Trans is in a 01 WS6. Its been segment swapped and ive had the tune gone through multiple times to double check tables and values and everything seems to be in order. Car short shifts into OD very quickly when the car is first started and driven. Seems like after about 15 mins of driving its fine and you can roll into it and itll do what its supposed to. As far as from a dig it almost seemed like it i let the car shift into third itd short shift but if i only went through second it would be okay. Not all the time. This problem is very sporadic and is driving me nuts. I have gotten a code for the TPS but its very very rare. Car has a big cam in it especially for a stock cube engine and stock heads. If anyone has a idea of what to look at or where to start itd be apperciated!

 

Replace the TPS. The computer uses the TPS to adjust shift timing, and shift feel. If, or when, the TPS reports a false signal, the trans IS going to act weird. Replace TPS now, and then see if the problem is solved.