Engine Mechanical:
Engine assembly, cylinder heads, valvetrain, pistons, crankshaft, connecting rods, lubrication system, cooling system, timing system, engine diagnostics.
Engine Performance:
Fuel injection systems (MPI), ignition system, exhaust system, emissions control systems.
Transmission Manual:
Manual transmission (NV3500, NV4500) removal, installation, overhaul, clutch system.
Transmission Automatic:
Automatic transmission (46RH, 47RH) removal, installation, overhaul, torque converter, valve body, hydraulic systems.
Transfer Case:
NV231, NV241, NV271, NV273 transfer case service, operation, and repair.
Drivetrain Axles:
Front and rear axle assemblies, differential service, axle shafts, universal joints, CV joints.
Suspension:
Front suspension (independent), rear suspension (leaf springs), shock absorbers, ball joints, control arms, bushings, steering knuckles, alignment procedures.
Steering:
Power steering system, steering gear, steering column, tie rods, linkage, steering wheel, power steering pump and reservoir.
Brakes:
Front disc brakes, rear drum brakes (or disc), brake system components, hydraulic lines, master cylinder, brake booster, ABS system (if equipped), parking brake.
Electrical System:
Battery, charging system (alternator, regulator), starting system (starter motor), lighting system, ignition system, power distribution, fuses, relays.
Instrument Panel Gauges:
Instrument cluster, gauges, warning lights, diagnostic indicators.
Body Interior:
Interior trim, seats, dashboard, headliner, door panels, carpeting, HVAC controls.
Body Exterior:
Body panels, doors, hood, tailgate, bumpers, glass, mirrors, exterior trim, paint and finish.
HVAC System:
Heating, ventilation, and air conditioning (HVAC) system components, refrigerant handling, compressor, evaporator, condenser, blower motor.
Fuel System:
Fuel tank, fuel pump, fuel lines, fuel filter, fuel injectors, fuel pressure regulator.
Emission Control:
Catalytic converter, oxygen sensors, EGR system, evaporative emission control (EVAP).
Routine Maintenance:
Oil changes, filter replacements, fluid checks and top-offs, tire rotation, brake inspection, battery service.
Troubleshooting:
Diagnostic trouble codes (DTCs), symptom-based troubleshooting guides for all major systems, wiring diagrams.
Repair Procedures:
Step-by-step repair instructions for all mechanical and electrical components, torque specifications, special tool requirements.
Overhaul Rebuild:
Detailed procedures for engine, transmission, and axle assembly disassembly, inspection, and reassembly.
Component Replacement:
Instructions for replacing common wear items such as brake pads, rotors, spark plugs, belts, hoses, and sensors.
Diagnostics:
Information on using diagnostic tools (e.g., OBD-I, OBD-II scan tools), interpreting sensor data, and performing system tests.
Wiring Diagrams:
Comprehensive electrical schematics for all vehicle systems, including power distribution, lighting, engine control, and accessories.
Depth Level:
Comprehensive factory-level detail, covering everything from basic maintenance to complete engine and transmission overhauls.
Diagnostic Capability:
Advanced diagnostic procedures, including live data interpretation and component testing.
Torque Specifications:
Detailed torque values for all critical fasteners throughout the vehicle.
Special Tools:
Identification and usage instructions for specialized tools required for certain repair procedures.
3.9L Magnum V6:
Displacement: 3.9L (239 cu in); Configuration: OHV V6; Bore x Stroke: 3.66 x 3.57 in; Compression Ratio: 8.9:1; Horsepower: 175 hp @ 4800 rpm; Torque: 230 lb-ft @ 3200 rpm; Fuel System: Multi-point Fuel Injection (MPI).
5.2L Magnum V8:
Displacement: 5.2L (318 cu in); Configuration: OHV V8; Bore x Stroke: 3.91 x 3.31 in; Compression Ratio: 8.9:1; Horsepower: 230 hp @ 4800 rpm; Torque: 295 lb-ft @ 3200 rpm; Fuel System: MPI.
