So earlier I posted that the speedometer was showing faster then I was actually going about 10 mph faster. So I pulled the gear and found it to be a green one with 21 teeth.. This is for a 59 Fairlane with a Ford O .Started looking for a gear with more teeth finding out it would be easier to look for hens teeth. Any ideas I'm pretty sure I can;t be the first with this issue.As always this forum is a wealth of knowledge.Thanks Dave