🏷️ Basic Information

Make:

Jeep

Model:

Grand Cherokee

Generation Code:

WJ

Year:

1999

Vehicle Platform:

WJ (1999-2004)

👋 Introduction

Target Audience:

Jeep Grand Cherokee WJ owners and independent repair shops looking for comprehensive DIY or professional repair information.

Value Proposition:

Provides professional-grade repair information, saving owners significant costs compared to dealership service. Empowers users with the same data their mechanic uses.

Diagnostic Focus:

Emphasis on troubleshooting, diagnostics, and computer diagnostic trees for effective problem-solving.

Technical Detail:

Rich in technical specifications, torque values, wiring diagrams, and vacuum schematics for precision work.

User Friendliness:

Designed to be understood with basic mechanical knowledge, making complex repairs accessible.

📋 Manual Details

Comprehensive Coverage:

Yes

Main Systems:

Engine, Transmission, Drivetrain, Suspension, Steering, Brakes, HVAC, Electrical, Body, Diagnostics

Estimated Page Count:

Extensive (Typical factory service manuals for this era are 1500-2500+ pages, depending on specific engine/transmission variants. This manual promises 'all the necessary needed instructions' and 'detailed illustrations, diagram’s technical specifications, depth illustrations and step by step explanations', indicating comprehensive coverage.)

Type:

Service and Repair Manual

Language:

English

Format:

Digital (Likely PDF, as implied by email delivery, though format isn't explicitly stated, the context suggests a downloadable file.)

📖 Manual Coverage

Engine Mechanical:

Overhaul, rebuilding, performance tuning, timing belt service, firing orders, detailed specifications.

Engine Management:

Troubleshooting and diagnostics, computer diagnostic trouble tree charts, engine performance analysis.

Transmission Drivetrain:

Removal and installation, in-car servicing, U-joint and CV-joint service procedures.

Suspension Steering:

Front end alignment procedures and specifications, suspension component service.

Brakes:

Brake servicing procedures, complete torque specifications for brake components.

HVAC:

Air conditioning service and capacities (refrigerant type, oil type, capacities).

Electrical Electronic:

Complete wiring diagrams, vacuum diagrams.

Maintenance:

Routine maintenance procedures, fluid changes, filter replacements.

Diagnostics:

Troubleshooting, fault code interpretation, diagnostic trouble tree charts.

Repair:

Step-by-step repair procedures for all major components, from front to back.

Rebuilding:

Engine overhaul and rebuilding procedures.

Installation:

Transmission removal and installation.

Depth:

Advanced Diagnostics and Comprehensive Rebuilds. The manual provides 'depth illustrations', 'technical specifications', and 'step by step explanations', indicating a high level of detail suitable for professional technicians as well as knowledgeable DIY enthusiasts.

Diagrams Illustrations:

Includes detailed illustrations, diagrams, and schematics.

Diagnostic Tools:

Coverage of computer diagnostics and associated charts.

📊 Manual Specifications

Digital Format:

Likely PDF (standard for downloadable repair manuals). Searchable text and printable pages are expected. Quality of scans/digitalization is crucial for usability.

Visual Aids:

High quality illustrations and diagrams as stated in description.

Binding:

N/A (Digital Format)

Paper Quality:

N/A (Digital Format)

Coverage Scope:

Full vehicle coverage, from front to back, for repairs and maintenance.

⚙️ Engine Specifications

Engine Options 1999 Wj:

4.0L Inline 6-Cylinder (PowerTech) and 4.7L V8 (PowerTech).

Engine Code 4.0L:

AMC 242 (common)

Engine Code 4.7L:

MPI (Multi-Point Fuel Injection), typically identified by '4.7L V8' designation. Specific internal codes may vary.

Horsepower:

Approx. 190 hp @ 4600 rpm (for 1999 model year)

Torque:

Approx. 235 lb-ft @ 3000 rpm (for 1999 model year)

Horsepower:

Approx. 220 hp @ 4700 rpm (for 1999 model year)

Torque:

Approx. 300 lb-ft @ 3200 rpm (for 1999 model year)

Fuel Injection Type:

Sequential Multi-Port Fuel Injection (MPI) for both engines.

Timing Drive 4.0L:

Timing Chain (robust, non-interference design).

Timing Drive 4.7L:

Timing Chain (dual overhead camshafts, likely also non-interference, but check specific manual details for confirmation).

Internal Components:

Manual covers piston installation, ring gapping, bearing clearances, cylinder head procedures, crankshaft and camshaft installation.

🔧 Transmission

Transmission Options:

42RE 4-Speed Automatic (for 4.0L engine), 45RFE 4-Speed Automatic (for 4.7L V8 engine).

Manual Transmission:

No manual transmission option available for the WJ generation.

42Re:

RWD bias, part-time 4WD system often paired with it. Electronic control for lock-up torque converter.

45Rfe:

More advanced electronically controlled transmission, with a wider gear ratio spread and often paired with full-time 4WD systems (e.g., Quadra-Trac II). Features three overdrive gears. Considered more robust for the V8.

