tranny fluid temp cold cool warm hot

[crownvicjim]

at what temperature does a transmission run the best. engines run best in a certain temp range. does the same hold true for a tranny? does it matter as long as there is no breakdown of the tranny fluid?

 

[Rich88LSC]

Most fluid is designed to operate around 175 degrees Fahrenheit. Above that fluid life is drastically reduced. A cooler is always a good idea even on a stock leisurely driven car.