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Old 02-25-2003, 11:56 PM
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Post 10 bolt chevy id

ok thanks for all the info on my differential i appreciate it umm where can i get axle housing mounts for my 67 camaro? and also can anybody id this rearend for me?
ring gear says 3gm3984831 12 41 10 79
housing says 1254333 gm30 2pyg288 j89
what i got when i tried to id it is oct 8 1979 posi with 410 gears. is this correct? is this an 8.5 or what is it thank you

[ February 26, 2003: Message edited by: 67rscamaro ]</p>

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Old 02-26-2003, 10:41 AM
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The fastes way to check gear ratio if your not sure is count the teeth on the ring gear and divid it by the number of teeth on pinion.That will give you your gear ratio.Measure the height of the ring gear.It sould measure 8 1/2(8.5) inches or 8 1/4(8.2).
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Old 02-26-2003, 03:16 PM
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It's a 3.42 ratio, looks like a manufacturing date of 10-79. Might be an 8.5. Should have 7/16"ring gear bolts with an 11/16 hex heads.
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