Join Date: Aug 2008
Location: Tampa Bay, Fl.
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Auto trans radiator cooler bypass
Just a word here to you folks doing the transmission radiator cooler bypass. DON'T! Water cools about 32x's better and faster than air. The transmission fluid coming from the torque converter to the radiator is at a much higher temperature than the coolant in the radiator. Once the transmission fluid gets to the radiator, it is quickly cooled down to the cooling system temperature. Then it goes to the auxilliary cooler where it gets cooled below cooling system temperature. If you tow, haul or off road, put a second auxiliiary cooler in series with what you have now, or just get a bigger auxilliary trans cooler. It can't be too big, or your return flow rate will drop. If your concerned about cross contamination, get a good aftermarket radiator and rest easy. HEAT is an automatic transmissions worst enemy.