My car doesn't want to shift from 3rd to 4th when cold, but shifts fine when war on 2002 Volkswagen GTI

Occurs whenever the engine is cool. Recently had a transmission flush to no avail. Transmission is not throwing any codes. Vag com is saying my rear speed sensor is faulty. I'm unsure if that would cause this issue with the shifting.

Asked by for the 2002 Volkswagen GTI
1 answer
Take it over to Adrian at Milt's Service Garage right in Vallejo. (707)643-7548