201fireman Posted February 18, 2018 Share Posted February 18, 2018 I am installing a cooler to add to the current stock cooler. I have looked all over online and even on here and it seems almost split on which line is the out and which line is the return line on a TH350 trans. Even TCi and B&M are opposite. TCI says bottom out of trans to bottom into radiator, and top of radiator is the return to the trans and B&M says the top of trans is the output to top of radiator and bottom of radiator is return to trans. If anyone knows for sure please post... Also, I am adding a trans temp gauge with an Autometer manifold in line to read the temp. Where do I read the trans temp? Do I install the gauge manifold on the hot side or on the return line after the fluid is cooled to measure fluid temp? Quote Link to comment Share on other sites More sharing options...
monte70car Posted February 18, 2018 Share Posted February 18, 2018 I have my trans temp sensor in the tans pan, my 70 runs 190° in this location but I do have an external cooler along wit the stock cooler. I want to say my top line is connected to the external cooler and then it goes back to the metal line to the trans. Quote Link to comment Share on other sites More sharing options...
201fireman Posted February 19, 2018 Author Share Posted February 19, 2018 Gotcha. Thank you. It seems like it is almost a 50/50 split when I read things online or look at instructions on which on is the feed and which one is the return. I am almost wondering if it doesn't matter. Quote Link to comment Share on other sites More sharing options...
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