I would have my throttle position valve hang up every once and a while. More annoying than anything. It would basically have the trans thinking that you were at wide open throttle and not shift until the tailshaft governor pressure came up. It started happening more often ...so I put in a bottle of Auto-Rx and it hasn't happened since. I've got another week or two before exchanging it.
Auto-Rx basically has made my transmission shift like it is brand new, did the tranny calculator thing from BITOG, I have gone through 28 quarts of transmission fluid, each time that I have changed the fluid it has come out lighter each time, my thinking is that even with a T-Tec flush there will always be some Auto-Rx in there as it is always cleaning, this is better than no cleaning or having the crud stuck on vital transmission parts. I would be interested to here how the transmission is once you exchange the fluid, and let us know how dark the fluid was when you changed it out.