Engine Mechanical:
Engine removal/installation, cylinder head, engine block, crankshaft, pistons, connecting rods, lubrication system, cooling system, fuel delivery, intake system, exhaust system
Engine Performance:
Engine diagnosis, performance tuning, emissions control systems
Transmission Automatic:
Transmission removal/installation, internal components, hydraulic controls, torque converter, diagnostic procedures
Transfer Case:
NV242 Selec-Trac, NV247 Quadra-Trac II operation and service, removal/installation, internal components
Driveline Axles:
Front axle, rear axle, differentials, driveshafts, universal joints, CV joints
Suspension:
Front suspension (short-long arm), rear suspension (multi-link solid axle), shock absorbers, springs, control arms, bushings
Steering:
Power steering system, steering gear, steering column, tie rods, power steering fluid
Brakes:
Front disc brakes, rear disc brakes, ABS system, hydraulic lines, brake fluid specifications, parking brake
Electrical System:
Battery, charging system, starting system, ignition system, lighting system, horn, wipers, power windows, power locks
Body Exterior:
Body panels, doors, hood, tailgate, bumpers, glass, mirrors, weatherstripping
Body Interior:
Seats, dashboard, trim panels, headliner, carpeting, climate control system (HVAC), audio system
Climate Control:
Air conditioning system, heater core, blower motor, refrigerant, diagnosis
Safety Restraints:
Airbag system, seat belts, SRS components
Diagnostic Troubleshooting:
Diagnostic Trouble Codes (DTCs), on-board diagnostics (OBD-II), symptom-based troubleshooting guides
Maintenance Procedures:
Oil changes, filter replacements, fluid checks and changes, spark plug replacement, belt inspection/replacement
Repair Procedures:
Step-by-step repair instructions for all major components and systems
Overhaul Procedures:
Detailed overhaul procedures for engines and transmissions
Troubleshooting Guides:
Systematic diagnostic and troubleshooting procedures for common and uncommon issues
Wiring Diagrams:
Comprehensive electrical wiring diagrams for all vehicle systems
Torque Specifications:
Precise torque specifications for all fasteners
Special Tools:
Identification and usage of specialized tools required for specific repairs
Depth Level:
Comprehensive (from basic maintenance to complete engine/transmission rebuilds)
Diagnostic Capability:
Advanced diagnostic procedures, including interpretation of diagnostic trouble codes and live data streams
Engine 1 Type:
4.0L Inline 6-Cylinder (MPI)
Engine 1 Displacement:
3952 cc (241 cu in)
Engine 1 Bore X Stroke:
98.5 mm x 86.6 mm (3.88 in x 3.41 in)
Engine 1 Compression Ratio:
8.8:1
Engine 1 Horsepower:
190 hp @ 4600 rpm
Engine 1 Torque:
235 lb-ft @ 3200 rpm
Engine 2 Type:
4.7L V8 (MPI) 'PowerTech'
Engine 2 Displacement:
4701 cc (287 cu in)
Engine 2 Bore X Stroke:
93.0 mm x 86.2 mm (3.66 in x 3.39 in)
Engine 2 Compression Ratio:
9.6:1
Engine 2 Horsepower:
235 hp @ 4500 rpm
Engine 2 Torque:
325 lb-ft @ 3200 rpm
Fuel Delivery:
Multi-Point Fuel Injection (MPI)
Fuel Type:
Unleaded gasoline (87 octane recommended, 91 octane for optimal V8 performance)
ECU Type:
Various Chrysler NGC (Next Generation Controller) models
Wheelbase:
116.0 inches (2946 mm)
Length:
186.5 inches (4737 mm)
Width:
74.7 inches (1897 mm)
Height:
71.0 inches (1803 mm)
Ground Clearance:
Approx. 8.7 inches (221 mm)
Curb Weight Min:
4,392 lbs (1992 kg) - 4.0L 2WD
Curb Weight Max:
4,801 lbs (2178 kg) - 4.7L V8 AWD
Gross Vehicle Weight Rating Gvwr:
Approx. 6,000 - 6,400 lbs (2722 - 2903 kg)
Cargo Volume Behind 2Nd Row:
37.5 cu ft (1062 L)
Cargo Volume Behind 1St Row:
74.5 cu ft (2110 L)
Oil Change Interval:
Every 5,000 miles (8,000 km) or 6 months (whichever comes first), or 3,000 miles (4,800 km) under severe driving conditions.
Transmission Fluid Service:
Inspect every 30,000 miles (48,000 km), replace fluid and filter every 60,000 - 100,000 miles (96,000 - 160,000 km) depending on usage.
Coolant Service:
Replace coolant every 100,000 miles (160,000 km) or 5 years with Mopar OAT (OAT) coolant.
Spark Plug Replacement:
4.0L I6: Every 100,000 miles (160,000 km) with platinum-tipped plugs. 4.7L V8: Every 100,000 miles (160,000 km) with iridium-tipped plugs.
Engine Oil Type 4.0L:
SAE 10W-30 (API certified)
Engine Oil Type 4.7L:
SAE 5W-30 (API certified)
Coolant Type:
Mopar OAT (5/150)
Power Steering Fluid Type:
ATF+4 (Mopar)
Common Problem 1:
Head Gasket Leaks (especially on early 4.7L V8 models)
Common Problem 2:
Cracked Cylinder Heads (4.7L V8)
Common Problem 3:
Transmission issues (e.g., solenoids, torque converter clutch failure)
Common Problem 4:
Worn front suspension components (ball joints, control arm bushings)
Common Problem 5:
Power steering pump leaks or noise
Common Problem 6:
Heater core leaks and AC evaporator issues
Common Problem 7:
Radiator leaks (plastic tanks)
Jeep Legacy:
Jeep's long history of producing rugged, capable off-road vehicles dating back to WWII
Wj Generation:
Second generation Grand Cherokee (WJ), introduced for the 1999 model year. Significant redesign over the ZJ generation, focusing on improved refinement, interior space, and on-road handling.
2001 Updates:
Minor updates for 2001, including potential feature packaging changes across trim levels (Laredo, Limited, Overland).
Production Location:
Jefferson North Assembly Plant, Detroit, Michigan, USA
Production Years Wj:
1999-2004