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Quote:
Originally Posted by GRutter
It depends on wheel diameter. Assuming from your user name that it is a 1929 model.
If you have 21" wheels with a dia of approx 30" your speedometer should show close to 62 mph for a 3.54 rear.
If a 30-31 with 19" wheels, your speedometer would be closer to 60 mph with a 3.54 rear.
If you are reading 58 mph I would believe you have a standard 3.78 rear and not a 3.54. Why do you think you have a 3.54 rear? Did you rebuild and change ring & pinion?
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I installed the 3:54, but, I have 16 inch wheels.