I have a sticky on rolling back odometers on a 70-72 Speedo. I reset the odometer back to zero on the beater when I converted the beater to a 4 speed. I replaced the speedo to 4 speed one so the mileage was incorrect anyway. The car now shows a little over 4k miles on it. http://www.v8buick.com/index.php?threads/odometer-help.176339/