IHdieselfan
Registered User
My 93 250 I bought years ago was originally a 5 speed from the factory. A friend of mine had the exact same truck but his was an e4od. He wanted the manual and I wanted the auto. So we parked the side by side and swapped. The only difference in the trucks was mine is 3.55 and his is 4.10. The e4od he said was rebulit by a guy in our area that was real good with the e4od specificly. And I rode with him pulling a gooseneck at about 10,000 lbs total trailer. And it shifted good. Now eversince the swap which has been about 4 years ago. The trans has always slammed in gear. And seemed to hold a gear to long and down shift to soon. I have set the FLPS properly and checked it several times. But it slams in to gear so hard that it makes the dash shake. Could it be programming in the pcm.