05-02-2017, 07:16 PM
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Quote:
Originally Posted by 442w30
So what about non-SS cars like 6, 307, 350?
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All three got 10 Bolt rears*. The 350 SS, the two 396 SS and Z28 got 12 Bolt rears:
As you can see from the chart above the 8.125" Gear = 10 Bolt while the 8.875" Gear = 12 Bolt
Only the Z28 and the L78 396 offered optional hi performance rear end gears from the factory. You will notice that the L78 is missing from the above data. It came standard with a 3.55 12 Bolt Posi (mandatory option) rear with 4.10 gears optional which had Posi mandatory. RPO ZQ9 was the optional 4.10 gears for the Z28 and the L78
1970 would be the last year for the 12 Bolt rear in a Camaro. Beginning in 1971 all Camaros got the new 8.5" geared 10 Bolt Corporate rear.
*Now . . . . with all that said I believe there was a way for you to get a 12 Bolt rear in a 350-2V Camaro which was the only Camaro to offer a "performance" rear. The ratio was 3.31 and it was only available with the TH Auto Trans instead of the standard 2.73. This may . . . . I repeat . . . may be RPO YD1: Special Trailer Towing Axle. Only 132 were sold by Chevy.
Last edited by Lee Stewart; 05-02-2017 at 09:33 PM.
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