Powertrain:
Engine (2.8L Diesel CRD, 3.8L V6), Transmission (Manual & Automatic), Transfer Case, Differentials, Driveline
Chassis:
Suspension (Front & Rear), Steering, Brakes (Front & Rear), Wheels, Tires
Body And Interior:
Frame, Bumpers, Body Panels, Doors, Hood, Soft Top/Hard Top Systems, Interior Trim, Seating, HVAC, Electrical System
Electrical And Emissions:
Ignition System, Fuel System, Exhaust System, Cooling System, Emissions Control Systems, Lighting, Instrumentation, Audio System, Powertrain Control Module (PCM) Diagnostics
Cooling System:
Radiator, fan, water pump, coolant hoses, thermostat, heater core, temperature sensors.
Fuel System:
Fuel tank, fuel pump, fuel filter, fuel lines, fuel injectors, pressure regulator.
Clutch System:
Clutch disc, pressure plate, release bearing, clutch master cylinder, clutch slave cylinder, clutch hydraulic lines (for manual transmissions).
Exhaust System:
Exhaust manifolds, catalytic converters, mufflers, tailpipes, exhaust hangers, O2 sensors.
Frame And Bumpers:
Body-on-frame construction details, frame inspection and repair, bumper removal/installation, mounting points.
Heating And Air Conditioning:
AC compressor, condenser, evaporator, receiver/drier, refrigerant lines, blower motor, HVAC control module, heater core, climate controls.
Emissions Control:
EVAP system, EGR system (if applicable), PCV system, emission control sensors (O2, MAF, etc.), onboard diagnostics (OBD-II).
Maintenance:
Lubrication, Fluid Changes (Oil, Coolant, Brake Fluid, Transmission Fluid, Differential Fluid), Filter Replacements, Belt Inspections, Spark Plug Replacement, Tire Rotation
Diagnostics:
Troubleshooting flowcharts, DTC (Diagnostic Trouble Code) interpretation, component testing, electrical circuit diagnosis
Repair And Rebuild:
Engine overhaul, transmission disassembly/assembly, brake caliper/rotor replacement, suspension component replacement, steering system repair, clutch service, body panel repair, HVAC component replacement
Installation:
Component installation and replacement procedures for all covered systems
Vehicle Quick Reference:
General vehicle information, fluid capacities, jacking points, tire pressures, basic maintenance checks.
Body Repair:
Panel replacement, dent repair, frame straightening, door and latch adjustment, soft/hard top repair and adjustment.
Axle Service:
Front and rear axle disassembly, bearing replacement, seal replacement, gear pattern adjustment, differential lock service (if equipped).
Depth Of Coverage:
Comprehensive: Covers basic maintenance to full vehicle rebuilds. Includes detailed torque specifications, assembly sequences, diagnostic procedures, and wiring diagrams.
Engine Code:
VM Motori R 428 DOHC (2.8L CRD)
Displacement 2 8L:
2.8 liters (2776 cc)
Configuration 2 8L:
Inline 4-cylinder, Turbocharged Diesel
Horsepower 2 8L:
Approx. 177 hp @ 3800 rpm (varies slightly by market/year)
Torque 2 8L:
Approx. 305-310 lb-ft @ 1800-2000 rpm (varies slightly by market/year)
Fuel System 2 8L:
Common Rail Direct Injection (CRDI) with Turbocharger
Engine Code:
Chrysler ERB (3.8L V6)
Displacement 3 8L:
3.8 liters (3778 cc)
Configuration 3 8L:
V6, SOHC (Single Overhead Cam), 12 Valves
Horsepower 3 8L:
Approx. 202 hp @ 5200 rpm
Torque 3 8L:
Approx. 237 lb-ft @ 4000 rpm
Fuel System 3 8L:
Sequential Multi-Port Fuel Injection (MPFI)
Service Intervals Oil Change
Oil Change Interval 3 8L:
Every 3,000-5,000 miles or 6 months (depending on driving conditions and oil type). Consult manual for specific API service category. Synthetic recommended.
Oil Change Interval 2 8L:
Refer to manual for diesel-specific intervals, typically around 5,000-7,500 miles or 12 months. Use CJ-4 or CK-4 specification oil.
Engine Oil 3 8L:
SAE 5W-20, API SN or equivalent.
Engine Oil 2 8L:
SAE 5W-30 or 5W-40 Diesel Engine Oil (API CJ-4 or CK-4 spec).
Coolant:
Mopar OAT (Organic Additive Technology) or equivalent HOAT (Hybrid Organic Additive Technology) antifreeze/coolant, typically purple or orange.
Brake Fluid:
DOT 3 or DOT 4 Brake Fluid.
Transmission Fluid Auto:
Mopar ATF+4 or equivalent.
Transfer Case Fluid:
Mopar NV241 Transfer Case Lubricant or equivalent.
Differential Fluid Front Rear:
GL-5 Gear Oil (e.g., 75W-90 or 75W-140 depending on axle type and temperature). Limited-slip additive may be required for certain differentials.
3 8L Engine Common Concerns:
Oil filter housing leaks, minor oil consumption in some units, exhaust manifold cracks (less common than on earlier models but possible).
2 8L Diesel Common Concerns:
DPF (Diesel Particulate Filter) issues (if applicable by market/emissions spec), glow plug reliability, turbocharger maintenance.
Common Wrangler Jk Issues:
Wiper motor failures, HVAC blower motor resistor issues, leaks (soft top/hard top sealing), ball joint wear (especially with larger tires/off-road use).
