Originally Posted by
Russ K
Is the speedo accurate? I get 31,470 pulses/mile. Also try logging the trans output rpm. To calculate the trans mile per hour, do this; (trans output shaft rpm*60)/trans output revs per mile. The trans output revs per mile is your gear ratio*tire revs per mile.
You need the trans mile per hour to match the vehicle speed. As the trans mile per hour is what the shift speed tables are referenced to.
Looking at a 2006 GTO A4 trans tune, the ISS is 36 and you're at 0.
Russ Kemp