Ever since my tune and taking out the TM, my car does something strange.

As i'm accelerating, right before it shifts from 2nd to 3rd....the car jumps up in revs. Literally right before it shifts. And depending on how much throttle I use the amount of rpms that it jumps, changes. For example, when i'm just cruising along it jumps up 200-300rpm suddenly, right before it shifts. If i'm using more throttle it'll jump up 600-800 rpm.

"Any ideas?

 

i think its the tune. mine does the same i think. for example if i put it to the floor and dont let off it goes in the rev limiter and wont shift, but if i let off the throttle a bit it will shift. mine started doing this right when i got my tranny rebuilt and put it back in. i just kinda got use to it and im running it like that. im planning on going to a th350 or 400 soon