rear end leak

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The difference between 3.25 and 3.50 gears would be less than 200 RPMs at 60 mph if the tires were the same size before and after the change.

You can use the spreadsheet here to play around with tire sizes and gear ratios

https://www.7173mustangs.com/thread-tire-sizes--11566?pid=115406#pid115406

And, if you still need to change your speedometer gear to correct your speedometer you can use this spreadsheet

https://www.7173mustangs.com/thread-speedometer-gears?pid=163384#pid163384
Hey Don, I don't have the office program to open the xls spreadsheet. Is there a different way for me to figure out the speedometer gear I need?

 
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