speedo gear question

bill302

Active Member
Nov 2, 2005
2,131
1
46
alabama,gadsden
i just got my 3.73's in and need to know what speedo gear to get, i already ordered a 23 tooth, but i got to looking at the ad and it lists the same one to work with 3.73's and 4.10's. anyone know for sure how many teeth i need?
 
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well, there is a 5.05% difference. so with stock hight tires, you will be going 5% slower than your speedometer reads. 70 mph times 1.0507=73.55 mph. so there you go. a slightly taller tire will even that little bit out anyways.