Need trans built

Justin B

New member
Aug 2, 2022
Looking for the best shop around to get a 5 speed Allison built. I am located in north Alabama. Mine started flare shifting the 1st to second shift and the 3-4 up and slamming hard cold on the down shift and then started getting the shift range inhibit on start up when I tried shifting in gear. I changed ignition switch and the main harness was leaking fluid between the pins so I changed it and now she’s dead in the water will not take any gear. When you shift in gear you see a small drop in rpms and feel a slight surge like it’s trying to take gear but it don’t. The tcm hasent set any codes since I changed the harness.


don't know sh!t about IFS
Staff member
Oct 21, 2009
Phoenix Az
building the trans wont fix your issue based on what you are saying. you need to find the root of the problem before throwing 5+k at it hoping it fixs it.