A vehicle has an engine, an accelerator for controlling {HEAD ~ the rotary speed} of the engine, {TAIL ~ an axle} and a multi speed transmission for transmitting power from the engine to the axle 
A vehicle has an engine , an accelerator for controlling { HEAD ~ the rotary speed } of the engine , { TAIL ~ an axle } and a multi speed transmission for transmitting power from the engine to the axle
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH