So it's stuck in first gear or skipping second gera and going straight to 3rd?
Can you command each gear with the scanner?
You didn't say if this was a NA car or a S/C car.
Grand prix, regals, park ave, bonnevilles all run the same S/C transmission. Grand prix, regals, monte carlo, impala's all run the same NA transmission. Just be aware that some impala's, most it not all bonnevilles and some others run a different gear ratio than grand prix's and regals. Some can be 2.86 and 3.05 where as the regal/grand prix are 3.29.
