Target Audience:
Families, off-road enthusiasts, towing applications, general utility.
Competitors:
Ford Explorer, Chevrolet Blazer, Toyota 4Runner, Nissan Pathfinder, Dodge Durango.
Off Road Capability:
Renowned Jeep off-road prowess, available Quadra-Drive 4WD system, robust construction.
Powertrain Options:
Powerful inline-6 and V8 engine options, suitable for towing and performance.
Interior Space:
Spacious interior for passengers and cargo, comfortable for long journeys.
Powertrain:
Engine mechanical, fuel system, ignition system, exhaust system, cooling system, lubrication system, powertrain control module (PCM) diagnostics.
Transmission Drivetrain:
Automatic transmission (e.g., 42RE, 45RFE, 545RFE), transfer case (e.g., NV242, NV247), driveline components, axles, differentials, driveshafts, CV joints.
Chassis Suspension Steering:
Front and rear suspension (Solid axle, Independent Front Suspension on later WJ models), steering system, power steering, wheel alignment specifications.
Brakes:
Front and rear brake systems (disc brakes, ABS), brake hydraulics, parking brake.
Electrical:
Battery, charging system, starting system, lighting, instrumentation, power windows, locks, mirrors, HVAC controls, body control module (BCM), wiring diagrams, diagnostic connectors (OBD-II).
Body Exterior:
Body panels, doors, hood, tailgate, bumpers, glass, seals, exterior trim, paint codes.
Body Interior:
Seating systems, interior trim, dashboard, center console, HVAC ducting, airbags, seat belts, sound insulation.
Maintenance:
Scheduled maintenance intervals, fluid changes (engine oil, transmission fluid, coolant, brake fluid, power steering fluid, differential fluid), filter replacements, lubrication points.
Troubleshooting:
Diagnostic charts, symptom-based troubleshooting, fault code diagnosis, electrical system diagnostics.
Repair:
Step-by-step repair procedures for all major components, engine overhaul, transmission overhaul, suspension component replacement, brake system repair, electrical component replacement.
Diagnostics:
Diagnostic trouble code (DTC) interpretation, scan tool usage, component testing procedures (e.g., fuel pressure, spark testing, sensor readings).
Specifications:
Torque specifications for fasteners, component clearances, alignment data, fluid capacities, electrical resistance values.
Depth:
Comprehensive: Covers basic maintenance, routine servicing, in-depth diagnostics, component-level repair, and complete system overhauls. Suitable for professional technicians and advanced DIY enthusiasts.
Engine Type 1:
4.0L Inline 6-Cylinder (High Output)
Displacement 1:
3957 cc (242 cubic inches)
Horsepower 1:
185-195 hp @ 4600 rpm (depending on year)
Torque 1:
230-245 lb-ft @ 3200 rpm (depending on year)
Engine Type 2:
4.7L V8 (Magnum)
Displacement 2:
4701 cc (287 cubic inches)
Horsepower 2:
220-235 hp @ 4700 rpm (depending on year)
Torque 2:
295-325 lb-ft @ 3200 rpm (depending on year)
Fuel Delivery:
Multi-point Fuel Injection (MPI)
Recommended Fuel:
87 Octane Unleaded gasoline (premium may be recommended for V8)
Transmission Type Standard:
4-speed Automatic Transmission
Transmission Type Optional:
5-speed Automatic Transmission (later models with V8)
42Re:
Commonly paired with the 4.0L I6. Known for durability.
45Rfe/545Rfe:
Introduced later, often with the 4.7L V8. Features electronically controlled overdrive.
Transfer Case Options:
New Process NV242 (full-time 4WD with 2WD option), New Process NV247 (full-time 4WD with electronic control and limited slip center differential on Grand Cherokee Limited).
NHTSA Frontal Impact Driver:
Acceptable (for early models, ratings may vary and be less stringent than modern standards)
NHTSA Frontal Impact Passenger:
Acceptable (for early models)
ABS:
Standard on most models, optional on some earlier configurations.
Traction Control:
Available on some models, particularly those with Quadra-Trac II or Quadra-Drive.
Airbags:
Driver and passenger front airbags standard. Side airbags optional on later models.
Seat Belts:
3-point seat belts for all occupants. Pretensioners for front seats.
Engine Oil Change:
Every 3,000 - 5,000 miles or 3-6 months (depending on oil type and driving conditions).
Transmission Fluid Change:
Every 30,000 - 60,000 miles (heavy use may require more frequent changes).
Coolant Flush:
Every 30,000 - 60,000 miles or 2-4 years.
Spark Plugs:
Every 60,000 - 100,000 miles (depending on plug type, e.g., copper vs. platinum/iridium).
Engine Oil:
SAE 10W-30 or 10W-40 (check owner's manual for specific viscosity recommendations based on climate).
Transmission Fluid:
ATF+4 (for 45RFE/545RFE), ATF+3 or equivalent (for 42RE, consult manual for exact specs).
Coolant:
Mopar Antifreeze/Coolant (HOAT formula, typically green or orange) or equivalent. 50/50 mix with distilled water.
Power Steering Fluid:
Mopar Power Steering Fluid or Dexron III/Mercon compatible fluid.
Differential Fluid:
Gear oil, typically SAE 75W-90 (GL-5 rated). Limited-slip differentials may require friction modifier.
Cooling System:
Leaking heater control valve, cracked radiator end tanks, water pump seal leaks, frequent thermostat failures. Coolant leaks are a common concern.
Transmission:
Overheating, solenoid issues, potential '3-4 clutch' failure on 42RE. 45RFE/545RFE generally more robust.
Suspension:
Worn ball joints, tie rod ends, track bar bushings, and control arm bushings. Death wobble on solid axle models (pre-WJ, but relevant for context if manual covers ZJ era components).
Electrical:
Headlight switch failures, window regulator failures, intermittent sensor failures (e.g., Crankshaft Position Sensor), BCM issues.
Engine 4.0L:
Cracked cylinder heads (older 4.0L variants, less common on WJ), intake manifold gasket leaks, oil filter adapter leaks.
Engine 4.7L:
Valve stem seal issues, potential for sludge if oil changes are neglected, cracked exhaust manifolds.
Jeep Legacy:
Jeep has a long history of producing rugged, capable SUVs known for off-road prowess and utility, dating back to WWII.
Zg Jeep:
The WJ generation (1999-2004) represented a significant evolution from the ZJ Grand Cherokee, featuring a more refined and aerodynamic design, improved interior, and updated powertrains.
Wj Introduction:
The WJ generation debuted in late 1998 for the 1999 model year, succeeding the popular ZJ.
Manufacturing Plant:
Jefferson North Assembly, Detroit, Michigan, USA.
Production Years Wj:
1999-2004 (This manual covers a specific subset of the WJ platform's production run as indicated by the '1987-2000' range, likely covering the early to mid-WJ phase and potentially overlapping with the end of the ZJ generation.
