I would install it in the return line and not the feed line. It doesn't matter how hot it is going to the cooler because you can't do anything about that temp anyway shy of a converter change. Return line at least informs you if your coolers are doing their job.
transmission temp
- Thread starter Texas gn
- Start date
- Joined
- Jun 18, 2001
I want to know the temperature coming out of the transmission. That's the worst case. I can do something about it. If it's too hot coming out of the transmission, I add cooler capacity until it isn't. If I put it in the return, and the return tells me it's 190 degrees, I miss the possibility the internal temperature is actually 230 and the return temp actually needs to be 140.
Best place is in the pan. That gives you the actual fluid temperature that is going back into the transmission pump and the rest of the system, and that is the information you need. Shoot for 150 degrees on average. It will run higher or lower depending on ambient temp and what you are doing with the car, but if you can maintain 150 on cruise and brief city traffic you are good to go. That generally means you have capacity for the hot spots.
Since you don't want to disturb pan, the return line is the next place to install it, although that isn't going to be the best reading. Sometimes that will be cooler than the pan average and other times hotter. Pan temp is what is important.
INEEDAGN is right about output line. No real value in that reading.
Since you don't want to disturb pan, the return line is the next place to install it, although that isn't going to be the best reading. Sometimes that will be cooler than the pan average and other times hotter. Pan temp is what is important.
INEEDAGN is right about output line. No real value in that reading.
