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Old 02-21-2004, 03:04 PM
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10 bolt posi 8.5" rear end

I just found a 10 bolt 8.5" posi rear end that is in a 68 chevelle, but I believe it is a Buick rear end, I have the code off the tube but can't find anything on it, hope some one can decode this for me.

SBB0531

Also found a 12 bolt non posi 2.73 gears in a 70 chevelle, they want $500 for it, can some one tell me about how much it would cost to have 3.73 gears and a posi unit put in by a shop?

Thanks,

406chevelle

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Old 02-21-2004, 04:29 PM
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Hang on to your wallet, I mean hat!! You are talking $1000 +or - a few.

Trees
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Old 02-21-2004, 07:00 PM
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The 8.5 that GM started using in the early 70's is a corporate rearend, GM used these rearends in all A-bodies and they all have the C-clip axles. The 8.2's was where you got into the difference between Chevy Rearends and those used in B-O-P applications.
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Old 02-21-2004, 07:38 PM
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Thanks for the replies guys.

Can anyone tell me what gear ratio this rear end has by the code from the axle tube???

SBB0531

I can't find anything to tell me what the first to letters "SB" for gear ratio are???

The third letter "B" from what I can find is for Buick.

My big problem is what gear ratio is in this rear end???

Thanks,

406chevelle
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Old 02-21-2004, 10:11 PM
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i'll buy that from ya 406

if your wantin to get rid of it, im alwas here waitin, i have a 65 lemans it would fit nice on.
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Old 02-22-2004, 06:09 AM
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I don't know about how to track down the codes on the housing right now but I like to pull the rear cover and see what numbers are on the ring gear, i.e. 36-10, 40-11 to see exactly what gear is in it because there is always a chance the gears could have been changed.
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Old 02-23-2004, 06:18 PM
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Ok guys stop messing around I know one of you rear end guru's knows the gear ratio for this axle code SBB0531 come on just tell me, LOL

Thanks for the responses, I can't pull the cover off, because it is about 60 miles away, was kinda hope I could find out what gears it has before I drive out there.

406chevelle
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Old 02-23-2004, 09:51 PM
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406 -

The only mention I can find of an SB code on a GM rear axle is for Oldsmobile, 1965-1969 (higher?), and it meant 2.78 ratio posi. Could be a BOP 8.2-inch rear??

Eric

I looked through both the 65-69 and 70-75 Chevrolet by the Numbers, and didn't see anything close to an SB code rear on the Bowtie side of the house.

I looked through both the 65-69 and 70-75 Chevrolet by the Numbers, and didn't see anything close to an SB code rear on the Bowtie side of the house.
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