5.9L Magnum V8:
Displacement: 5.9L (360 cu in); Configuration: OHV V8; Bore x Stroke: 4.00 x 3.58 in; Compression Ratio: 8.9:1; Horsepower: 245 hp @ 4400 rpm; Torque: 345 lb-ft @ 3200 rpm; Fuel System: MPI.
8.0L Magnum V10:
Displacement: 8.0L (488 cu in); Configuration: OHV V10; Bore x Stroke: 4.00 x 3.88 in; Compression Ratio: 8.4:1; Horsepower: 300 hp @ 4000 rpm; Torque: 450 lb-ft @ 2400 rpm; Fuel System: MPI.
5.9L Cummins Turbo Diesel:
Displacement: 5.9L (359 cu in); Configuration: OHV Inline-6 Turbocharged Diesel; Bore x Stroke: 4.02 x 4.72 in; Compression Ratio: 17.5:1; Horsepower: 160-180 hp @ 2500 rpm (depending on variant); Torque: 400-440 lb-ft @ 1600 rpm (depending on variant); Fuel System: Indirect Injection (IDI) with Bosch VE rotary injection pump, turbocharged.
Engine Type Differences:
Magnum V6/V8/V10 offer good gasoline performance, while the Cummins diesel excels in low-end torque, towing, and fuel economy.
Gasoline Fuel System:
Sequential Multi-Port Fuel Injection (MPI) with an electric fuel pump and fuel filter.
Diesel Fuel System:
Bosch VE rotary injection pump, direct injection into pre-combustion chambers (indirect injection), turbocharger, intercooler (on some models).
Oil Change Interval:
3,000-7,500 miles or 3-6 months (depending on oil type, driving conditions, and engine variant - consult manual for specifics).
Transmission Fluid Change:
Automatic: 30,000-100,000 miles (varies greatly, heavy use requires more frequent changes); Manual: Consult manual, typically 50,000-100,000 miles.
Coolant Change Interval:
Initial fill at factory, then typically every 30,000-50,000 miles for conventional coolant, or longer for extended-life coolants.
Spark Plug Replacement:
Gasoline engines: 30,000-100,000 miles (depending on spark plug type - copper, platinum, iridium).
Diesel Maintenance:
Includes fuel filter replacement (every 15,000-30,000 miles), air filter replacement, oil changes, and coolant service.
Engine Oil Gasoline:
SAE 5W-30 or 10W-30 (API SG or higher, consult manual for exact viscosity based on temperature).
Engine Oil Diesel:
API CG-4 or CH-4 rated diesel engine oil, SAE 15W-40 is common (consult manual for specific Cummins recommendation).
Transmission Fluid Automatic:
ATF+3 or ATF+4 (later spec, often backward compatible) or equivalent Mopar specification.
Transmission Fluid Manual Nv3500:
GM Synchromesh or equivalent manual transmission fluid.
Transmission Fluid Manual Nv4500:
Typically SAE 75W-90 synthetic gear oil.
Coolant:
Ethylene Glycol based coolant, typically a 50/50 mix with distilled water. Mopar OAT (Organic Additive Technology) or HOAT (Hybrid OAT) is recommended for later models, check compatibility for these years.
Brake Fluid:
DOT 3 or DOT 4 brake fluid.
Power Steering Fluid:
ATF Dexron II or III, or Mopar power steering fluid.
Common Issues Gasoline:
Intake manifold gasket leaks, oil filter adapter housing leaks, ignition coil failures, fuel pump failures, EGR valve clogging, occasional transmission solenoid issues.
Common Issues Diesel:
Lift pump failures, injector pump issues (VE pump), injector line leaks, grid heater failures (cold weather starting), exhaust manifold cracking (less common on early models), front seal leaks.
Common Issues Chassis:
Ball joint wear, tie rod end wear, brake component wear, radiator leaks, AC system issues, rear main seal leaks (especially on manual transmissions).