Target Audience:
Off-road enthusiasts, utility vehicle buyers, Jeep brand loyalists.
Key Competitors:
Ford Bronco II, Chevrolet S-10 Blazer, Toyota 4Runner, Nissan Pathfinder.
Unique Selling Proposition:
Renowned Jeep off-road capability, iconic styling, durable construction, powerful inline-six engine.
Body Styles:
2-door and 4-door SUV.
Drivetrain Options:
Part-time 4WD (Command-Trac), Selec-Trac full-time 4WD, 2WD RWD.
Suspension Design:
Solid rear axle with leaf springs, front solid axle (early models) transitioning to independent front suspension (IFS) on later models (note: manual covers XJ which predominantly features leaf spring rear and coil spring front solid axle design with track bar, early models had simpler front leaf springs).
Engine Mechanical:
Engine assembly, disassembly, component diagnosis, overhaul procedures for both 2.5L and 4.0L engines.
Fuel System:
Fuel pump, injectors, fuel pressure regulator, fuel tank, lines, diagnosis and repair.
Cooling System:
Radiator, water pump, thermostat, hoses, coolant specifications, diagnosis.
Exhaust System:
Catalytic converter, mufflers, pipes, exhaust manifold, diagnosis and replacement.
Ignition System:
Spark plugs, ignition coils, distributor (if applicable), wiring, diagnosis.
Emission Control:
EGR system, PCV system, evaporative emission control (EVAP), diagnosis.
Transmission Manual:
Clutch, gearbox disassembly, assembly, repair, fluid specifications.
Transmission Automatic:
Transmission assembly, disassembly, torque converter, valve body, solenoids, fluid specifications, diagnosis.
Transfer Case:
Selec-Trac and Command-Trac system service, fluid specifications, diagnosis.
Driveshafts Axles:
Front and rear driveshafts, universal joints, CV joints, axle shafts, bearings, seals, diagnosis.
Suspension Front:
Leaf springs, shock absorbers, bushings, control arms (early models), ball joints, steering linkage, alignment specifications.
Suspension Rear:
Leaf springs, shock absorbers, bushings, axle mounts, alignment specifications.
Steering System:
Steering gearbox, power steering pump, hoses, steering column, tie rods, diagnosis.
Brake System:
Front disc brakes, rear drum brakes (common), ABS components (if equipped), master cylinder, brake lines, calipers, wheel cylinders, bleeding procedures, specifications.
Electrical System:
Wiring diagrams, battery, alternator, starter, lighting, fuses, relays, diagnostic procedures.
Body Chassis:
Body panel removal and installation, door mechanisms, glass, interior trim, underbody protection, rust repair considerations.
HVAC System:
Air conditioning, heating, ventilation, blower motor, evaporator, condenser, refrigerant handling.
Interior Systems:
Seats, seat belts, dashboard, instrument cluster, console.
Routine Maintenance:
Oil changes, filter replacements, fluid checks and top-offs, lubrication.
Troubleshooting:
Diagnostic flowcharts, symptom-based troubleshooting for all major systems.
Component Replacement:
Detailed step-by-step instructions for replacing virtually every component.
Rebuild Procedures:
Overhaul instructions for engines, transmissions, and differentials.
Diagnostic Techniques:
On-board diagnostics (OBD I), scan tool usage (where applicable), multimeter usage, pressure testing.
Specifications Charts:
Torque specifications, clearances, fluid capacities, electrical specifications.
Wiring Diagrams:
Comprehensive electrical schematics for various vehicle configurations.
Depth:
Factory-level detail suitable for professional technicians and experienced DIYers.
Diagnostic Tools:
Covers use of common diagnostic tools and specialized equipment.
Special Tools:
Identifies specific tools required for certain procedures.
Oil Change Interval:
Every 3,000-5,000 miles or 6 months, whichever comes first (depending on oil type and driving conditions).
Transmission Fluid Change:
Every 30,000-60,000 miles for automatic transmissions (AW4, 42RE); manual transmissions as per inspection or leak repair.
Coolant Flush:
Every 30,000 miles or 2 years.
Engine Oil 2.5L:
API SG/SH, SAE 10W-30 or 10W-40 (check manual for specific viscosity based on temperature).
Engine Oil 4.0L:
API SG/SH, SAE 10W-30 (check manual for specific viscosity).
Automatic Transmission Fluid:
Dexron III (or equivalent like Mercon) for AW4 and 42RE transmissions.
Manual Transmission Fluid:
GL-4 rated gear oil, SAE 75W-90 (for NV3550) or ATF for AX-4.
Transfer Case Fluid:
ATF+4 or Dexron III for NP231/NP242.
Coolant:
Ethylene glycol coolant, 50/50 mix with distilled water.
Common Issues 4.0L:
Head gasket leaks, cracked cylinder heads (pre-1995 4.0L HO), oil filter adapter housing leaks, distributor O-ring leaks.
Common Issues 2.5L:
Less power, potential overheating under load, starter issues.
Common Issues Transmission:
AW4 torque converter shudder/lockup issues, manual transmission synchro wear.
Common Issues Suspension Steering:
Worn leaf spring bushings, cracked track bar bushings, play in steering box, worn tie rod ends.
Common Issues Electrical:
Failing alternator, window regulator issues, intermittent electrical gremlins related to ground points.
Common Issues Rust:
Rust is a significant concern, particularly on rocker panels, rear quarter panels, and tailgate.
