Positioning:
Premium mid-size SUV, competing with models like Ford Explorer, Chevrolet Blazer, Toyota 4Runner.
Key Competitors:
Ford Explorer, Chevrolet Blazer, Toyota 4Runner, Nissan Pathfinder.
Distinguishing Features:
Robust four-wheel-drive systems (Selec-Trac, Quadra-Trac II, NV247), upscale interior for its class, strong towing capability.
Manual Value Proposition:
Essential resource for maintaining, troubleshooting, and repairing the Jeep Grand Cherokee WJ, enabling owners to save on dealership service costs and perform complex tasks.
Engine Mechanical:
Engine assembly, cylinder head, crankshaft, pistons, connecting rods, lubrication, cooling, fuel delivery, ignition, timing.
Engine Performance:
Engine tuning, diagnostic trouble codes (DTCs), emissions control systems.
Transmission Automatic:
42RE, 45RFE operation, overhaul, hydraulic controls, valve body, torque converter, electronic controls.
Drivetrain:
Transfer case (NV231, NV242, NV247), axles (Dana 30 front, Dana 35/44 rear), driveshafts, CV joints, propeller shafts, differential service.
Suspension:
Front and rear suspension components, control arms, ball joints, bushings, springs, shocks, steering linkage.
Steering:
Power steering system, steering gearbox, steering column, alignment specifications.
Brakes:
Brake system components (front and rear discs), ABS system, hydraulic lines, master cylinder, calipers, pads, rotors.
Electrical System:
Battery, charging system (alternator), starting system (starter), ignition system, lighting, horn, power windows, power locks, mirrors.
Body And Chassis:
Body panels, doors, hood, tailgate, interior trim, glass, structural components, underbody protection.
HVAC:
Heating, ventilation, and air conditioning (HVAC) system, refrigerant, compressor, evaporator, heater core.
Interior:
Seating systems, dashboard assembly, instrument panel, airbags, seat belts.
Diagnostics:
Diagnostic Trouble Codes (DTCs) for powertrain and body control modules, scan tool procedures, symptom charts.
Maintenance:
Oil changes, filter replacements, fluid level checks and changes, spark plug replacement, belt inspection and replacement.
Repair Engine:
Engine rebuilds, cylinder head removal/installation, piston and ring replacement, bearing replacement, oil pump service.
Repair Transmission:
Automatic transmission removal/installation, valve body repair, solenoid replacement, clutch pack service.
Repair Brakes:
Brake pad and rotor replacement, caliper overhaul, bleeding the brake system, ABS component diagnostics.
Repair Suspension Steering:
Component replacement (ball joints, tie rods, shocks), alignment procedures, steering gear service.
Electrical Troubleshooting:
Wiring diagrams, component testing, circuit diagnostics, fuse and relay identification.
Body Repair:
Panel alignment, door mechanism repair, glass replacement, trim installation.
HVAC Service:
Refrigerant recovery/recharge, component replacement (compressor, drier), leak detection.
Diagnostic Procedures:
Step-by-step diagnostic trees for common symptoms, testing specific sensors and actuators.
Depth:
Comprehensive factory-level detail suitable for professional technicians and advanced DIYers.
Diagnostic Detail:
Includes diagnostic trouble codes, symptom-based troubleshooting charts, and component testing procedures.
Rebuild Procedures:
Detailed instructions for engine and transmission overhauls, including specifications and torque values.
Base Engine:
4.0L (3956cc) Inline-6 OHV, 12-valve
Base Engine Power:
Approx. 190-205 hp @ 4600-5200 rpm (depending on year and tune)
Base Engine Torque:
Approx. 235-255 lb-ft @ 3000-3200 rpm (depending on year and tune)
Optional Engine:
4.7L (4701cc) V8 SOHC, 16-valve (PowerTech)
Optional Engine Power:
Approx. 220-235 hp @ 4700-4800 rpm (depending on year)
Optional Engine Torque:
Approx. 285-300 lb-ft @ 3200-3250 rpm (depending on year)
Fuel Delivery:
Sequential Multi-Port Fuel Injection (MPI)
Fuel Type:
Unleaded Regular (87 octane recommended for 4.0L, 89 octane recommended for 4.7L)
ECM Type:
Various Chrysler/Jeep ECM/PCM modules (e.g., NGC, PCI bus)
Oil Change Interval:
Every 3,000-7,500 miles (5,000-12,000 km) or 6-12 months, depending on driving conditions and oil type (refer to manual for specific recommendations).
Transmission Fluid Change Interval:
Every 30,000-60,000 miles (48,000-96,000 km) or 2-3 years, especially if towing.
Coolant Change Interval:
Every 30,000-60,000 miles (48,000-96,000 km) or 2-4 years.
Spark Plug Replacement:
4.0L: ~100,000 miles (160,000 km); 4.7L: ~75,000-100,000 miles (120,000-160,000 km) depending on plug type.
Engine Oil Type:
SAE 5W-30 (API Certified, meets Chrysler MS-6395)
Engine Oil Capacity 4.0L:
5.0 US quarts (4.7 liters) with filter
Engine Oil Capacity 4.7L:
6.0 US quarts (5.7 liters) with filter
Coolant Type:
Chrysler/Mopar HOAT (Hybrid Organic Acid Technology) Antifreeze/Coolant, 50/50 mix with distilled water.
Power Steering Fluid Type:
ATF+4 or specific Mopar Power Steering Fluid
Common Issues Engine:
Cracked cylinder heads (especially early 4.7L models), oil filter adapter seal leaks, valve cover gasket leaks, exhaust manifold cracks (4.0L).
Common Issues Transmission:
Slipping or harsh shifting (often due to worn solenoids or valve body issues), torque converter shudder.
Common Issues Suspension Steering:
Worn ball joints and tie rod ends, front sway bar links, rear track bar bushings, power steering pump whine.
Common Issues Electrical:
Instrument cluster failure (often the 'SBC' recall fix), heated seat element failure, window regulator issues, blower motor resistor failure.
Common Issues Cooling System:
Water pump leaks, radiator leaks, thermostat housing leaks, heater core leaks (difficult to access).
Common Issues Body:
Interior trim rattles, tailgate actuator failure, rust on wheel wells and rocker panels.
