Speedometer gears help
Thread Starter
Pro
Joined: May 2008
Posts: 582
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Speedometer gears help
I have a Richmond Gear Super T-10 installed in a 1979 corvette. I am trying to get the speedometer to read correctly. The transmission drive gear is a 8 tooth blue gear and by doing the math of a 8 tooth drive gear, 27 in tall tire (255-60-15) and a 3.55 gear I need a 21 tooth red driven gear. At 60 mph on the speedometer my GPS and also my phone say I am doing 55 mph. I changed the driven gear to a 22 tooth gray gear and now with the speedometer reading 60 mph my gps and phone say I am doing 64 mph. So I guess I need to change the drive gear but have no idea of how to get this set correctly.
Race Director
Joined: May 2006
Posts: 18,729
Likes: 2,579
You cannt change the drive gear without transmission disassembly. They show the 21 tooth gear at this site.
http://www.thegearbox.org/catalog/it...30/3553411.htm
http://www.thegearbox.org/catalog/it...30/3553411.htm
Intermediate
Joined: Mar 2002
Posts: 34
Likes: 0
From: Jacksonville Fl
