Vehicle speed sensor on an A6
Team Owner
Joined: Sep 2005
Posts: 20,352
Likes: 568
From: Ventura County, Calif
Not sure this is what you're after but: 
Manual transmission C6s use a reluctor wheel in the differential to measure speed. Since that counts axle revolutions and not transmission output shaft revolutions, it doesn't need to be recalibrated when you change the final drive ratio.
OTOH, auto tranny C6s measure the transmission output shaft revolutions and do need to be recalibrated when you change the final drive ratio.
OTOH, auto tranny C6s measure the transmission output shaft revolutions and do need to be recalibrated when you change the final drive ratio.
