hey guys and girls uh i just got a tranny replaced in my 525 with is an e34 and was wondering what would cause my spedo to jump from 10mph to 40 and back down to 10 while im driving i was told that theres some type of sensor on the transmition that may have to be replaced but im not sure i just want to know the possibilities of what may be wrong my mechanic may have not pluged in the sensor too so i think that may be problem #1 but my RPM's are fine they rev to what their supose to be at thanks alot guys
