• 25 Clutch4
• 26 Manual transmission73
• 27 Automatic transmission1
• 28 Transfer case1
• 31 Frame, trailer operation6
• 32 Suspension7
• 33 Front axle28
• 35 Rear axle54
• 40 Wheels, chassis alignment check2
• 41 Propeller shaft11
• 42 Brakes - hydraulic and mechanical systems22
• 43 Brakes - pneumatic system and auxiliary brakes1
• 46 Steering58
• 54 Electrical system, equipment and instruments40
• 55 Auxiliary drive systems, hydraulic and linkage systems3