Poros separuh kenderaan juga dipanggilaci pemacu, which connects the differential with the drive wheels. The aci pemacu is the shaft that transmits torque between the gearbox reducer and the drive wheels. There is a universal joint (U/JOINT) at the inner and outer ends of the shaft, which is connected to the reducer gear and the inner ring of the hub bearing through the spline on the universal joint.
Theaci pemacumenghantar kuasa dari pembezaan ke roda pemacu kiri dan kanan.