The most newestest member already has a question. Wrecked my 98 f150 with a 4.6 and E40D. Bought a 97 f250 with a good body,(supposedly) good 4r70w and a bad 5.4 engine. Swapped the 4.6 into the f250 along with wiring harness and PCM. Starts, runs, drives and all is well, except---- it will not shift into 4th gear. As it gets up to 45 mph it actually downshifts to second. With OD turned off it stays in third. I rarely go over 55 so this is not the end of the world but I'd like it to work. The only other issue is a somewhat jumpy 1-2 shift. Is this 4r70w bad from the get go? Seller(city electric dept. ) says it probably never even got up to 4 th just poking around town and suggested pouring in some"transmedic". Or did I mess it up by pairing it with a PCM that was running a E4OD before?? I still have the E4OD out of the wrecked truck
and probably could swap it in in about a day or so, but I am certainly hoping for an easier fix. Any suggestions would be very much appreciated. Thanks, Nick.