Usha badhkeed waa usha gudbisa wareegga u dhexeeya qalabka yareeya qalabka gearbox-ka iyo giraangiraha wadista (badanaa waagii hore way adagayd, laakiin usha godan way fududahay in la xakameeyo dheelitir la'aanta wareegga. Sidaa darteed, baabuur badan ayaa isticmaala usha godan). Dhammaadkeeda gudaha iyo dibadda waxay leeyihiin kala-goyn guud (U / kala-goyn) siday u kala horreeyaan, kaas oo ku xiran qalabka yareeya iyo giraanta gudaha ee xudunta oo dhex marta spline-ka ku yaal kala-goyska guud.
Usha axle-ka waxaa loo isticmaalaa in lagu wareejiyo awoodda u dhaxaysa kala duwanaanshaha iyo giraangiraha wadista. Usha badh ee axle-ka wadista ee aan jabin waxaa loo qaybin karaa mid buuxa oo sabeynaya, 3/4 oo sabeynaya iyo mid badh-sabaya iyadoo loo eegayo qaababka taageerada ee kala duwan ee dhammaadka dibadda.