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Old 08-01-2009, 10:55 PM
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stock rear end gear ratio 83 firebird

im looking at new gears 4 my rear end and i dont feel like pulling the diff cover to see what series carrier i have. anyone know the stock ratio for an 83 firebird or better yet what series carrier i have?

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Old 08-02-2009, 03:17 AM
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You do not have to pull off the cover to figure out what gear ratio you have. Make a mark on both the tire and the gear yoke. Rotate the tire slowly and count how many times the yoke turns.

This webpage will show you all of the available ratios for that year

http://books.google.com/books?id=ley...age&q=&f=false
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Old 08-02-2009, 02:31 PM
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how do i rotate the tire, with both rear tires off the ground or just one? its a limited slip rear.
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Old 08-02-2009, 03:04 PM
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Both of them, I would almost bet that you have the 3.08 package. How deep of gear are you looking for?
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Old 08-02-2009, 04:01 PM
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thank you.
looking at 4.10s
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Old 08-02-2009, 05:20 PM
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u nailed it i spun it with one tire up and got a lil over 1.5 turns times 2 is 3.08s. so i guess i got a 2 series carrier thank you!!!!
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