We have a 96 F250 with a 351 and E4OD that I have been demanding a lot from lately. The transmission had a stock rebuild about 10 years ago and I believe it is giving me signs that it might have to be done again. The last time I was inside an E4OD it was behind my PowerStroke. I ended up turning it over to a professional builder who over built it. Not a bad thing by the way. This truck is a daily driver so I want it to behave as such. However, I want it to be able to take on the heavier loads and bigger hills it is dealing with now. Any input on this?