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Old 07-26-2002, 01:51 AM
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Post Annnnnnd Whhoooom are you?

I asked the rearend in my '77 Trans Am that, but no answer.

How the hell do I find what size rearend it is, its stock from the factory thats about all I know at this point. Its 5:47am and I'm about spent so if you need to know anything else lemme know I'm to brain dead to remember anything else.

HK

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Old 07-26-2002, 05:56 AM
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Are you asking about the gear ratio or the actual size of the gears (like Ford 8" or 9")?
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Old 07-26-2002, 06:26 AM
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Look at the back of the rear-end, up close. To the right of the center, 10-bolt cover. where the brake line attaches to the axle housing, scratch around here, your looking for two letters stamped
on the housing, Pontiac's I.D. to the gears inside. Once you have these two letters, you can cross reference with the year, and might as well decode your car's options. Engine letters are on front of block, left side(pass.side)just below the head, sceatch here for letters. Anyway now
you can, reference a great Pontiac site is
classicpontiac.com. Go into trans-am area,should be able to get ratio, std trans. maybe 3:55
Hope this helps idenify your colprit.Need more help e-mail me T
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Old 07-26-2002, 03:06 PM
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Thanks guys, I appologize for the lack of discriptive info

HK
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Old 07-27-2002, 11:40 PM
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All 1970 to 1981 camaros and firebirds/trans am came with 8.5 rear ends. The WS6 Trans ams came with 3.42 and 3.23 ratios and others came with 2.43, 2.73, 3.08 average. hope this helps.
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