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Old 07-19-2012, 07:32 PM
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still looking chevy 10 bolt drop out diff. fix

Well I called aburn gear and she didn't know of anything that would go in my differential, didn't even know anything about a drop out rearend for 62 truck. I am wondering if I will have to change out the whole axle. I hope not. What I am trying to acheve is, a limiter slip, around 279 , 308 or about that, and not have to chang out the axle,is this posible? I found a ukon gear 55T dropout but the add said it had 12 bolt cover, mine has 10. I wonder if it was a missprint. The year was corect and I could't find out if it came in limited slip.Hear are some better picturs maby it's not the unit that came with the truck, but it look's like it did,no new bolts or parts,everything looks origanal. I don't know if it helps, but the housing is't seperate from the tubes. It's a good thing Im not in a hury on the 62, If anyone can shed some lite, I will be a happy camper
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  #2 (permalink)  
Old 07-19-2012, 08:20 PM
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Contact Bruce at Randy's Ring & Pinion extention 5517 and ask him if they have anything. If anything is available he should know about it.
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Old 07-19-2012, 09:48 PM
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Quote:
Originally Posted by dirtyfingers View Post
Well I called aburn gear and she didn't know of anything that would go in my differential, didn't even know anything about a drop out rearend for 62 truck. I am wondering if I will have to change out the whole axle. I hope not. What I am trying to acheve is, a limiter slip, around 279 , 308 or about that, and not have to chang out the axle,is this posible? I found a ukon gear 55T dropout but the add said it had 12 bolt cover, mine has 10. I wonder if it was a missprint. The year was corect and I could't find out if it came in limited slip.Hear are some better picturs maby it's not the unit that came with the truck, but it look's like it did,no new bolts or parts,everything looks origanal. I don't know if it helps, but the housing is't seperate from the tubes. It's a good thing Im not in a hury on the 62, If anyone can shed some lite, I will be a happy camper
There used to be Detroit lockers for this rear end. You might find something in good shape used. These were often 4.10 and 4.56 ratio, though. Is that what you have?

Anyway, you are looking for diff/gears/etc. for a Eaton HO52 rear end. It has a 10-bolt round removable rear cover and a Hotchkiss-type removable carrier.

BTW, the 12 bolt cover rear end was probably a Dana 60.

Good luck. As they say- you're gonna need it!

Last edited by cobalt327; 07-19-2012 at 09:59 PM.
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Old 07-20-2012, 09:34 AM
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Thank's cobalt327, I just looked up the HO52 and the case, and the bolt patern are a little diferent. Will try to upload pict. of it, and mine. Im still thinking it could be a 55T but?
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Old 07-20-2012, 11:26 AM
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62 chevt rear

I looked all over the differential and finally found some #'s. My eye sight is not what it used to be. Hear are the #''s 3707340 and a circle with somthing in it and D 1. The circle and the D 1 are in the row by themself. I hope this can help me identify differential. thanks againe for all and any help.
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Old 07-20-2012, 02:00 PM
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That is NOT a HO/52 or HO72 rear diff. Is your diff a 62 1/2 ton? 5 or 6 lugs axles?
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Old 07-20-2012, 03:18 PM
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thanks prostreet6t9, it's a 6 lug
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Old 07-20-2012, 03:19 PM
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oh yes,forgot ,it's a 1/2 ton
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Old 07-20-2012, 05:26 PM
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still looking differential

found some #'s on caseing 3707340 and next to them there was a circle and D1 can I use these to look up and if so where? It's a two wheel 1/2 ton and it look's all original.
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Old 07-20-2012, 06:09 PM
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Quote:
Originally Posted by dirtyfingers View Post
found some #'s on caseing 3707340 and next to them there was a circle and D1 can I use these to look up and if so where? It's a two wheel 1/2 ton and it look's all original.
I think your on the right track for the GM55T also know as HO33 or HO35. To be honest I don't think I've seen a posi for that diff. There's not a whole lot of ratio option's either.
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Old 07-20-2012, 06:10 PM
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Quote:
Originally Posted by cobalt327 View Post

BTW, the 12 bolt cover rear end was probably a Dana 60.

Good luck. As they say- you're gonna need it!
All Dana 60's have a 10 bolt rear cover..
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Old 07-21-2012, 12:35 AM
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Quote:
Originally Posted by dirtyfingers View Post
Thank's cobalt327, I just looked up the HO52 and the case, and the bolt patern are a little diferent. Will try to upload pict. of it, and mine. Im still thinking it could be a 55T but?
I had written down 55T and 55P but got sidetracked. The 3707340 casting number comes back as a mid-50s to mid=60s 1/2 ton truck but there seems to be no consensus on the exact type but last night before I posted I saw 55T mentioned as often as any.

But regardless, you aren't going to find new production diffs. There are the usual suspects (Ricks, etc.) that you van contact or beat the bushes for a used 3.38:1 rear end to swap into it.

D 1 = letters followed by numbers are usually associated w/the date. Could be April 1st. or April of a year ending in 1, in your case it would be 1961.

There should be a ratio code on it. 3.90 was popular, MA or MD=3.90 ratio for 1/2 ton non posi; MB or ME= 3.38 ratio. Don't know if the same codes were used throughout the production run or what other codes might have been used.

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Originally Posted by prostreet6t9
To be honest I don't think I've seen a posi for that diff.
There was a LSD option available. MC or MF 3.90 w/limited slip.
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Old 07-21-2012, 12:41 AM
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Next time I'm out to the shop I will check my Chevy truck factory manuals to see what they may have in the way of the exact diff name.
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Old 07-21-2012, 09:28 AM
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ID rear

I want to thank every one for the help, I just took off the bed, sides,fenders, and I am starting to strip, and have sand blasted, so I'm not in big hurry to work on differential. I think I will give this a rest for now,and maby a swap would be the way to go. But if anyone is near N. E. Indiana and has somthing let me know, I always forget to hit the thank button, so thank's to everyone
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Old 07-21-2012, 11:36 AM
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Quote:
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There was a LSD option available. MC or MF 3.90 w/limited slip.
Available and actually installed is the trick question. I wonder how many made it out the door?

That could be a good junk yard find if someone could find some of those.
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