We have a 99 trans am, LS1 auto trans, we just put 411 gears in it so I have to change tune for that. Also the previous owner did a tune and all I can se he did was removed the rev limiter and told it to shift at 7800. It shifts ok at part throttle until we changed gears now it shifts all over the place. Plans this winter is cam and long tube headers. When we put the gears in we also did the midmount cross member and torque arm. P.S. the guy had this thing shifting or trying to shift at 7800 with stock yellow springs glad we saved bought it and saved it from dropping a valve. He had time tickets from the drags with 12.60's not sure if they were his or not we took out 2.73 gears stock
Is there somewhere to go to the internet that has tunes that I can drop in with minimal changes we are new at this ?