Engine Mechanical:
4.0L I6, 5.2L V8, 5.9L V8: disassembly, assembly, inspection, overhaul, torque specifications, component testing
Engine Performance:
Fuel system, ignition system, emission control systems, cooling system, lubrication system, diagnosis, troubleshooting
Transmission Manual:
NV3550 5-speed manual: overhaul, adjustment, diagnosis, component replacement
Transmission Automatic:
42RE, 46RH, 47RH 4-speed automatic: overhaul, diagnosis, torque converter, shift control, fluid service
Drivetrain:
Front and rear axles (Dana 30, Dana 35, Chrysler 8.25), transfer cases (NV231J, NV242J), driveshafts, CV joints, U-joints: inspection, repair, fluid specifications
Brakes:
Front/rear disc brakes, anti-lock braking system (ABS), brake fluid, hydraulic lines, master cylinder, calipers, rotors, pads: diagnosis, repair, bleeding procedures
Suspension:
Front and rear suspension components, control arms, coil springs, shock absorbers, steering knuckles, stabilizer bars, bushings: inspection, replacement, alignment specifications
Steering:
Power steering system, steering gear, steering column, tie rods, drag links, power steering fluid: diagnosis, repair, fluid specifications
Electrical System:
Battery, charging system (alternator), starting system (starter), ignition switch, fuses, relays, wiring diagrams, lighting system, instrumentation
Body And Frame:
Body panel removal/installation, doors, windows, interior trim, exterior trim, glass replacement, frame straightening (if applicable), rust repair procedures
HVAC:
Heating, ventilation, air conditioning system: refrigerant types, charging, compressor, condenser, evaporator, blower motor, controls, diagnosis
Comfort And Convenience:
Power windows, power locks, power seats, remote keyless entry, cruise control, interior lighting, audio system: diagnosis, repair
Restraint Systems:
Airbag system components, seat belts, SRS module: diagnosis, replacement procedures, safety precautions
Maintenance:
Scheduled maintenance, oil changes, filter replacements, fluid checks and changes, spark plug replacement, belt replacement
Troubleshooting:
Diagnostic flowcharts, symptom-based troubleshooting guides, common problem identification
Repair:
Component removal, installation, adjustment, and overhaul for all major systems
Diagnostics:
OBD-II diagnostic codes, sensor testing, module testing, wiring checks
Wiring Diagrams:
Detailed electrical schematics for all vehicle systems
Depth Of Coverage:
Comprehensive: from basic maintenance to complete engine and transmission rebuilds
Diagnostic Procedures:
Advanced diagnostic procedures, including multimeter usage, oscilloscope interpretation, and scan tool data analysis
Specification Tables:
Extensive tables of torque specifications, clearances, fluid capacities, and electrical values
Standard Transmission Type:
NV3550 5-speed manual (standard on some 4.0L models)
Optional Transmission Type 1:
42RE 4-speed automatic (standard on most 4.0L models)
Optional Transmission Type 2:
46RH 4-speed automatic (optional on 5.2L models)
Optional Transmission Type 3:
47RH 4-speed automatic (optional on 5.9L models)
Transmission Fluid Spec Automatic:
ATF+3 (Chrysler MS-9229) or equivalent
Transmission Fluid Spec Manual:
API GL-4 SAE 75W-90 synthetic gear lubricant
Oil Change Interval Synthetic:
7,500 miles or 6 months (recommended with synthetic oil)
Oil Change Interval Conventional:
3,000 miles or 3 months (conventional oil)
Transmission Fluid Change Automatic:
30,000 - 60,000 miles (depending on driving conditions)
Transfer Case Fluid Change:
30,000 - 60,000 miles
Coolant Flush:
30,000 miles or 2 years
Power Steering Fluid:
ATF+3 (Chrysler MS-9229) or equivalent
Common Issue 1:
Cracked cylinder heads (especially 5.2L and 5.9L Magnum engines, though less common in later ZJ models than earlier ones)
Common Issue 2:
Transmission cooler line leaks or blockages leading to overheating
Common Issue 3:
Worn steering components (tie rod ends, ball joints) due to vehicle weight and off-road use
Common Issue 4:
Minor electrical gremlins (e.g., interior lights, power windows) due to age and wiring harness wear
Common Issue 5:
Front and rear differential pinion seal leaks