I notice that one of the vehicles in your sig is listed as out of service due to a blown tranny. Does that have anything to do with downshifting during hill descents?
Originally Posted By: Colt45ws
I notice the exact same behavior measuring Transmission Fluid temperature through my SGII. The trans temp sensor is in the pan, bathed in fluid. Flat highway: 140-160 dependent on ambient Charging up a mountain: 180-200.(Seen 210 once) Going down the other side: Drops quick to 190 then slowly to 180. Once it passes 180 though it will never cool below that point unless shut off and allowed to cool.
Originally Posted By: MolaKule
Are you observing the coolant temperature or actually measuring the ATF fluid temp? With my OBDII instrument I can measure ATF fluid temps but my gauges only show coolant temps.
Originally Posted By: tqh
I notice that the ATF temp goes up to ~200F when I get to the top (usually 140-150F on flat highways), it drops a little bit when I go downhill _regardless_ of whether I use the brakes or engine braking.