The trans relearn work great with gm 8 speed but since last year the 6 speed relearn seems not to be working for me. Trans temp all ready i hit the relearn and engine rev up but trans does nothing. Example:hit the relearn engine revs up and trans only goes offline. Neutral in all selections does not go thru clutches. On the 8 speed process takes 15min to complete and works great. It use to do the same with 6 speed but not anymore