Reaching out into the HPTuners universe for help and guidance regarding some electronic trans nonsense.
Quick Rundown:
2008 Colorado - Full Tube Chassis - Custom Everything - Big Tires - Big Axles - Rock Crawler
Gen7 BBC - 8.1L Vortec Motor - Holley Terminator engine management - Runs great
2008 Escalade - 6L80 Transmission - TCM2650 Transmission Controller - Not So Great currently.
I bought the transmission a few years ago knowing that it had been pulled out because it lost reverse. This past May I finally got around to rebuilding it. All new steels and clutches, rubber pistons and seals throughout, filter, fluid, etc... Throw the trans in and hook up the TCM2650 to it. Start it up and drop it into drive, No movement. Drop the pan and discover that I had left the plastic shift lever off the external lever and it wasn't getting pushed into the valve body so it wasn't demanding any gear. Fix that, and now I can watch it demand each gear as appropriate, but still no movement. My only error code is a P0776 Error - Pressure Control Solenoid B Performance/Stuck Off (permanent.)
Using HPTuners I can see the transmission input speed matching rpm and it's showing 0 output speed and 100% transmission slip. Obviously it has no rear tire movement regardless of throttle input. Before I throw money at a new TCM/valve body, can anybody give me a different idea of what to look for/try for a repair?
Searched the forums and only three threads showed up with a similar code, the two regarding 6l80s both still had tire movement and it was driveable, only in certain gears.
Anybody have any ideas?