Does this make sense?

[wood4heat]

Originally Posted by TwinTurbo

Have you crawled under and looked at the transmission? I put one in my truck that came out of a friends, that had been rebuilt, it had a tag on it from the company and I was then able to call them and find out what they do in a typical rebuild. Just a thought.

Not closely, I'll give it a good look over the weekend.

Originally Posted by cleatus12r

wood4heat, what is your PCM code? Longshot270 had some really great information there, but as far as the 4R100 is concerned it is a little off....

Under normal acceleration, the TCC is commanded to apply in 3rd gear at some point (Depending on PCM code, which is why I asked for it).

If you can truly FEEL the 1-2 and 2-3 upshifts under normal acceleration, it's likely you have something done to the transmission. Typically, with stock programming and a stock transmission, the 1-2 and 2-3 upshifts SLIDE into gear and you really don't notice much of an RPM change.

I'll look for the PCM code as well. You can definentely feel the 1-2 and 2-3 shifts under normal driving, the next shift slides in as you described.