Description
Ford Speedometer Ratio Adapter
It’s best to call in with GPS readings at 40,50, and 60 versus the speedometer reading to be sure the proper percentage is correct before ordering.
# 55RA. Ford speedometer ratio adapter. Must be used with screw on cable top and bottom. Comes in minus 15%, minus 28% or plus 44%. These units are specific to Ford mechanical cable transmissions and transfer cases and do not go behind the speedometer head.
