hey i had the gm supercharger placed on my car and reflashed the ecu at a gm dealer and for the past 2 days the cars been hitting the rev limiter in second gear when i mash the gas from a dead stop or a 20mph roll ect.. second gear is the only gear it does this at, i unplugged the computer and plugged it back in and still the same problem. could this be because the cars making alot of power that it overrides the ecu which says it to shift at 6200 instead of going past that? any help here guys? thanks

2000 pontiac sunfire gt 2.4l
61k miles
4 speed automatic

(yes i posted this in performance but i think this might help more.)

Might be something wrong with the transmission, ie low on fluid or starting to go out.. could be a variety of factors, hard to tell just from that description.

Have you considered an Autotrans Interceptor (or B&M shiftplus?) to firm up the tranny shifts?




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yeah i might actually order the auto trans interceptor in a few weeks. ill check the fluid today.