Engine Mechanical:
All aspects of 2.5L I-4 and 4.0L I-6 engines, including disassembly, assembly, inspection, and overhaul.
Engine Fuel System:
Fuel injection systems (MPI), fuel pump, fuel injectors, fuel pressure regulator, fuel lines, and diagnostic procedures.
Cooling System:
Radiator, water pump, thermostat, hoses, fan (mechanical and electric), coolant specifications, and troubleshooting.
Lubrication System:
Oil pump, oil filter, oil pan, oil passages, lubrication specifications, and oil change procedures.
Ignition System:
Spark plugs, ignition coils, distributor (early models), crankshaft position sensor, camshaft position sensor, and timing.
Exhaust System:
Exhaust manifolds, catalytic converter, mufflers, pipes, oxygen sensors, and related components.
Transmission Manual:
NV2500, NV3550 (later years) - clutch, gearbox, shift linkage, and maintenance.
Transmission Automatic:
Select-A-Ride, NP242, NP231 transfer cases - removal, installation, internal repair, fluid specifications.
Driveline:
Driveshafts, U-joints, CV joints, axle shafts, differentials, and propeller shafts.
Front Suspension:
Solid front axle (Dana 30), control arms, coil springs, shock absorbers, sway bar, ball joints, and steering linkage.
Rear Suspension:
Leaf spring solid axle, shock absorbers, sway bar, bushings, and trailing arms.
Steering:
Power steering system, steering column, steering gear, tie rods, and steering damper.
Brakes Front:
Disc brakes, calipers, rotors, brake pads, brake lines, and ABS (where applicable).
Brakes Rear:
Drum brakes or disc brakes (depending on trim/year), brake shoes, drums, brake lines, and parking brake system.
Electrical System Charging:
Alternator, voltage regulator, battery, and wiring.
Electrical System Starting:
Starter motor, starter solenoid, ignition switch, and related circuits.
Electrical System Lighting:
Headlights, taillights, interior lighting, fog lights, and related switches/relays.
Electrical System Accessories:
Power windows, power door locks, mirrors, radio, HVAC controls, and related wiring harnesses.
Body Exterior:
Body panels, doors, hood, tailgate, bumpers, trim, glass, and weatherstripping.
Body Interior:
Seats, dashboard, interior trim, carpeting, headliner, and seat belts.
HVAC:
Heating, ventilation, air conditioning system components, controls, refrigerant, and troubleshooting.
Scheduled Maintenance:
Detailed procedures for oil changes, filter replacements, fluid checks and changes, tune-ups, and inspections.
Diagnostic Troubleshooting:
Systematic diagnostic flowcharts and procedures for identifying and resolving common and uncommon faults.
Repair Overhaul:
Step-by-step instructions for component removal, disassembly, repair, reassembly, and installation.
Recalibration Adjustment:
Procedures for adjusting brakes, clutch, steering, and other critical components.
Electrical Troubleshooting:
Wiring diagrams, component testing, circuit tracing, and diagnosis of electrical issues.
Body Repair:
Procedures for dent repair, panel replacement, rust repair, and glass replacement.
Lubrication Points:
Specific lubrication points and recommended lubricants for various chassis components.
Depth Level:
Comprehensive: Covers from basic maintenance to full engine and transmission rebuilds, including advanced diagnostics.
Diagnostic Tools:
Mentions necessary special tools, torque wrenches, and diagnostic equipment.
Wiring Diagrams:
Includes detailed electrical wiring diagrams for all major systems.
Torque Specifications:
Provides torque specifications for all critical fasteners.
Diagnostic Codes:
May include OBD-I (On-Board Diagnostics) codes and diagnostic procedures specific to the era.
Oil Change Interval:
Every 3,000-5,000 miles or 6 months, whichever comes first (recommendation varies by oil type and driving conditions).
Air Filter Replacement:
Every 15,000-30,000 miles or as needed based on inspection.
Spark Plug Replacement:
Every 30,000-60,000 miles (depending on plug type: copper, platinum, or iridium).
Coolant Flush:
Every 30,000-50,000 miles or 2-3 years.
Engine Oil Spec:
10W-30 or 10W-40 for 4.0L I-6; 5W-30 or 10W-30 for 2.5L I-4 (refer to manual for exact API service classification).
Engine Oil Capacity:
4.0L I-6: 5 quarts (4.7 liters); 2.5L I-4: 5 quarts (4.7 liters) with filter change.
Coolant Type:
Ethylene Glycol based, typically green in color. Mopar Antifreeze/Coolant (OAT or HOAT) is recommended. Refer to manual for specific type.
Brake Fluid Spec:
DOT 3 or DOT 4; refer to manual for exact specification.
Common Problems Engine:
Head gasket leaks (especially 4.0L), oil filter adapter leaks, cracked exhaust manifolds (4.0L), CPS (Crankshaft Position Sensor) failures.
Common Problems Suspension Steering:
Worn ball joints, tie rod ends, and steering stabilizer; leaf spring sag in the rear.
Common Problems Electrical:
Corroded grounds, faulty ignition switch, power window regulator failures, interior wiring harness issues.
Common Problems Body:
Rust in rocker panels, floor pans, and rear quarter panels; tailgate rust; door handle failures.