Options:8-speed constant mesh, 16-speed two-speed power shift, 12-speed synchronized, 16-speed four-speed power shift
12-speed synchronized:SynchroShift, 12 forward and reverse gears, dry disc clutch, standard on 5640 SL, Dual Power optional for 24-speed
8-speed constant mesh:EconoShift, 8 forward and 2 reverse gears, dry disc clutch, oil capacity 69.6 qts (65.9 L), used on 5640S
16-speed two-speed power shift:Dual Power, 16 forward and 4 reverse gears, dry disc clutch, oil capacity 69.6 qts (65.9 L), optional on 5640S
16-speed four-speed power shift:ElectroShift/Pulse Command, 16 forward and reverse gears, wet disc clutch, oil capacity 64 qts (60.6 L), standard on 5640 SLE