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Old 02-09-2006, 02:17 PM
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GM 7.5 gear question

I have a set of 3.23 gears for a 7.5 GM rearend. The ring has 42 teeth, and the pinion has 13, and of course 42 divided by 13 is 3.23. I also have a ring with 40 teeth on it, but no pinion. It's suppose to be a 3.08 ring. If thats the case, it has to have a pinion with 13 teeth. 40 divided by 13 is 3.076. Is that a 3.08? Will the pinion gear for the 3.23 interchange, and work with the 3.08 gear?

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Old 02-09-2006, 04:26 PM
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No, they won't interchange. The pitch on the teeth is different so the ring gear has to match.
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