1986 Std cab, The speed part of my speedometer seems ok, but the trip odometer never goes over 19 miles. After 19, it goes to 10, then back up to 19. I had the instrument panel out to replace some bulbs, but the regular odometer works as does the speed part. Any one seen this ?? It does make a clicking sound at 19 sometimes, and if I reset it, the zeros don't always line up.