Engine Mechanical:
Engine assembly, disassembly, inspection, repair, overhaul for all variants
Engine Electrical:
Ignition system, starting system, charging system, sensor diagnostics, ECM operation
Fuel System:
Fuel delivery, injection systems (MPI), fuel tanks, lines, pumps, diagnostics
Cooling System:
Radiator, water pump, thermostat, fan clutch, coolant types, flush and fill procedures
Exhaust System:
Exhaust manifolds, catalytic converters, mufflers, pipes, oxygen sensors
Transmission Manual:
NV3500, NV4500 (if applicable), clutch system, gear selection, repair procedures
Transmission Automatic:
42RE, 44RE, 46RE, 47RE (depending on engine), hydraulic control, torque converter, valve body, rebuild
Drivetrain 4X4:
Transfer case operation (NV235, NV241HD, NV243HD), front axle engagement, service procedures
Drivetrain Rear Axle:
Differential assembly, axle shafts, bearings, seals, fluid specifications, gear ratios
Suspension Front:
Independent front suspension (IFS) components, control arms, ball joints, torsion bars, shocks, alignment specifications
Suspension Rear:
Leaf spring system, shock absorbers, axle housing, suspension geometry
Steering System:
Power steering pump, gearbox, steering column, tie rods, linkage, fluid requirements
Braking System:
Front disc brakes, rear drum or disc brakes (depending on model), ABS system, hydraulic lines, master cylinder, calipers, wheel cylinders, rotor/pad replacement, bleeding procedures
Electrical System Chassis:
Wiring diagrams, lighting, horn, wipers, power windows, mirrors, door locks
HVAC System:
Air conditioning, heating, blower motor, climate control, refrigerant servicing
Body And Frame:
Body panel removal/installation, structural components, chassis diagnostics, exterior trim
Interior Trim:
Seat removal, dashboard disassembly, headliner, door panels, carpet
Restraint System:
Airbag system operation, SRS components, diagnostic codes
Diagnostics Troubleshooting:
OBD-II system, diagnostic trouble codes (DTCs), wiring schematics, diagnostic flowcharts
Routine Maintenance:
Oil changes, filter replacements, fluid checks and top-offs, tire rotations, spark plug replacement
Major Repairs:
Engine rebuilds, transmission overhauls, suspension component replacement, brake system repairs
Component Replacement:
Alternator, starter, water pump, fuel pump, power steering pump, AC compressor
Alignment Procedures:
Front and rear wheel alignment specifications and adjustment methods
Diagnostics And Testing:
Step-by-step diagnostic procedures for common and intermittent faults
Torque Specifications:
Detailed torque values for all critical fasteners
Schematic Diagrams:
Comprehensive electrical wiring diagrams for all systems
Depth Level:
Factory-level, suitable for professional technicians and experienced DIYers
Diagnostic Capabilities:
Detailed diagnostic trees and troubleshooting guides for complex issues
Rebuild Instructions:
Complete instructions for rebuilding major components like engines and transmissions
Oil Change Interval:
Typically 3,000-7,500 miles depending on oil type and driving conditions (refer to manual for specifics)
Transmission Fluid Change:
Around 30,000-60,000 miles for automatic transmissions, depending on use
Spark Plug Replacement:
Often 100,000 miles for V8 Magnum engines (refer to specific engine type)
Engine Oil V8:
API SN or SP, SAE 5W-30 or 10W-30 (check manual for specific engine/climate recommendation)
Engine Oil Cummins:
API CJ-4 or CK-4, SAE 15W-40 (specifically for diesel engines)
Coolant Type:
HOAT (Hybrid Organic Acid Technology) or OAT (Organic Acid Technology) coolant, typically Mopar OAT or equivalent, P-HOAT for some engines
4.7L V8 Issues:
Cylinder head casting porosity, cracked spark plugs, oil filter bypass valve leaks.
5.9L Cummins Issues:
VP44 injection pump failures (often due to low fuel pressure or contaminated fuel), camshaft position sensor issues, potential for injector line leaks.
Automatic Transmission Issues:
Overdrive planetary gear failure in 47RE/48RE under heavy load, solenoid pack issues.
Front Suspension Issues:
Wear in ball joints, tie rod ends, and steering box due to heavy vehicle weight and usage.