By providing a smaller torque transmitting capacity, blocking of {HEAD ~ the rear wheels} via {TAIL ~ the front wheels} is prevented 
By providing a smaller torque transmitting capacity , blocking of { HEAD ~ the rear wheels } via { TAIL ~ the front wheels } is prevented
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH