Originally Posted by stopper
He stated in his post that it was a 4r70w and there were no flashing lights or codes.
I would say that TPS sensor is out of whack or the downshift cable is out of whack. I don't think you need a rebuild.
Uh, notice the timestamps on the posts and the edit....
No downshift cable....
The TR and TPS sensors are possibilities. You can either load up the shotgun and start shooting and see if you get lucky, or you can follw a logical diagnostic process and increase the odds that you'l get it right much sooner.
Start by running the PCM Quick Test including the KOER portion of the test. This test provides a baseline, even if no faults are noted, of what is working and what may not be working. Instructions maight be around here somewhere, otherwise they're at www.fordfuelinjection.com
Only piece of test equipment needed is a paper clip, pencil, and paper and an operational CEL.
Once that is completed, a transmission drive cycle test should be performed. Don't have it on this computer, will post it if needed when I gat a chance to get on the computer on which I have it stored.