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  #1 (permalink)  
Old 11-16-2012, 08:27 AM
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What rearend is this?

I cant figure out what gm rearend this is its a 10 bolt
These are the numbers stamped on the axel tube
BWH C262 2
Thanks
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Old 11-16-2012, 09:18 AM
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7.5 GM 10 bolt. Probably from a S10. You didn't show pictures of any brackets or mounts, so I can't say for sure.
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Old 11-16-2012, 09:51 AM
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Thanks big gear head
here are a couple pics of the rearend
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Old 11-16-2012, 10:55 AM
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7.5, the 8.5 has square ears near the bottom, the 8.2 has a different cover.

K
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Old 11-16-2012, 11:06 AM
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so what your saying killerformula its a 7.5 Chevy S10?
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Old 11-16-2012, 03:12 PM
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Unless I'm mistaken it looks like the original spring perches were removed and what is on there now was welded on.

The stamped in code from the axle tube (BWH) should tell you what the ratio was originally and if it was limited slip or not- but I do not know a source for the codes for the 7.5"/7.625" diffs... so if anyone has these codes, I'd appreciate a link to them.

The easiest way to determine the ratio is going to be pulling the cover and counting teeth or look for the stamped-in numbers on the edge of the ring gear. It will look something like 10 40 (4.10:1), etc.
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Old 11-16-2012, 03:22 PM
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Yea, that's a S10 7.5 rear end. Those are S10 spring perches. It's an early version because it has the older type housing end with the large bolt at the top and 2 small botls at the bottom. The later S10 rear ends had the 4 bolt housing ends.

Last edited by big gear head; 11-16-2012 at 03:28 PM.
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Old 11-16-2012, 03:23 PM
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Thanks cobalt327 for the input
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Old 11-16-2012, 03:29 PM
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Any idea of year?
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Old 11-16-2012, 03:49 PM
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The code C262- if a date code like it appears to be- would be March 26 of a year ending in 2. '82, '92, etc. I don't know enough of the specifics of S-10 rearends to help more than that. Did you see big gear head's post right before yours, above?
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Old 11-16-2012, 03:51 PM
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sounds good gives me some idea of what it is
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Old 11-16-2012, 04:59 PM
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By '92 they had already gone to the 4 bolt backing plates on the brakes. This one is earlier than that.
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Old 11-16-2012, 05:29 PM
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Thats good to no on the 4 bolt backing plates
Thanks big gear head
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Old 11-16-2012, 08:23 PM
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Quote:
Originally Posted by cobalt327 View Post
It will look something like 10 40 (4.10:1), etc.
Not to be nit picky, but a 10 tooth pinion and a 40 tooth ring is not a 4.10:1. It's a 4.0:1. A 10 tooth pinion and a 41 tooth ring = 4.10:1.
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Old 11-17-2012, 05:47 AM
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Aah, thanks. Good to know there are guys like you keeping me honest.
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