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