I have a 1940 champion with 4:10 Gears. I Pulled tranny to do a clutch Job, while I was at it the Speedo Reads low MPH by 25 MPH ay 45 (GPS Speed), so while disconnected I spin the Speedo and it works fine over it full range It has a 16 tooth Drive Gear in Tranny. I am wondering if anyone know the correct number for a 4:10 Diff?
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