Forum Discussion
4x4ord
Jan 19, 2020Explorer III
I have not paid a lot of attention to my transmission temperature but today at minus 2 degrees F I watched as a cruised down the highway with no load. After about 40 minutes of driving the engine temp got up to 203 degrees before it rapidly dropped to 190 degrees and started slowing climbing again. I think the truck must have a 200 degree thermostat. The transmission just slowly and steadily rose till it reached 190 degrees. My guess is that the engine coolant warms the transmission fluid.
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