blackedoutZ

i have a 99 z it has a little head work a mother thumper comp cam and a 3200 stall and a predator tune. it was shiftin fine one day the next it it was not. In normal driving it doesnt leave first till 5k rpm and at a clamp you kick it and it drops to 1st it just goes to the revlimiter like it isnt pullin at all. i had a another ls1 and trans so i swapped the trans it still does it. i have changed all the sensors and it still does it could i have a bad ecm or what all help is greatly appreciated.

performabuilt

iTrader: (25)

I would still say you have either a tuning or sensor issue . You need to get with a tuner and let them look at the data and see whats happening