codes (DTCs) interpretation (if applicable to the era/format), electrical system diagnostics.

Repair Procedures:

Step-by-step instructions for component removal, disassembly, inspection, repair, reassembly, and installation for all covered systems.

Technical Specifications:

Torque specifications, fluid capacities, fluid types, belt tensioning, alignment specifications, electrical component resistance and voltage values, engine timing settings, component clearances.

Wiring Diagrams:

Detailed electrical wiring schematics for all vehicle systems, including connector pinouts and component locations.

Depth:

Comprehensive. Covers everything from basic lubrication and maintenance to complex engine, transmission, and electrical system diagnostics and repairs. Designed for professional technicians and advanced DIY enthusiasts.

📊 Manual Specifications

File Format:

PDF

Readability:

Zoom in/out functionality for detailed viewing.

Compatibility:

Compatible with all versions of Windows and Mac. Usable on smartphones and tablets (may require an extractor app).

Distribution Format:

Compressed in ZIP (no extractor needed for the archive itself, but PDF reader is required for the manual).

Print Quality:

Digital format allows for high-resolution printing of specific pages or sections as needed.

Binding Type:

Digital (PDF), no physical binding.

Paper Type:

N/A (Digital format)

⚙️ Engine Specifications

Engine Options:

For the 1999 model year, the primary engine options were the 4.0L Inline 6-Cylinder (242 cu in) and the 4.7L V8 (287 cu in) 'PowerTech' engine. The manual also lists a 2.5L Diesel engine, which was less common in North America but available in other markets.

Horsepower 4.0L:

Approx. 185 hp @ 4600 rpm

Torque 4.0L:

Approx. 235 lb-ft @ 3200 rpm

Horsepower 4.7L:

Approx. 227 hp @ 4700 rpm

Torque 4.7L:

Approx. 300 lb-ft @ 3200 rpm

Fuel Delivery 4.0L:

Sequential Electronic Fuel Injection (SEFI)

Fuel Delivery 4.7L:

Sequential Electronic Fuel Injection (SEFI)

Engine Codes:

The manual would detail specific engine codes for different configurations (e.g., for emission standards or specific build types).

🔧 Transmission

Standard Transmission Type:

For 1999, the standard transmission was typically the 4-speed automatic 45RFE (later revised to 48RE for some applications).

Optional Transmission Type:

A 5-speed manual transmission (NV3500) was available on some lower trims and with the 4.0L engine, though less common than the automatic.

Transfer Case Options:

The manual covers various transfer case options, including the Selec-Trac (NV242) full-time 4WD and the optional Quadra-Drive (NV247) full-time 4WD system with front and rear electronic limited-slip differentials.

Automatic Transmission Fluid:

ATF+3 or ATF+4 (check manual for exact specification based on build date and transmission type).

📐 Dimensions

Wheelbase:

Approx. 111.2 inches (2824 mm)

Length:

Approx. 184.6 inches (4690 mm)

Width:

Approx. 71.3 inches (1811 mm)

Height:

Approx. 66.7 inches (1694 mm)

Curb Weight Approx:

4,400 - 4,800 lbs (1995 - 2177 kg), varies by engine and drivetrain

Towing Capacity Max:

Up to 6,500 lbs (2948 kg) when properly equipped with the 4.7L V8 and towing package.

🛡️ Safety Features

NHTSA Front Crash Test:

The NHTSA did not publish ratings for the 1999 model year in the same format as later years. However, the WJ Grand Cherokee was generally considered a safe SUV for its time.

Active Safety Features Typical:

Four-wheel Anti-lock Braking System (ABS), available Traction Control (on some models/drivetrains).

Passive Safety Features Typical:

Driver and front passenger airbags, front and rear seatbelt pretensioners, side-impact protection (structure).

Child Seat Anchors:

LATCH (Lower Anchors and Child Safety Seats) system was introduced in this era, though availability and specific implementation may vary. The manual would detail installation procedures.

💡 Technology Features

Audio System Features:

Standard AM/FM stereo with CD player (optional on some trims), available premium Infinity Gold sound system with amplifier and subwoofer. Cassette player was also common.

Driver Assistance Features:

While advanced driver-assistance systems (ADAS) were nascent in 1999, features like cruise control (vehicle speed control system) and ABS were standard or widely available. Parking sensors were not common.

Connectivity Features:

Limited by 1999 standards. Primarily focused on audio system connectivity. No Bluetooth or integrated smartphone connectivity. Some vehicles might have had optional satellite radio precursors.

Instrument Panel Systems:

Includes tachometer, speedometer, fuel gauge, coolant temperature gauge, oil pressure gauge, voltmeter, odometer, trip odometer, and various warning lights for systems like ABS, airbags, check engine, etc.

🔧 Maintenance

Oil Change Interval:

Typically every 3,000 to 7,500 miles, depending on driving conditions and oil type used. The manual will provide specific recommendations based on severe or normal service.

Tire Rotation Interval:

Approximately every 5,000 to 7,500 miles.

Transmission Fluid Change Interval:

Typically around 30,000 to 60,000 miles, depending on usage. Crucial for the longevity of the automatic transmission.

Engine Oil Spec 4.0L:

SAE 10W-30 is commonly recommended for the 4.0L, but consult the manual for the precise viscosity and API service classification. Some sources may list 5W-30 for colder climates.

Engine Oil Spec 4.7L:

SAE 5W-30 is typically recommended for the 4.7L V8. Always verify with the manual.

Coolant Type:

Chrysler/Mopar OAT (Organic Additive Technology) or HOAT (Hybrid Organic Additive Technology) coolant, typically a 50/50 mix with distilled water. The manual will specify the exact type and color.

Brake Fluid Type:

DOT 3 or DOT 4 brake fluid. Check the master cylinder reservoir cap and the manual for the precise specification.

Common Wj Issues 1999:

Valve body issues in the 45RFE transmission, front and rear differential leaks (especially with Quadra-Drive), heater core leaks, cracked exhaust manifolds (on 4.0L), power steering pump whine, O2 sensor failures, various electrical gremlins (common for the era).

Example Oil Filter 4.0L:

Mopar Part Number: MO-090 or equivalent Wix/Fram/K&N filter. Manual will list exact or equivalent P/Ns.

📚 Vehicle History

Jeep Heritage:

Jeep, a brand synonymous with off-road capability and ruggedness, has a long history dating back to World War II. The Grand Cherokee line was introduced in 1993 as a more luxurious and comfortable option within the Jeep lineup, bridging the gap between traditional Jeep utility and civilian comfort.

Wj Generation Introduction:

The WJ generation debuted for the 1999 model year, replacing the ZJ Grand Cherokee. It featured a significantly revised exterior and interior design, a unibody construction, and advanced drivetrain options.

Manufacturing Location:

The WJ Grand Cherokee was primarily manufactured in Detroit, Michigan, USA.

Wj Production Years:

1999-2004

🏆 Awards & Recognition

Industry Acknowledgements:

The Grand Cherokee WJ generally received positive reviews for its refined ride, capable four-wheel-drive systems, and upscale interior for its time, contributing to its strong market presence against competitors.

Consumer Satisfaction:

Consumer satisfaction varied. Early WJ models sometimes faced criticism for transmission reliability and electrical issues, which the manual would help owners address. Later models saw improvements.

Emissions Certification:

The manual details emission control systems and diagnostics relevant to meeting federal and state emissions standards for 1999 vehicles.