have a 2000 trans am firehawk when launching at track tranny shifts into 2nd before 60 foot car is not spinning. H ave had 4 tuners look at program they all said program looks fine. rossler tranmissions said its not in transmission has to be in programing. this has been going on for 4 years. car car 4200 stall convertor, runs mid 10s with 1,45 60 foot times when it does not jump over into second. 8 out of 10 times it will shift into second all most immediately after leaving ny one else hd this problem

 

How are you shifting it?
Leaving it in D
D3
Manually shifting?

Have you inspected wiring?
Post a copy of the tune file here? Preferably with a log of when it happens