So I was walking out of my local wrecking yard, when I saw a truck with a nice aftermarket trans cooler just sitting there (front grill removed, easy access).. So I pulled it off to add to my kia.. Then I thought maybe it's too large ?? Could that cause issues with the trans as well ?? Also,on the truck it was mounted in front of the AC condenser. While this is an easy place to put it, would it not effect the AC performance ??ThanksJosh

Josh, on my 07 GMC Sierra the trans cooler is mounted in front of the A/C cooler which is in front of the radiator. I think most vehicles are that way. As to the oversize, I have an oversize one on my truck. Do i need it in the cooler weather, NO. Do I need it in the summer when towing up long upgrade and backing down on long downgrades, Yes. Maybe you need one maybe you don't. You need to research it more. How is your TV doing now?

It's possible but doubtful. The only time it would be too big is iff you were unloaded and the trans temp never got up to 140 degrees. In that case the fluid wouldn't burn off moisture and may get contaminated.

Many newer vehicles won't let the torque converter go into lockup until a minimum temperature is reached. Probably not an issue in SC.

I have always thought it should be installed before the radiator so that if the fluid is cooled too much it will be warmed to the proper temperature before going back to the transmission. Others disagree.What do you all think?

wgriswold, That was always my thought and at one time it may have been accepted practice. Nowadays it's vehicle radiator first and auxiliary cooler second. Auto manufacturers seem to be more concerned about overheating than running too cool. I think, and maybe someone can confirm, that modern automatic transmissions now have temperature sensing that recirculates the fluid until it gets warm before allowing it to go to the cooler.

Can you have too large of a trans cooler ?? | Good Sam Community

23 Replies

mbopp
Explorer
Jan 02, 2015
Many newer vehicles won't let the torque converter go into lockup until a minimum temperature is reached. Probably not an issue in SC.
ScottG
Nomad
Jan 02, 2015
It's possible but doubtful. The only time it would be too big is iff you were unloaded and the trans temp never got up to 140 degrees. In that case the fluid wouldn't burn off moisture and may get contaminated.
Marauderer
Explorer
Jan 02, 2015
Josh, on my 07 GMC Sierra the trans cooler is mounted in front of the A/C cooler which is in front of the radiator. I think most vehicles are that way. As to the oversize, I have an oversize one on my truck. Do i need it in the cooler weather, NO. Do I need it in the summer when towing up long upgrade and backing down on long downgrades, Yes. Maybe you need one maybe you don't. You need to research it more. How is your TV doing now?

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Can you have too large of a trans cooler ??

23 Replies

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