What rear end in 77 firebird?
06-09-2008, 05:09 PM
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Most of those cars were 2.56's 2.73's or 3.23's mainly dependant on what engine was in the car. larger engines usually had taller gears cause of their torque advantage.
Best way to figure it out is spin the axle and count how many times the pinion yoke spins per axle revolution.
Best way to figure it out is spin the axle and count how many times the pinion yoke spins per axle revolution.
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06-09-2008, 05:21 PM
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Not sure how those cars are, if there's an RPO sheet or sticker, but get a pic of it and post it. Or go here and see how many turn up results
http://www.crankshaftcoalition.com/w...rs_build_codes (Small list)
http://www.crankshaftcoalition.com/w...e_GM_RPO_codes (Much larger list, I bookmarked it)
http://www.crankshaftcoalition.com/w...rs_build_codes (Small list)
http://www.crankshaftcoalition.com/w...e_GM_RPO_codes (Much larger list, I bookmarked it)
06-09-2008, 09:06 PM
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If you have the rear pulled, you can count the pinion and ring gear teeth after pulling the cover, and set it as a fraction of Pinion/Ring and reduce. There is your ratio.
