Quote:
Originally Posted by springerpete
I have to replace ring gear in my roadster. Presently it is stock which I think is 3.78. If I put in a 3.54 gear & pinion, how will this change the mph and odometer reading ? Thanks, Bill
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There is roughly 6% difference between those two ratios, so your speedometer/odometer will be off by about 6%.
With the 3.54 gears, your speedo will read about 6% too low.
When your speedo says '50', you would be doing about '53'.