nm9stheham
Well-Known Member
No, you don't want to do this..... mount a tubular finned trans fluid cooler tucked up under the car on the frame connectors, out of the airstream and a few inches from the exhaust. My son's car came this way and the trans temps registered 220-230 F on the interstate at 70 MPH in OD.....not good at all.
We pulled this cooler out, and put a simple Hayden Rapid-Cool type up in front of the rad and AC heat exchanger, plumbed after the radiator cooling loop, and now the ATF temps are around 175 F under the same conditions (as instrumented).
Note that the temp sensor was (and still is) after the cooler(s) so is not all that indicative of the internal trans fluid temps. But the actual trans fluid can't be cooler than after the cooler, which means the internal trans fluid temps previously measured were HIGHER than 220-230F. We'll eventually move the trans temp sensor to the pan to see the internal fluid temps for real with the new setup.
We pulled this cooler out, and put a simple Hayden Rapid-Cool type up in front of the rad and AC heat exchanger, plumbed after the radiator cooling loop, and now the ATF temps are around 175 F under the same conditions (as instrumented).
Note that the temp sensor was (and still is) after the cooler(s) so is not all that indicative of the internal trans fluid temps. But the actual trans fluid can't be cooler than after the cooler, which means the internal trans fluid temps previously measured were HIGHER than 220-230F. We'll eventually move the trans temp sensor to the pan to see the internal fluid temps for real with the new setup.