🏷️ Basic Information

Make:

Jeep

Model:

Grand Cherokee

Year:

1999

Internal Model Code:

WJ

👋 Introduction

Vehicle Segment:

Mid-size SUV

Key Competitors:

Ford Explorer, Toyota 4Runner, Chevrolet Blazer, Nissan Pathfinder

Distinguishing Factors:

Strong off-road capability, comfortable ride, spacious interior, availability of powerful V8 engines.

Platform:

WJ platform, shared with Mercedes-Benz ML.

Chassis:

Unibody construction with integrated body-frame (IBF) for improved rigidity and handling.

📋 Manual Details

Primary Focus:

Repair and Service

Estimated Pages:

1000+

Type:

Factory Service Manual

Language:

English

Format:

PDF Download

📖 Manual Coverage

Engine Mechanical:

Engine overhaul, assembly, disassembly, timing, lubrication, cooling, fuel, emission controls

Engine Performance:

Diagnosis and testing of engine performance issues

Transmission Automatic:

42RE, 44RE, 45RFE: overhaul, diagnosis, service, torque converter

Transmission Manual:

NV3500: overhaul, diagnosis, service

Drivetrain 4X4:

NV242, NV247 transfer cases, front/rear drive shafts, axles, differentials, CV joints

Brakes:

Front/rear brake systems, ABS, hydraulic components, parking brake

Suspension:

Front/rear suspension, control arms, springs, shock absorbers, steering linkage

Steering:

Power steering system, steering column, steering gear/rack

Electrical System:

Battery, charging system, starting system, ignition system, lighting

Body And Frame:

Body panel repair, structural components, doors, hood, tailgate, interior trim

HVAC:

Heating, ventilation, air conditioning system diagnosis and repair

Restraints:

Airbag system diagnosis and service

Diagnostics:

On-Board Diagnostics (OBD-II), DTCs, wiring diagrams, troubleshooting charts

Routine Maintenance:

Oil changes, filter replacements, fluid checks, tire rotations

Component Replacement:

Detailed instructions for replacing major and minor components

Engine Rebuild:

Complete engine overhaul procedures

Transmission Rebuild:

Detailed steps for automatic and manual transmission rebuilds

Troubleshooting:

Step-by-step diagnostic procedures for common and complex issues

Electrical Diagnosis:

Wiring diagrams, testing procedures for circuits and components

Body Repair:

Panel alignment, rust repair, trim removal/installation

Depth:

Comprehensive: Covers basic maintenance to full engine/transmission rebuilds and complex electrical diagnostics.

📊 Manual Specifications

File Type:

Searchable PDF

Quality:

High-resolution scans with clear diagrams and text

Binding:

N/A (Digital Download)

Paper:

N/A (Digital Download)

⚙️ Engine Specifications

Engine Option 1:

4.0L Inline-6 (242ci) 'Power Tech' I6

Engine Option 2:

4.7L V8 (285ci) 'PowerTech' V8

Horsepower 4.0L:

185 hp @ 4,600 rpm

Torque 4.0L:

235 lb-ft @ 3,200 rpm

Horsepower 4.7L:

220 hp @ 4,400 rpm

Torque 4.7L:

300 lb-ft @ 3,200 rpm

Fuel Delivery 4.0L:

Multi-point Fuel Injection (MPI)

Fuel Delivery 4.7L:

Multi-point Fuel Injection (MPI)

Emission System:

Catalytic converter, EGR system, O2 sensors

4.0L Engine Code:

ERH

4.7L Engine Code:

A8B (early), N/A (later)

🔧 Transmission

Transmission Type 4.0L:

42RE 4-speed Automatic

Transmission Type Manual 4.0L:

NV3500 5-speed Manual

Transmission Type 4.7L:

45RFE 4-speed Automatic (later revised to 5-speed)

Transfer Case Options:

Selec-Trac (NV242) - full-time 4WD; Quadra-Trac II (NV247) - full-time 4WD with electronic control.

42Re Fluid Type:

ATF+4 (MS-9602)

45Rfe Fluid Type:

ATF+4 (MS-9602)

📐 Dimensions

Length:

189.8 inches

Width:

73.3 inches

Height:

67.9 inches

Wheelbase:

116.0 inches

Curb Weight 4.0L:

4,453 lbs

Curb Weight 4.7L:

4,614 lbs

Cargo Volume Behind Second Row:

37.2 cubic feet

Cargo Volume Max:

77.0 cubic feet

🛡️ Safety Features

NHTSA Rollover Resistance:

4 out of 5 stars (likely for higher trims)

ABS:

Standard 4-wheel disc brakes with ABS

Traction Control:

Available

Airbags:

Driver and front passenger airbags

Seatbelts:

3-point seat belts with pretensioners

💡 Technology Features

Audio System:

Optional Infinity Gold premium sound system, CD player, cassette player

Cruise Control:

Standard

Auto Headlights:

Available

Connectivity Features:

Limited by era; basic power outlets.

🔧 Maintenance

Oil Change Interval:

Every 3,000 - 5,000 miles or 3-6 months, depending on driving conditions.

Transmission Service Interval:

Every 30,000 - 60,000 miles, depending on use.

Coolant Flush Interval:

Every 30,000 - 50,000 miles.

Engine Oil 4.0L:

10W-30 (API Service SG or higher)

Engine Oil 4.7L:

5W-30 (API Service SG or higher)

Coolant Type:

Chrysler HOAT (Hybrid Organic Additive Technology) coolant (typically pink or orange)

Engine Oil Capacity 4.0L:

6 quarts (with filter)

Engine Oil Capacity 4.7L:

7 quarts (with filter)

Common Issues List:

Head gasket leaks (especially 4.7L V8), cooling system failures (plastic components), death wobble (steering/suspension alignment issues), transfer case issues (NV247), interior electrical gremlins, starter motor issues.

Oil Filter 4.0L:

Mopar: MO-090, Wix: 51515

Oil Filter 4.7L:

Mopar: MO-090, Wix: 51515

📚 Vehicle History

Jeep Legacy:

Long history of robust, go-anywhere SUVs, starting with the original Willys Jeep.

Zj To Wj Transition:

Replaced the ZJ generation. The WJ introduced a significant redesign with improved aerodynamics, a more refined interior, and enhanced on-road manners, while retaining strong off-road capabilities.

Mercedes Benz Influence:

The WJ platform benefited from DaimlerChrysler's ownership, incorporating components and engineering from Mercedes-Benz (specifically the ML-Class).

Production Years Wj:

1999-2004

Manufacturing Plant:

Jefferson North Assembly, Detroit, Michigan

🏆 Awards & Recognition

Automotive Press Awards:

Often praised for its refinement and capability compared to competitors of its time.