I have a 57 Fairlane with T85 and R11 OD and 4:11 rear gear. I'm running a 22 tooth driven gear but an not sure where I got it, yellow or maybe green and an OD of approx. 0.866. Other gears I have are only approx. 0.767 dia. but too few teeth. Speedo is approx. 15 mph fast at 65mph. According to the parts book correct gear would be B5A 17322 D black 22 tooth. Do you agree and does anyone have one? Thanks. Tom.
I know in a Toploader you would need to change the drive gear in the transmission for that rearend ratio. Don't know about a T85.
Try www.LaSpeedometerGear.com . Kerry Conklin (318) 208-4184 kerry@americanhotrodsolutions.com
Thanks. I'll check with him.
Speedo"s were checked at 60MPH.
Using the standard supplied 7:50 X 14 tire , a 23 tooth gear would be required.
That would be part# B7A 17322-L
Impossible to find. A date with Jennifer Aniston would be easier to accomplish.
Last one I saw went for $110.00 on eBay.
Oldmics
speedometer gear reducer...usually requires making new speedometer cables.