4l80e sprag failure. Solve 4L80E transmission troubleshooting issues fast. It is a manual valve body with a brake. The cam lobes in the first clip seem to be the problem. It usually fails under a high rpm, high load 1-2 shift. Nov 20, 2023 · what I’m trying to decide if running the trans low for a couple pulls caused the eventual failure of the intermediates even after fixing the dipstick. I have a 4l80e direct drum with a 34 element hd sprag. Splitting the circuits means separating and analyzing the hydraulic, electrical and mechanical issues that could create the problem. This is NOT a manual valvebody TH400 Mar 7, 2020 · *Was the Forward Clutch burnt down?? Carefully check where the Input Shaft sealing rings ride in the Forward Drum for damage. Are you sure you don't have an electrical issue such as a bad shift solenoid, etc? I've never even heard of a sprag failure at cruise Aug 13, 2018 · The sprag is used for OD, period. Feb 1, 2017 · Herein lies a big difference between the 4L80-E and the 4R100 and a possible reason that the 4L80-E roller clutch fails more often than the 4R100. cfr ysb jbha presdh aqc damm augdcd dktra ylwv ukgzc