Trans Temperature gauge

[MBRZ71]

I'm already making plans to install the cooler upgrade. B&M 70272.

Seems worthwhile especially in the climate my truck will be in mostly. I'm pretty sure my current cooler is stock.

 

[Supercharged111]

Stock does good if you're not towing. Even then, if you can keep the TCC locked you may not need a cooler. But I also know how insanely hot and hilly the desert is over by AZ/CA.

 

[DSinOR]

-38 sounds like an open circuit for the trans sensor, hopefully its wiring external to the trans because you need to crack it open to change it. But that would explain odd shifting behavior if your pCM thinks the trans is -38 degrees

Thanks AGirl.
Started new thread: https://www.gmt400.com/threads/96-yukon-4wd-4l60e-issues-at-275k.66576/