🏷️ Basic Information

Make:

Jeep

Model:

Grand Cherokee

Year:

2001

Generation:

WJ

Chassis Code:

WJ

Engine Codes:

4.0L (ID: ERH), 4.7L (ID: AFA, AFK)

Transmission Codes:

42RE (4.0L), 45RFE/545RFE (4.7L)

👋 Introduction

Market Position:

The Jeep Grand Cherokee WJ (1999-2004) represented Jeep's move into the mid-size luxury SUV segment, competing with vehicles like the Ford Explorer, Chevrolet Blazer, and Toyota 4Runner, while also offering significant off-road capability.

Competitive Analysis:

The WJ Grand Cherokee distinguished itself with its unibody construction offering a more refined on-road ride compared to body-on-frame SUVs, while retaining Jeep's legendary off-road prowess through its advanced 4WD systems (Quadra-Trac II and Quadra-Drive).

Key Features:

Available with either the robust 4.0L inline-six or the more powerful 4.7L V8 engine, advanced four-wheel-drive systems, comfortable interior, and substantial towing capacity.

📋 Manual Details

Coverage Areas:

Engine, Transmission, Drivetrain, Brakes, Suspension, Steering, Electrical System, HVAC, Body, Chassis, Diagnostics, Troubleshooting, Maintenance

Page Count:

Approximately 2000+ pages (estimated for comprehensive workshop manuals of this era)

Manual Type:

Factory Service Manual / Workshop Manual

Language:

English

Format:

Digital (PDF)

📖 Manual Coverage

Engine:

Detailed diagnostics, repair procedures, specifications for 4.0L Power Tech I6 and 4.7L Power Tech V8 engines.

Transmission:

Service and repair for 42RE (4.0L) and 45RFE/545RFE (4.7L) automatic transmissions, including torque converter, valve body, and clutch packs.

Drivetrain:

Front and rear axle service, differentials (open, Trac-Lok, Quadra-Drive), NV242 and NV247 transfer cases, driveshafts, and U-joints.

Brakes:

Front and rear disc brake systems, ABS (Anti-lock Braking System), brake fluid specifications, rotor and pad replacement, caliper service.

Suspension:

Front and rear suspension component service (control arms, ball joints, bushings, springs, shocks), alignment specifications.

Steering:

Power steering system diagnosis and repair, steering gear and linkage service, steering column.

Electrical System:

Wiring diagrams, component locations, fuse box layouts, battery, charging system (alternator), starting system (starter motor).

Body:

Body panel removal and installation, door mechanisms, glass, interior trim, body hardware, paint and rust prevention.

HVAC:

Heating, ventilation, and air conditioning (HVAC) system service, refrigerant handling, component testing, and repair.

Fuel System:

Fuel tank, fuel pump, fuel injectors, fuel filter, fuel pressure regulator.

Cooling System:

Radiator, water pump, thermostat, coolant specifications, hoses, fan.

Exhaust System:

Exhaust manifolds, catalytic converter, mufflers, pipes, hangers.

Ignition System:

Spark plugs, ignition coils, ignition control module (ICM), timing.

Emission Control:

EGR system, PCV system, evaporative emission control (EVAP).

Maintenance:

Oil changes, filter replacements, fluid checks and changes, spark plug replacement, belt service.

Diagnostics:

System-specific diagnostic procedures, trouble code (DTC) interpretation, diagnostic flowcharts.

Repair:

Step-by-step repair instructions for all major vehicle components and systems.

Troubleshooting:

Guidance for identifying and resolving common and uncommon vehicle issues.

Installation:

Procedures for installing new or replacement parts.

Rebuilding:

Detailed instructions for engine and transmission rebuilds.

Torque Specifications:

Specific torque values for all critical fasteners.

Technical Depth:

Comprehensive: Covers basic maintenance to complete overhaul and advanced diagnostics, suitable for professional mechanics and advanced DIY enthusiasts.

📊 Manual Specifications

File Format:

PDF (Portable Document Format)

Print Quality:

High-resolution scans of original factory documentation, ensuring clarity of text and diagrams.

Binding Type:

N/A (Digital Format)

Paper Type:

N/A (Digital Format)

Searchability:

Searchable text within PDF for quick access to information.

Illustrations:

Includes detailed diagrams, exploded views, and schematics.

⚙️ Engine Specifications

4.0L Power Tech I6:

Displacement: 3952cc (242 cu. in.), Bore x Stroke: 3.88 x 3.41 in., Compression Ratio: 8.7:1, Horsepower: 190 hp @ 4600 rpm, Torque: 235 lb-ft @ 3200 rpm.

4.7L Power Tech V8:

Displacement: 4701cc (287 cu. in.), Bore x Stroke: 3.88 x 3.31 in., Compression Ratio: 9.0:1, Horsepower: 220 hp @ 4400 rpm (later models 235 hp @ 4800 rpm), Torque: 285 lb-ft @ 3200 rpm (later models 300 lb-ft @ 3200 rpm).

