After blowing out my trany a few weeks ago I have been trying to locate another. I found plenty the problem I found was making sure they fit. I have 97 4.6 4r70w 4x4, and I found many transmissions for it. Problem id the service code on the transmission case shows multiple different numbers. Mine says f65 while the junkyards are 75 and 85. The 85 is another 97 just like mine, my question is are the interchangeable which ones are and arent. I could use some help my dealerships just said I got no clue. Please help I want a tranny by today