Group 1 - Engine
Group 2 - Clutch
Group 3 - Fuel
Group 4 - Exhaust
Group 5 - Cooling
Group 6 - Electrical
Group 7 - Transmission
Group 8 - Transfer Case
Group 9 - Propeller Shaft
Group 10 - Front Axle
Group 11 - Rear Axle
Group 12 - Brakes
Group 13 - Wheels
Group 14 - Steering
Group 15 - Frame
Group 16 - Springs & Shocks
Group 17 - Hood-Fenders
Group 18 - Body
Group 21 - Bumper and Guards