Engine Management:

Sequential multi-port fuel injection (MPI), OBD-II compliant.

Fuel Type:

Unleaded gasoline (87 octane recommended, higher octane for 4.7L recommended for optimal performance).

Fuel Capacity:

20.5 gallons (77.6 Liters)

Coolant Capacity:

Approx. 11.5 quarts (10.9 Liters)

4.0L Oil Capacity:

5.0 quarts (4.7 Liters) with filter

4.7L Oil Capacity:

5.5 quarts (5.2 Liters) with filter

Recommended Oil:

SAE 5W-30 (API Certified, meets Chrysler MS-6395 specification)

🔧 Transmission

Transmission 40L:

42RE 4-speed automatic

Transmission 47L:

45RFE / 545RFE 4-speed automatic (Note: 545RFE is an evolution of the 45RFE with 5 speeds electronically controlled).

Overdrive:

All automatic transmissions feature overdrive (4th gear).

Transmission Fluid:

ATF+4 (Chrysler specification)

42Re Capacity:

Approx. 9.0 quarts (8.5 Liters) dry fill

45Rfe 545Rfe Capacity:

Approx. 10.5 quarts (9.9 Liters) dry fill

📐 Dimensions

Wheelbase:

111.6 inches (2835 mm)

Length:

181.5 inches (4610 mm)

Width:

71.8 inches (1824 mm)

Height:

66.0 inches (1676 mm)

Curb Weight:

Approx. 4,200 - 4,500 lbs (1905 - 2041 kg), depending on configuration.

Towing Capacity:

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

Cargo Volume Behind Rear Seat:

Approx. 37.5 cu. ft. (1062 Liters)

Cargo Volume With Rear Seat Folded:

Approx. 70.5 cu. ft. (2000 Liters)

🛡️ Safety Features

NHTSA Frontal Crash Test:

Driver: 4 stars, Passenger: 4 stars (for 2001 model year, refer to NHTSA for specific test results).

IIHS Ratings:

Good in frontal offset (refer to IIHS for specific test results).

ABS:

Standard Anti-lock Braking System (ABS).

Traction Control:

Available Traction Control System (TCS).

Airbags:

Standard front driver and passenger airbags, optional side-impact airbags.

Seatbelts:

Three-point seatbelts with pretensioners.

💡 Technology Features

Infotainment Options:

Available premium audio systems, CD player, optional Infinity Gold audio system, available navigation system (later model years).

Cruise Control:

Standard cruise control.

Parking Assist:

Available rear park assist system (ParkSense).

Connectivity Features:

Standard power outlets, available steering wheel mounted audio controls.

🔧 Maintenance

Oil Change Interval:

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

Transmission Fluid Change Interval:

Every 30,000 to 60,000 miles (48,000 to 96,000 km) or 2-3 years, depending on driving conditions (severe use requires more frequent changes).

Coolant Change Interval:

Every 30,000 miles (48,000 km) or 2 years.

Spark Plug Replacement:

4.0L: 100,000 miles (160,000 km); 4.7L: 30,000-60,000 miles (48,000-96,000 km) depending on plug type.

Engine Coolant:

Chrysler OAT (Organic Acid Technology) Extended Life Antifreeze/Coolant, HOAT (Hybrid OAT) is also acceptable. Do NOT mix types. Typically a 50/50 mix with distilled water.

Brake Fluid:

DOT 3

Power Steering Fluid:

ATF+4 or Mopar Power Steering Fluid

Known Issues Common:

Cracked cylinder heads (4.7L V8), death wobble (front end shimmy, often related to steering/suspension components), water pump leaks, transfer case chain stretch, heated oxygen sensor (HO2S) failures, radiator leaks, rear main seal leaks.

Common Repairs Wjs:

Replacement of front upper and lower control arm bushings, steering stabilizer replacement, intake manifold gasket replacement (4.7L), radiator replacement, thermostat replacement.

📚 Vehicle History

Jeep Heritage:

Jeep has a storied history dating back to World War II with the Willys MB, known for its ruggedness, off-road capability, and durability.

Grand Cherokee Wj Evolution:

The WJ generation (1999-2004) was a significant redesign from the ZJ, featuring a completely new interior and exterior design, a more refined unibody chassis, and introduction of new powertrain options like the 4.7L V8 and advanced 4WD systems.

Production Years:

1999-2004

Manufacturing Location:

Jefferson North Assembly Plant, Detroit, Michigan, USA.

🏆 Awards & Recognition

Industry Recognition:

Jeep Grand Cherokee models have frequently been recognized by automotive publications for their off-road capabilities and overall value. The WJ generation was generally well-received for its improved refinement and capabilities.