Help Id rear differential Eaton HO52 or?
 

Like the title says I just want to confirm the rear differential out of my 67 C20 is a Eaton HO52? I had no problems with it just swapped to 5 on 5" rear diff to complete my C20 long bed to C10 Short bed conversion. New diff has a little more freeway friendly 3.73 ratio vs old diffs 4.10.

Re: Help Id rear differential Eaton HO52 or?
 

Looks like one to me, how many bolts holding the 3rd member in and the rear cover?

Re: Help Id rear differential Eaton HO52 or?
 

Looks like it to me.

Re: Help Id rear differential Eaton HO52 or?
 

It's not a Dana 60 so it's a corporate HO52

Re: Help Id rear differential Eaton HO52 or?
 

c-20 is ho52,c-30 is ho72 . both models are extreamly obsoliete

Re: Help Id rear differential Eaton HO52 or?
 

Well you're half right. I wouldn't say they are extremely obsolete. I'm doing gaskets and seals in my sons ho72 this week. Napa had everything in stock. They can be modified with 14 bolt brakes if desired and are generally tough as hell.

Re: Help Id rear differential Eaton HO52 or?
 

I,am talkiin internals,

Re: Help Id rear differential Eaton HO52 or?
 

Copy that and agree on internals.

Re: Help Id rear differential Eaton HO52 or?
 

They'll be extremely obsolete once no more good used parts are available... if it ever needs any. As it is now, the driveshaft turns the pinion, the pinion turns the ring gear, the ring gear turns the axle shafts, and the wheels roll on down the road just the same as a brand new truck or the one that comes out next year.

Re: Help Id rear differential Eaton HO52 or?
 

I,d clean out the diff real well and install syn lube. it will help it live aloot longer.

Re: Help Id rear differential Eaton HO52 or?
 

its an HO 52. certainly NOT obsolete. parts support for the generic stuf is still available, the rest NOS through ebay or used... just about anywere. A good rear end. Do a search here or better yet over in the driveleline section to learn more and interesting things about this near bullet proof rear. And also lots of info onother 4x4 specific forums.

Re: Help Id rear differential Eaton HO52 or?
 

Thanks for the help guys. I posted an ad for it in the parts for sale area if one of you or someone you know is looking for one.

Re: Help Id rear differential Eaton HO52 or?
 

I have been lookin at a 71 9ft stepper 1ton. I thought the rear in this truck is a ho52. Am I wrong? it's all oe would it be ho72?

Op sorry for the jack

Re: Help Id rear differential Eaton HO52 or?
 

Yup -- an original Eaton in a 1-ton will be an HO72.

Re: Help Id rear differential Eaton HO52 or?
 

Correct and here is a handy tech article with part numbers for gaskets and seals etc.
http://www.stovebolt.com/techtips/ax...Ton%20Upgrade/

Re: Help Id rear differential Eaton HO52 or?
 

Thanks for the info guys. I know this truck will need brake work but not sure where the problem is.
are the brake parts hard too find? I really didn't look around yet since I'm not sure what's wrong with it.

Re: Help Id rear differential Eaton HO52 or?
 

Drums are hard to find but shoes, wheel cylinders and spring kits are readily available.
If your drums are bad and you can't dig any up, there is a way to use 14 bolt brakes and axle shafts but it requires a little machine work. Some guys just swap in a 14 bolt axle at that point.

Re: Help Id rear differential Eaton HO52 or?
 

Sold the center section/3rd member to a board member here. Someone can have the rest of it for FREE! Come get it! The housing, axles, brakes, brake cables, etc. FREE! Everything but the carrier, ring and pinion for FREE! Did I mention FREE!?
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