I just don't understand why A TPS would cause it not to shift?

The PCM needs to see certain values from many sensors in order for the transmission/engine to function properly. If the PCM seen a 100% throttle all the time, A. It would dump more fuel all the time, and B. It would change your shift patterns. And that'* just the tip of the ice berg. I could go on a lot longer on how each sensor has an effect on performance and even just the engine running. Did you know even a misfire condition will keep the cruise control from working?

if it is a cable, kinda doubt but cable issues can cause weird shifting

I still doubt he has the old style kick down cable. More than likely, he has the standard issue 4T60-E trans. And the shift lever sensor is mounted on the top of the trans at the end of the cable. If it were a sensor issue, he should get a CEL.

What about the shake I get like a tire is spinning during heavy acceleration from a stop?

Let'* work on one issue at a time please.

Seriously? Wow ok I was just looking for a few more ideas to toss off the guys I work with. You had a few ideas but after that you are not sure so I asked of this other issue if anyone may have an idea for that as well

See if car has internal problem I am just gonna sell it without putting more into it

Did you change the trans oil and filter? Did you test the TPS like Colin suggested in post #17?

Neither I will see if I have time tomorrow to do both