Engine Mechanical:
Detailed overhaul procedures, component identification, specifications, timing, and diagnostics for all major engine variants offered during these years.
Engine Fuel System:
Fuel injection system (EFI) components, fuel pump, injectors, pressure regulator, lines, and diagnostics.
Engine Cooling System:
Radiator, water pump, thermostat, hoses, fan, and coolant specifications.
Engine Ignition System:
Distributor, ignition coil, spark plugs, wires, and timing adjustments.
Engine Exhaust System:
Exhaust manifolds, catalytic converter, mufflers, pipes, and emissions controls.
Transmission Manual:
Repair, overhaul, and specifications for manual transmissions (e.g., Aisin AX-5, AX-15).
Transmission Automatic:
Repair, overhaul, and specifications for automatic transmissions (e.g., AW4).
Drivetrain Transfer Case:
Service and repair of NP231, NP242 (Selec-Trac) transfer cases.
Drivetrain Axles:
Front and rear axle assembly, differentials, bearings, seals, and gear ratio specifications.
Suspension Front:
Leaf spring and shackle configurations, shock absorbers, bushings, and alignment specifications.
Suspension Rear:
Leaf spring and shackle configurations, shock absorbers, bushings, and alignment specifications.
Steering System:
Power steering system components, pump, gearbox, tie rods, and steering linkage.
Brake System:
Front disc and rear drum brake systems, hydraulic lines, master cylinder, proportioning valve, parking brake.
Electrical System Battery Charging:
Battery, alternator, voltage regulator, wiring diagrams.
Electrical System Starting:
Starter motor, starter solenoid, ignition switch.
Electrical System Lighting:
Headlights, taillights, turn signals, interior lighting, and associated switches.
Electrical System Instruments Gauges:
Instrument cluster, speed sensor, tachometer, fuel gauge, temperature gauge, oil pressure gauge.
Body Exterior:
Body panel removal and installation, doors, hood, tailgate, bumpers, trim.
Body Interior:
Seat removal, dashboard disassembly, trim panels, headliner, carpeting.
HVAC System:
Heating, ventilation, and air conditioning (HVAC) system components, blower motor, heater core, A/C compressor, refrigerant.
Emission Control:
Detailed information on emissions control devices and procedures for compliance.
Maintenance Procedures:
Oil changes, filter replacements, fluid checks and changes, spark plug replacement, belt inspection and replacement, brake pad replacement.
Repair Procedures:
Engine rebuilds, transmission overhauls, suspension component replacement, brake caliper replacement, fuel pump replacement.
Troubleshooting:
Diagnostic charts, symptom-based troubleshooting guides for common issues across all systems.
Diagnostics:
Component testing, electrical circuit analysis, diagnostic trouble codes (DTCs) where applicable (OBD-I era).
Wiring Diagrams:
Comprehensive electrical wiring schematics for various circuits and options.
Depth Of Coverage:
Comprehensive, covering everything from basic maintenance to full engine and transmission rebuilds.
Diagnostic Capabilities:
Advanced diagnostic procedures for mechanical and electrical systems, including testing of sensors and actuators.
Specification Detail:
Detailed torque specifications, clearances, fluid capacities, pressures, and electrical resistance values.
Oil Change Interval:
Typically 3,000-5,000 miles or 3-6 months, depending on driving conditions and oil type (refer to manual for exact specifications).
Transmission Fluid Change Interval:
Generally recommended every 30,000-50,000 miles for automatic transmissions, manual transmissions vary (consult manual).
Coolant Flush Interval:
Typically every 2-3 years or 30,000-50,000 miles.
Engine Oil Specification:
Refer to manual for specific viscosity (e.g., 10W-30, 10W-40 for 4.0L, check for 2.8L/2.5L variations). API service classification required.
Transmission Fluid Specification Aw4:
Dexron II or equivalent (ATF).
Manual Transmission Fluid:
Refer to manual for specific gear oil viscosity (e.g., 75W-90, 80W-90 GL-5).
Coolant Specification:
Ethylene glycol based, typically green type. Refer to manual for capacity and type (e.g., Mopar).
Brake Fluid Specification:
DOT 3 or DOT 4 (check manual for exact type).
Common Issues 4.0L:
Cracked cylinder heads (later models), oil filter housing leaks, oil pan gasket leaks, rear main seal leaks, 'Death Wobble' (suspension/steering related).
Common Issues General:
Leaf spring sag, U-joint wear, exhaust manifold cracks (4.0L), electrical connector corrosion, power steering pump noise.
Frequently Replaced Parts:
Water pump, thermostat, radiator, brake pads/rotors, U-joints, ball joints, tie rod ends, alternator, starter motor, fuel pump.