Fluid Type 42Re:

ATF+3 or ATF+4 (check specific manual for exact 1999 recommendation).

Fluid Type 45Rfe:

ATF+4 (preferred and often required).

Procedures:

Includes procedures for valve body inspection, solenoid testing, filter and fluid changes without removal.

📐 Dimensions

Wheelbase:

116 inches

Length:

Approx. 184.5 inches

Width:

Approx. 73.5 inches

Height:

Approx. 65.4 inches

Curb Weight Range:

Approx. 4,300 - 4,700 lbs (depending on engine and drivetrain)

Towing Capacity:

Up to 5,000 lbs (with proper equipment and configuration)

Cargo Volume Behind Second Row:

Approx. 37.5 cubic feet

Cargo Volume With Second Row Folded:

Approx. 77.0 cubic feet

🛡️ Safety Features

NHTSA Front Impact:

Not rated for 1999 model year, but WJ generation generally performed well for its era. Subsequent models received better ratings.

Airbags:

Driver and passenger front airbags.

Seatbelts:

Front seat pretensioners, 3-point seatbelts for all occupants.

Rollover Protection:

Reinforced body structure, typical of SUVs. Later WJ models included enhanced side curtain airbags and rollover mitigation systems, but this is less common for 1999.

ABS:

Standard Anti-lock Braking System (ABS).

Traction Control:

Available on some models (e.g., with Quadra-Trac II), often denoted as 'Traction Control' or early forms of electronic stability control.

💡 Technology Features

Audio Systems:

Factory AM/FM stereo with CD player, cassette player, and optional premium Infinity Gold sound system.

Navigation:

Optional factory navigation system was available on higher trim levels towards the end of the WJ generation, but less common for 1999 models.

Cruise Control:

Standard cruise control.

Parking Sensors:

Not typically available for the 1999 model year.

Auxiliary Input:

No standard auxiliary or USB inputs. Aftermarket solutions may exist.

OBD Ii:

Equipped with OBD-II diagnostic port, allowing for scanning of trouble codes via an OBD-II scanner. The manual's diagnostic charts are crucial for interpreting these codes.

🔧 Maintenance

Oil Change:

Typically every 3,000-5,000 miles for conventional oil, or 5,000-7,500 miles for synthetic oil, depending on driving conditions. Check manual for specific recommendations.

Transmission Fluid Change:

Every 30,000-60,000 miles, or as per manual's severe duty recommendations.

Coolant Change:

Every 30,000-50,000 miles, or as per manual's specified interval for the coolant type.

Spark Plugs:

Approximately every 100,000 miles for iridium or platinum plugs (check if original plugs are specified).

Engine Oil Type 4.0L:

Typically 10W-30 or 5W-30 (check manual for exact viscosity based on temperature).

Engine Oil Type 4.7L:

Typically 5W-30 or 10W-30 (check manual for exact viscosity based on temperature).

Coolant:

Chrysler's HOAT (Hybrid Organic Acid Technology) coolant, typically Mopar HOAT or equivalent. Often a mix of 50/50 coolant and distilled water.

Brake Fluid:

DOT 3 or DOT 4 brake fluid (check manual).

Common Issues 4.0L:

Cracked cylinder heads (later models, but can affect earlier ones), oil filter housing leaks, intake manifold gasket leaks, TPS (Throttle Position Sensor) failure.

Common Issues 4.7L:

Cracked cylinder heads (major issue for this engine), camshaft synchronizer failure, plenum gasket leaks, oil sludge buildup if maintenance is neglected, valve seat recession.

Common Issues Drivetrain:

Transfer case chain stretch, propeller shaft universal joint (U-joint) wear, differential seal leaks.

Common Issues HVAC:

Blend door actuator failure, A/C evaporator leaks, blower motor resistor failure.

📚 Vehicle History

Jeep Legacy:

Jeep has a long history of off-road capability and rugged SUVs, dating back to its WWII origins. The Grand Cherokee line was introduced in 1993 as a more upscale, comfortable SUV compared to the Cherokee XJ.

Wj Generation:

The WJ generation (1999-2004) was a significant redesign from the ZJ (1993-1998). It featured a more modern interior, updated powertrains (especially the introduction of the 4.7L V8), and improved on-road manners while retaining off-road prowess.

Manufacturing Locations:

Primarily manufactured in Detroit, Michigan, USA, and Jefferson North Assembly Plant.

Production Period:

1999-2004

🏆 Awards & Recognition

Automotive Journal Ratings:

The WJ Grand Cherokee generally received positive reviews for its ride comfort, V8 power (for the 4.7L), and interior refinement compared to its predecessor. Off-road capability remained a strong suit.

Segment Positioning:

Competed in the mid-size luxury SUV segment against vehicles like the Ford Explorer, Toyota 4Runner, Chevrolet Blazer, and luxury offerings from Lexus and BMW.