svttech76 said:HMM I thought they were pretty much the same.. I wonder what would have to be changed? If somebody has done this swap I hope they post to this.
I know that the output shaft on the 4R75W has to be changed to work in a 4R70W car. I believe a lot of the internal parts are the same except for the VB, but I honestly don't recall. I say the 75 is little more stout because the numbers behind the R are a torque rating. 75 is greater than 70.