Iowa Chapter Director
Join Date: Jul 2002
Location: Ames, Iowa
Well Wes, IMO the stock AOD is way better than the stock 4R70W that came in mn12's. That's not to say one or the other can't be better with a beefed and built up transmission. Anyway, the 4R70W WILL bolt upto your 5.0. The flex plates should be the same bolt pattern but not positive. I know it IS possible though. BUT it will not simply bolt up and plug in. That is just not how it works. There are three ways of looking at it:
You could use the 5.0 computer but it is not programmed for the electronic 4r70w transmission.
You could use the 3.8 computer which is programmed for the 4r70w transmission but it would NOT work with the 5.0 motor.
get a computer and all engine/transmission wiring from a 1995 Mustang GT. The 95's had a 5.0L engine with an AOD/E transmission which was electronically controlled and somwhat identical to the 4r70w and with a performance chip from one of the know-how guys, ie: Dennis Reinhart, Apten-US, it will run properly.
This engien swap you're attempting is a clash of two different worlds. This is why it's so complicated.
1988 Notch Mustang: - 438W, direct port n2o, t56
2003 SVT Focus: - SCT X3 tuner