Try putting some foam tape on the inside of the wheel where it contacts the plastic cap. The cap itself has been known to slip because of a poor fit between the hub and the wheel. It solved my bobbing speedometer. Bruce Benson > When I bought my car, the spodometer wasn't working. After replacing the > stripped out plastic cap, it kind of worked, but constantly bobbled up and > down, so I never really knew how fast I was going. So now I'm certain that >the lower cable, angle drive, and cap are > all just fine, but still, my spedometer estimates my speed. It will bob > back and forth within about a 20 mph range. Any ideas on how to fix this? > > -Christian