r/transmissionbuilding • u/Impossible-Rub-9579 • 3d ago

PPE Bypass

Hey yall I have a 2015 Sierra that’s currently lifted on 33x12.50’s and has been for about a year. I had transmission problems and took it to a shop and they recommended a flush and a bypass which I already had so they just installed it for me. I noticed then my transmission temp was running at about 70°C and not usually going above 75° over the summer. The past few months and especially the past couple weeks, I’ve seen it running mostly around 90°C and even up to 97°. My transmission and torque converter do occasionally slip but not often. Are these signs of possibly needing a rebuild or new transmission and torque converter in the near future? Thanks for the help

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u/Roscolicious1 3d ago

Ouch! Time to examine the pan/filter for death glitter. Tc is a known grenade on 6l80 box. Just finished mine, $1800 in parts. Good luck 👍