speedometer quit working. does this effect the transmission? on 1995 Ford Contour

car jerks when going up and down hills during exceleration and also when coming down hills.

by in Wellsburg, WV on July 17, 2013
1 answer
ANSWER by on July 17, 2013
if speed sensor is bad, it tells computer what speed your going and when to shift transmission. may not set engine light but should show code for speed sensor fault.