Ok so as life would have it this is the same third member I have under the coupe, who would of thought that I got lucky, but need to replace the pinion seal its starting to leak. Thinking that while its out put a traction lok in it. Need to look for new K-frame mods to see what it will take to put in a 700 4r, any particular year 700 r I should look for, and what is the differance from a 4L80, I know the E is electronic....