Engine Mechanical:
Complete disassembly, inspection, and reassembly of all engine variants
Engine Management:
Fuel injection systems (MPI/TBI), ignition systems, emissions controls, sensor diagnostics
Transmission Manual:
Clutch, gearbox, shifter mechanisms, maintenance, and repair
Transmission Automatic:
Torque converter, planetary gearsets, valve body, solenoids, maintenance, and repair
Drivetrain:
Transfer case (Command-Trac, Selec-Trac, NP231, NP242), drive shafts, axles, differentials, U-joints
Suspension:
Front and rear suspension components, springs, shocks, bushings, alignment specifications
Steering:
Steering gear, power steering pump, linkages, column, troubleshooting
Brakes:
Front and rear brake systems (disc/drum), ABS (if equipped), hydraulic system, parking brake
Electrical System:
Battery, charging system, starting system, lighting, fuses, relays, accessories
Body And Chassis:
Body panels, doors, windows, interior trim, bumpers, frame structural integrity
HVAC:
Heating, ventilation, and air conditioning system diagnosis and repair
Cooling System:
Radiator, water pump, thermostat, hoses, fan clutch, coolant specifications
Fuel System:
Fuel tank, pump, lines, filter, injectors, carburetor (early models)
Exhaust System:
Exhaust manifold, catalytic converter, muffler, pipes, hangers
Routine Maintenance:
Oil changes, filter replacements, fluid checks and changes, tire rotation, tune-ups
Troubleshooting:
Systematic diagnosis of common and uncommon problems, symptom analysis
Engine Repair:
Head gasket replacement, piston ring replacement, bearing replacement, timing belt/chain service
Transmission Repair:
Component replacement, seal and gasket renewal, clutch adjustment/replacement
Brake Service:
Pad and rotor replacement, caliper overhaul, brake bleeding, drum shoe replacement
Electrical Diagnostics:
Wiring diagram interpretation, circuit testing, component testing
Body Repair:
Panel alignment, dent repair, rust prevention and repair, glass replacement
Suspension And Steering Repair:
Ball joint replacement, shock/strut replacement, tie rod end replacement, power steering fluid flush
HVAC Repair:
Refrigerant system evacuation/recharge, component replacement (compressor, evaporator, heater core)
Depth Of Information:
Complete factory-level detail, suitable for professional mechanics and experienced DIYers
Illustrations:
Hundreds of photos, drawings, and diagrams for clarity
Detail Level:
Step-by-step instructions, including detailed substeps and critical notes, cautions, and warnings
Wiring Diagrams:
Comprehensive and detailed electrical schematics for all systems
Diagnostic Tools:
Information on using diagnostic tools and interpreting sensor data (where applicable to the era)
Oil Change Interval:
Typically 3,000-5,000 miles or 6 months, depending on oil type and driving conditions (refer to manual for specifics)
Transmission Fluid Change:
Refer to manual; often around 30,000-60,000 miles for automatic, manual clutch fluid checks
Coolant Flush:
Typically every 30,000-60,000 miles or 2-3 years
Engine Oil Type:
Refer to manual; typically 10W-30 or 10W-40 for gasoline engines, specific grades for diesel
Transmission Fluid Type Auto:
ATF+3 / ATF+4 (later spec) or equivalent for AW4, ATF DEXRON-II for earlier automatics
Transfer Case Fluid:
Refer to manual; often Mopar T-Case Fluid or equivalent
Coolant Type:
Ethylene glycol-based coolant, Mopar 5/150 or equivalent
Common Problems:
Renix EFI system issues (early 4.0L), head gasket leaks (pre-1991 4.0L), interior trim degradation, rust (especially on body panels and frame components), worn suspension bushings, alternator failures
Specific Engine Concerns:
4.0L 'Crackle Tube' issue on Renix EFI, camshaft wear on some early models