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Discussion Starter · #1 ·
I have a 68 Impala SS, 307 Powerglide. The previous owner put 3:73 gears in and i dont know how to figure which gear to put in the trans for accurate MPH readings. Can anyone help?
 

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Discussion Starter · #3 ·
Thank you very much. I knew there should be a formula and this website had it. Now i can try to get a more accurate reading.
 

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8th Gen Antagonist
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I had to recalculate too when I went from 2.41's to 3.08's, I had no idea what my tooth count was, so I had to go off the colors, I knew I had a pink drive and a brown driven. All I needed was to switch to a gray driven gear.
 
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