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42/12 ratio. Are these 3.42's or 3.50's?

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42/12 ratio. Are these 3.42's or 3.50's?

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08-18-2003 | 07:26 PM

#1

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42/12 ratio. Are these 3.42's or 3.50's?

I am planning to buy some gears and a posi out of a '00 TA. There is a 42/12 stamped on the gears. That comes out to a 3.50 ratio. Is this a gm factory gearset?

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08-19-2003 | 12:53 AM

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Re: 42/12 ratio. Are these 3.42's or 3.50's?

Only thing close to that which would be a stock gear would be 3.42s which I believe is 41/12

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08-19-2003 | 02:02 AM

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Re: 42/12 ratio. Are these 3.42's or 3.50's?

ignore the stampings, and just count the gears.

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08-26-2003 | 12:59 PM

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Re: 42/12 ratio. Are these 3.42's or 3.50's?

42/12 = 3.5

The method is (ring tooth count / pinion tooth count)

You have 3.50's, unless you counted the teeth wrong...

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12, 342, 42, 4212, count, gm, ls1tech, ratio, teeth

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