Engine Mechanical:
Full disassembly, inspection, repair, and reassembly of all engine components for all specified variants.
Fuel System:
Fuel injection (MPI), fuel pump, fuel pressure regulator, injectors, fuel lines, fuel tank servicing.
Ignition System:
Spark plugs, ignition coils, distributor (if applicable), ignition control module, wiring, timing adjustments.
Cooling System:
Radiator, water pump, thermostat, heater core, cooling fan (electric/mechanical), coolant types and capacities.
Exhaust System:
Exhaust manifolds, catalytic converter, mufflers, pipes, hangers, gaskets, emissions control components.
Transmission Manual:
Clutch, gearbox internal components, shift linkages, fluid types, capacities, and service procedures.
Transmission Automatic:
Torque converter, valve body, internal gear sets, seals, solenoids, fluid types, capacities, and service procedures.
Drivetrain 4Wd:
Transfer case (NP231, NP242), front and rear driveshafts, U-joints, axle assemblies, hub locking mechanisms.
Steering System:
Power steering pump, steering gear (steering box), tie rods, drag link, steering column, alignment procedures.
Suspension System:
Front (leaf spring, solid axle), rear (leaf spring, solid axle), shock absorbers, bushings, control arms, sway bars.
Brake System:
Front disc brakes, rear drum brakes (and some rear disc variants), master cylinder, brake booster, ABS (if equipped), bleeding procedures, component replacement.
Electrical System Charging:
Alternator, voltage regulator, battery, starter motor, wiring diagrams, charging system diagnostics.
Electrical System Lighting:
Headlights, taillights, interior lights, turn signals, hazard lights, bulb specifications, wiring.
Electrical System Instruments:
Dashboard gauges, warning lights, instrument cluster removal and repair.
Body And Chassis:
Body panel removal and installation, frame straightening, rust repair, interior trim, door mechanisms, glass replacement.
HVAC System:
Air conditioning compressor, condenser, evaporator, heater core, blower motor, controls, refrigerant types and procedures.
Safety Systems:
Airbags (if equipped), seat belts, child restraint systems, crashworthiness information.
Routine Maintenance:
Oil changes, filter replacements, fluid checks and top-offs, tire rotations, spark plug replacement, battery maintenance.
Troubleshooting:
Systematic diagnostic procedures for common and uncommon problems, symptom-based troubleshooting guides.
Component Replacement:
Step-by-step instructions for replacing virtually any component on the vehicle.
Engine Rebuilding:
Detailed instructions for complete engine overhaul, including specifications for machining and clearances.
Transmission Overhaul:
Comprehensive guides for the disassembly, repair, and reassembly of both manual and automatic transmissions.
Electrical Diagnostics:
Detailed wiring diagrams, component testing procedures, and troubleshooting for electrical faults.
Suspension And Steering Alignment:
Alignment specifications and procedures for both front and rear suspensions.
Brake System Repair:
Pad/shoe replacement, rotor/drum service, caliper/wheel cylinder rebuild, brake bleeding.
Depth:
Expert-level, covering everything from basic maintenance to complete factory-level rebuilds and diagnostics.
Diagnostic Tools:
Information pertaining to OBD-I and OBD-II diagnostic procedures and common fault codes for the era.
Torque Specifications:
Precise torque values for all fasteners throughout the vehicle.
Clearances And Tolerances:
Specifications for critical engine and drivetrain component clearances.
Oil Change Interval:
Every 3,000-5,000 miles (4,800-8,000 km) or 6 months, depending on driving conditions (refer to manual for precise intervals).
Transmission Fluid Change:
Automatic: Every 30,000-60,000 miles (48,000-96,000 km) or as recommended by severe duty cycles. Manual: Inspect periodically, change if contaminated or worn.
Coolant Flush:
Every 30,000-50,000 miles (48,000-80,000 km) or 2-3 years.
Engine Oil 4.0L:
API SJ or higher, SAE 10W-30 conventional or synthetic.
Engine Oil 2.5L:
API SJ or higher, SAE 5W-30 or 10W-30 conventional or synthetic.
Transmission Fluid Aw4:
ATF+3 or ATF+4 (Chrysler/Mopar Specification).
Transmission Fluid Ax-5:
GL-3 or GL-4 gear oil, SAE 75W-90 or 80W-90.
Coolant:
Chrysler/Mopar Antifreeze/Coolant (50/50 mix with distilled water), or equivalent HOAT coolant.
Power Steering Fluid:
ATF+3 or ATF+4 (Chrysler/Mopar Specification).
Cooling System Leaks:
Common issues include radiator leaks, water pump failures, and heater core leaks, particularly with age.
Engine Mounts:
Engine mounts can degrade over time, leading to vibrations and clunking noises.
Leaf Spring Sag:
Rear leaf springs can sag due to age and load, impacting ride height and load-carrying capacity.
Rust And Corrosion:
Vulnerable areas include rocker panels, floor pans, and wheel wells, especially in regions with road salt.
Power Steering Pump Leaks:
The power steering pump can develop leaks, typically at the shaft seal or reservoir.