Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - Hard to find 41 & 15 tooth speedo gears 700r4
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Old 09-11-2012, 09:49 PM
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GM #8642620 15 tooth drive gear - grey
GM #1362195 41 tooth driven gear - yellow

According to the charts, you have:
4.10:1 diff ratio
30" tires

And yes, that 41 tooth gear seems very hard to find!

Ooops! Just noticed that SSedan64 came up with the same info.

Last edited by 66GMC; 09-11-2012 at 09:54 PM.
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