Engine Mechanical:
All engine types, components, internal and external, disassembly, assembly, specifications.
Engine Performance:
Fuel system, ignition system, emissions control systems, cooling system, lubrication system.
Transmission Manual:
Manual transmission systems, including clutch, gearbox, driveline components, disassembly, repair, specifications.
Transmission Automatic:
Automatic transmission systems, including torque converter, valve body, internal components, repair, fluid specifications, diagnostic procedures.
Drivetrain:
Front and rear axles, differentials, transfer case (if applicable), driveshafts, U-joints, wheel bearings.
Suspension System:
Front and rear suspension components, springs, shock absorbers/struts, control arms, steering knuckles, alignment procedures.
Steering System:
Power steering pump, steering gear/rack, tie rods, steering column, alignment specifications.
Brake System:
Front and rear brakes (disc/drum), ABS system, hydraulic lines, master cylinder, calipers/wheel cylinders, rotor/drum specifications, bleeding procedures.
Electrical System:
Battery, charging system (alternator), starting system (starter motor), lighting, fuses, relays, wiring diagrams.
Electronics Control:
ECU/PCM (Engine Control Unit/Powertrain Control Module) diagnostics, sensors, actuators, related control modules.
Climate Control:
HVAC system (heating, ventilation, air conditioning), compressor, condenser, evaporator, refrigerant, blower motor, controls.
Body Interior:
Interior trim, seats, dashboard, door panels, headliner, carpet, insulation.
Body Exterior:
Body panels, doors, hoods, tailgates, bumpers, glass, mirrors, seals, trim, body repair procedures.
Chassis Frame:
Frame construction, crossmembers, mounting points, corrosion protection.
Preventative Maintenance:
Oil changes, filter replacements, fluid checks and top-offs, tire rotations, inspections.
Troubleshooting:
Diagnostic flowcharts, symptom-based troubleshooting guides, identification of common problems.
Component Repair:
Detailed step-by-step instructions for the repair or replacement of virtually all vehicle components.
Diagnostics:
On-Board Diagnostics (OBD-II) system information, diagnostic trouble codes (DTCs), procedures for reading and clearing codes.
Disassembly Assembly:
Complete procedures for removing and reinstalling major and minor components, often with torque specifications.
Wiring Diagrams:
Detailed electrical schematics for all vehicle systems, including power distribution, component locations, and circuit tracing.
Engine Rebuild:
Detailed instructions for complete engine disassembly, inspection, repair, and reassembly, including piston ring gaps, bearing clearances, valve timing, etc.
Torque Specifications:
Crucial torque values for all fasteners to ensure proper assembly and prevent component failure.
Diagnostic Trouble Codes:
Exhaustive list of OBD-II DTCs with descriptions and diagnostic pathways.
Body Repair Procedures:
Guidelines for minor dent repair, panel replacement, and structural component repair.
Level Of Detail:
Comprehensive, covering everything from basic fluid changes to complete engine and transmission overhauls.
Target Audience:
Professional automotive technicians and experienced DIY mechanics.
Oil Change Interval:
Typically every 3,000-7,500 miles or 6 months for gasoline engines, and 7,500-10,000 miles or 6 months for Cummins diesel engines, depending on usage and oil type.
Transmission Service:
Automatic transmission fluid and filter change every 30,000-60,000 miles, depending on towing usage. Manual transmission fluid checks and potential change at higher mileage.
Engine Oil Gasoline:
SAE 5W-20 or 5W-30 API SN, CJ-4 (check owner's manual for exact specs based on engine and temperature).
Engine Oil Diesel:
SAE 15W-40, API CJ-4 (Cummins recommended) or similar heavy-duty diesel engine oil.
Coolant:
Chrysler/Dodge HOAT (Hybrid Organic Acid Technology) or OAT (Organic Acid Technology) coolant, typically Mopar OAT (orange).
Transmission Fluid Auto:
ATF+4 (Automatic Transmission Fluid type 9602) for automatic transmissions.
Transmission Fluid Manual:
API GL-3 or GL-4 gear oil (e.g., SAE 75W-90 or 80W-90) for manual transmissions (specific type depends on gearbox model).
Diesel Injector Problems:
Some 5.9L Cummins models can experience injector issues, particularly the 2003-2004 model years with specific injector types, though less common in these later years.
Automatic Transmission Overheating:
Heavy towing can lead to overheating of the 48RE transmission; an auxiliary transmission cooler is often recommended.
Rear Main Seal Leaks:
Can occur on both diesel and gasoline engines, especially at higher mileage.
Front Suspension Wear:
Ball joints, tie rod ends, and steering linkage components can experience wear due to the vehicle's weight and typical use.
Oil Filter Cummins:
Fleetguard LF16035 or equivalent (e.g., Mopar 05013361AA).
Oil Filter Hemi:
Mopar MO-899 or equivalent.