The method 3, further including determining the retarding gear in response to determining that {HEAD ~ the difference} is less than {TAIL ~ a coolant temperature difference} threshold 
is less than
The method 3 , further including determining the retarding gear in response to determining that { HEAD ~ the difference } is less than { TAIL ~ a coolant temperature difference } threshold
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH