Engine Mechanical:
Detailed overhaul procedures for 2.5L (AMC 150) and 4.0L (AMC 242) inline engines, including disassembly, inspection, repair, and reassembly of cylinder heads, blocks, pistons, crankshafts, camshafts, and valvetrain.
Fuel System:
Covers fuel delivery, injection systems (MPI), fuel pumps, injectors, fuel pressure regulators, and evaporative emissions control (EVAP).
Ignition System:
Diagnosis and repair of electronic ignition systems, spark plugs, coils, distributors (where applicable in early years), and control modules.
Cooling System:
Radiator, water pump, thermostat, coolant hoses, fan, and fan clutch servicing and repair.
Lubrication System:
Oil pump, oil pan, oil filter, and lubrication passages, including oil change procedures and specifications.
Exhaust System:
Catalytic converter, mufflers, exhaust pipes, and oxygen sensors.
Transmission Manual:
Service and repair for NV1500, NV3550, and AX-15 manual transmissions. Includes clutch system, gearbox disassembly, and component replacement.
Transmission Automatic:
Service and repair for AW4 (Aisin-Warner) and 32RH (Chrysler) automatic transmissions. Covers torque converter, valve body, planetary gears, and electronic controls.
Drivetrain Transfer Case:
Service for Selec-Trac (242) and Command-Trac (231) transfer cases, including chain wear, seal replacement, and fluid capacities.
Drivetrain Axles:
Dana 30 (front) and Dana 35c/AMC 20 (rear) axle servicing, including differential overhaul, gear pattern checks, bearings, and seals.
Suspension Front:
Leaf spring (early models) and coil spring suspension systems. Ball joints, control arms, shock absorbers, and steering stabilizer servicing.
Suspension Rear:
Leaf spring suspension servicing, shock absorbers, and axle housing alignment.
Steering System:
Power steering pump, gearbox, tie rods, drag link, and steering column repair and adjustment.
Brake System:
Front disc and rear drum brakes. Hydraulic system, master cylinder, power booster, caliper and wheel cylinder overhaul, brake pad/shoe replacement, and brake fluid specifications.
Anti Lock Brakes:
Diagnosis and repair for ABS systems (if equipped).
Electrical System Power:
Battery, alternator, starter motor, charging system diagnosis and repair.
Electrical System Lighting:
Headlights, taillights, interior lights, and accessory lighting circuits.
Electrical System Instruments:
Dashboard gauges, warning lights, and instrument cluster servicing.
Electrical System Wiring Diagrams:
Detailed wiring schematics for all major vehicle systems.
HVAC System:
Air conditioning compressor, condenser, evaporator, blower motor, heater core, and climate control system.
Body Exterior:
Door panel removal, body panel alignment, tailgate, liftgate, and bumper servicing.
Body Interior:
Seat removal, dashboard trim, headliner, and carpet replacement.
Body Glass:
Windshield, side glass, and rear window replacement.
Emissions Control:
EGR system, PCV system, and secondary air injection (if equipped) diagnosis and repair.
Routine Maintenance:
Oil changes, filter replacements, fluid checks and top-offs, tire rotation, and lubrication.
Engine Repair:
Complete engine overhaul, piston ring replacement, bearing replacement, cylinder head gasket replacement, timing chain/belt replacement (chain for XJ).
Transmission Repair:
Clutch replacement, transmission fluid and filter changes, internal transmission component replacement.
Brake Service:
Brake pad and rotor/drum replacement, caliper and wheel cylinder seal replacement, brake bleeding.
Electrical Diagnostics:
Troubleshooting of electrical faults, wiring harness repair, component testing, fuse and relay diagnosis.
Suspension And Steering Alignment:
Wheel alignment procedures, ball joint replacement, tie rod end replacement, power steering system repair.
Diagnostic Trouble Codes:
OBD-I and OBD-II (later models) diagnostic procedures, DTC lookup, and interpretation.
Body And Interior Repair:
Door mechanism repair, window regulator replacement, trim panel installation, dent repair guidance.
Depth:
In-depth, professional-level coverage suitable for experienced DIY mechanics and professional technicians. Includes detailed specifications, torque values, diagnostic flowcharts, and component testing procedures.
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 specifics.
Coolant Flush:
Every 30,000 miles (48,000 km) or 2-3 years. Consult manual for specific coolant type.
Transmission Fluid Change:
Every 30,000-50,000 miles (48,000-80,000 km). Refer to manual for specific fluid type and capacity.
Engine Oil 2.5L:
API Service SG or higher, SAE 10W-30. Capacity: 5 US quarts (4.7 L) with filter.
Engine Oil 4.0L:
API Service SG/SH or higher, SAE 10W-30 (preferred) or 10W-40. Capacity: 6 US quarts (5.7 L) with filter.
Coolant:
Chrysler/Mopar Antifreeze/Coolant (Green) or equivalent, 50/50 mix with distilled water.
Transmission Fluid Aw4:
Dexron III/Mercon ATF. Capacity: 3.2 US quarts (3.0 L) dry fill.
Transmission Fluid Ax-15:
GL-3 or GL-4 gear oil, SAE 75W-90. Capacity: 2.2 US quarts (2.1 L).
Differential Fluid:
API GL-5 gear oil, SAE 75W-90 (front and rear axles). Capacity varies, approx. 1.5-2.0 US quarts per axle.
Common Problems 4.0L:
Head gasket failure (earlier 4.0L engines), cracked cylinder heads (later 4.0L), intake manifold gasket leaks, rear main seal leaks, death wobble (suspension/steering linkage wear).
Common Problems 2.5L:
Less powerful, can be prone to overheating if cooling system is neglected, clutch wear.
General Wear Items:
Leaf springs (sagging), U-joints, brake components, exhaust systems, radiators, water pumps.