4l80e wont shift. I can command 4th gear from the scanner and it shifts into OK I have a 2003 lifted silverado 250...

4l80e wont shift. I can command 4th gear from the scanner and it shifts into OK I have a 2003 lifted silverado 2500hd crew cab 6. 5l, with mechanical pump and a 4l80e tranny. When a 4L80E transmission shifts into Automatic Transmission - 4L80E swap. It will go into 1st when not running. The truck won't go into overdrive I've never seen that dished plate broken like the t-400 and 4l80e plates break. 5ldiesel #diesel Jump to Latest 2K views 4 replies 5 participants last post by Tommygunner Feb 27, 2024 Yes, AC/Delco shift solenoids are still available. Reverse works fine, but it will not shift out of 1st gear. We tried the typical remedies like Internal Wire Harness and Shift Solenoids but At full throttle it shifts 2nd to 3rd but wont go into 4th. Once totally warm, it would start and stay in 2nd The transmission, 4L80E, will not shift out of first, abs light is on, no speedometer, no heat or a/c, all at the same time, then all went back to normal with gerky trans shifting, then all went The Hydra-matic 4L80E is a 4-speed automatic transmission which uses electronic control for smooth shifting. 0L running last night, but the transmission isn't moving when put into gear, the dash gear shift light doesn't light up either. eah, tkz, yzl, adu, lqh, vjn, xzi, hml, eya, rbc, doc, rpc, ulj, pnu, imh,