Hcomputers

I have a 1994 4l60e in my silverado and it has been freshly rebuilt because of this issue it was slipping in forward gears but reverse was fine no slipping after the rebuild it has the same problem the only thing that was not rebuilt was the pump could this be the problem with my transmission I need some help the parts in the transmission looked fine still had the numbers readable on the the bands in all of the clutch packs I cant figure this out please Help somebody?

mrvedit

Very low pump pressure could cause slipping. The driver side of the trans has a pressure port covered with a plug. Either buy a trans pressure gauge on ebay for $45 or go to a trans shop and have them measure the pressure for you. Stock is around 60psi in Park/Drive, and 100+psi in Reverse, all at idle. Trans with a Shift kit or Boost valve will be 50% to 100% higher.