M916A1 and M916A2
Front Drive Axle. Provides 6x6 mode, for off-road operation.
Transfer Case. Allows high/low shifting and engages front drive axle.
Hydraulic Winch. Used for lifting semitrailer onto the truck, for coupling.
Tail Roller. Allows winch cable rollover, clear of frame components.
M917A1 and M917A1 w/MCS
Dump Body. Used for transporting and spreading bulk materials.
Change 3 1-7