Engine Mechanical:
Complete overhaul, diagnosis, and repair of all engine variants.
Fuel System:
Fuel injection, fuel pump, lines, and tank service.
Ignition System:
Spark plugs, ignition coil, distributor, and electronic control unit (ECU) diagnostics.
Cooling System:
Radiator, water pump, thermostat, heater core, and fan clutch service.
Exhaust System:
Catalytic converter, muffler, exhaust manifold, and pipe repair.
Transmission Manual:
Clutch, gearbox overhaul, and linkage adjustment.
Transmission Automatic:
Torque converter, valve body, planetary gears, and electronic control diagnostics.
Drivetrain 4X4:
Transfer case (NP231/NP242) service, front/rear axle components, U-joints, CV joints.
Suspension Front:
Leaf springs, control arms, shocks, steering stabilizer.
Suspension Rear:
Leaf springs, shock absorbers.
Steering System:
Power steering pump, rack and pinion, tie rods, steering column.
Brake System Front:
Disc brake pads, rotors, calipers, lines.
Brake System Rear:
Drum brake shoes, wheel cylinders, drums, parking brake.
Electrical System Charging:
Alternator, voltage regulator, battery testing and replacement.
Electrical System Lighting:
Headlights, taillights, interior lights, bulbs, and wiring.
Electrical System Accessories:
Wipers, horn, power windows, locks, mirrors, and related switches/motors.
Body Control Modules:
Fuse box, relays, wiring diagrams for all circuits.
Climate Control:
A/C system, heater core, blower motor, climate control panel operation and repair.
Interior Trim:
Dashboard, door panels, upholstery, and carpet removal/installation.
Exterior Body:
Body panel alignment, door hinges, tailgate, bumper repair, rust prevention.
Glass And Seals:
Windshield, side windows, rear window replacement and seal service.
Routine Maintenance:
Oil changes, filter replacements, fluid checks, tire rotations.
Engine Repair:
Head gasket replacement, piston ring installation, valve adjustments, timing chain/belt service.
Transmission Overhaul:
Complete disassembly, inspection, and reassembly of both manual and automatic transmissions.
Drivetrain Diagnosis:
Troubleshooting driveline vibrations, binding, or engagement issues.
Suspension Replacement:
Shock absorber, leaf spring, ball joint, and tie rod end replacement.
Brake Service:
Brake pad/shoe replacement, rotor/drum resurfacing or replacement, brake bleeding.
Electrical Troubleshooting:
Wiring harness repair, circuit diagnosis, component testing.
Climate Control Repair:
A/C refrigerant service, leak detection, blower motor replacement, heater core flush.
Body Panel Alignment:
Adjusting doors, hood, tailgate for proper fit and sealing.
Troubleshooting Guides:
Systematic diagnostic procedures for common and uncommon faults.
Component Rebuilds:
Detailed instructions for rebuilding major components.
Depth:
Comprehensive, from basic maintenance to complete engine and transmission rebuilds.
Diagnostic Charts:
Extensive diagnostic trouble trees and symptom-based troubleshooting.
Torque Specifications:
All critical torque values for fasteners and assemblies.
Schematics:
Detailed electrical wiring diagrams for all systems.
Special Tools:
Identification and usage of required factory special tools.
Oil Change Interval:
Every 3,000-5,000 miles or 3-6 months (depending on driving conditions).
Filter Replacement Interval:
Engine oil filter: Every oil change. Air filter: 15,000-30,000 miles. Fuel filter: 30,000-50,000 miles.
Transmission Fluid Interval:
Automatic: 30,000-60,000 miles. Manual: Check for leaks, typically no scheduled change.
Coolant Flush Interval:
Every 30,000 miles or 2 years.
Engine Oil Type:
SAE 10W-30 or 10W-40 (check owner's manual for specific engine recommendation).
Engine Oil Capacity:
4.0L I6: 5 US quarts (4.7 L) with filter. 2.5L I4: 5 US quarts (4.7 L) with filter.
Transmission Fluid Type:
ATF+3 (or equivalent red automatic transmission fluid).
Coolant Type:
Conventional green ethylene glycol coolant (50/50 mix with distilled water).
Common Failure 1:
Radiator cracking (especially the plastic end tanks).
Common Failure 2:
Leaf spring sag and breakage due to age and load.
Common Failure 3:
Headliner sagging.
Common Failure 4:
Cracked exhaust manifolds on the 4.0L engine.
Common Failure 5:
Oil filter adapter seal leaks.
Common Failure 6:
Water pump and thermostat housing leaks.
Common Failure 7:
Power steering pump whine and leaks.