A8 trannny won't shift
Thread Starter
Racer
Joined: Jun 2006
Posts: 383
Likes: 1
From: harlan KY
A8 trannny won't shift
So, I had my a&a supercharged 671 rwhp, 616 tq z51 magnetic ride control a8 at the track, and if I launch hard and get better than a 1.8 60 ft time the tranny won't shift into second. I cut 5 1.5 60 ft times and I had the tuner data log the passes. No alipping of tranny. Now if I try to stall it at launch and cut a 1.8 60 it shifts perfectly. The runerveven programmed it to shift at 19 mph and it still wouldn't . Any suggestions?
Thread Starter
Racer
Joined: Jun 2006
Posts: 383
Likes: 1
From: harlan KY
So, I had my a&a supercharged 671 rwhp, 616 tq z51 magnetic ride control a8 at the track, and if I launch hard and get better than a 1.8 60 ft time the tranny won't shift into second. I cut 5 1.5 60 ft times and I had the tuner data log the passes. No alipping of tranny. Now if I try to stall it at launch and cut a 1.8 60 it shifts perfectly. The runerveven programmed it to shift at 19 mph and it still wouldn't . Any suggestions?
Safety Car
Joined: Aug 2012
Posts: 3,960
Likes: 1,106
Odd. Are you getting a solid hookup before the shift? Some GM applications inhibit transmission shifting at full throttle while the tires are spinning to prevent transmission damage but I am not aware of that for the C7.
Thread Starter
Racer
Joined: Jun 2006
Posts: 383
Likes: 1
From: harlan KY
