Hello,
I know this is more of a mechanical question then a tuning question, but maybe some can point me in the right direction. My 99 Z/28 with auto trans wont shift out of 1st gear unless you lift off the gas then reapply throttle, it seems to go through the other gears just fine on its own. I went under bi directional and the solonoids respond to the commands and shift to the correct gear as commanded. I did a long wholeshot and that is when it started acting up. The trans is stock and shifting is set to stock parameters . The car is supercharged w/ meth injection and the car only has 47k mi. and only 5k with the supercharger. Any help would be greatly appreciated as I have zero experience with auto transmissions.

Thank you,
Greg