Help Id rear differential Eaton HO52 or? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**SoCoC10** · 10-07-2015, 09:04 AM

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.

**kwmech** · 10-07-2015, 11:10 AM

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

Sklptrljay · 10-07-2015, 11:12 AM

Looks like it to me.

**special-K** · 10-07-2015, 11:31 PM

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

BCOWANWHEELS · 10-07-2015, 11:36 PM

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

Motorfist · 10-08-2015, 01:27 AM

Quote:

Originally Posted by BCOWANWHEELS

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

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.

BCOWANWHEELS · 10-08-2015, 01:42 AM

I,am talkiin internals,

Motorfist · 10-08-2015, 01:51 AM

Copy that and agree on internals.

**special-K** · 10-08-2015, 07:10 AM

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.

BCOWANWHEELS · 10-08-2015, 02:30 PM

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

mike16 · 10-08-2015, 05:56 PM

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.

**SoCoC10** · 10-15-2015, 11:02 PM

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.

midniteblues · 10-16-2015, 08:20 AM

Quote:

Originally Posted by BCOWANWHEELS

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

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

**Stocker** · 10-16-2015, 02:04 PM

Quote:

Originally Posted by midniteblues

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?

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

Motorfist · 10-20-2015, 06:49 PM

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

midniteblues · 10-21-2015, 07:23 AM

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.

Motorfist · 10-21-2015, 09:57 AM

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.

**SoCoC10** · 10-21-2015, 10:10 AM

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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10-07-2015, 09:04 AM	#1
SoCoC10 Senior Member Join Date: Nov 2014 Location: Colorado Posts: 3,164	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. Attached Images __________________ 07' Extcab Silverado Z71 Silver Birch, 5.3L HO 71' Cheyenne C10 Hugger Orange on Saddle SWB Besides these two, too Many to count

10-07-2015, 11:10 AM	#2
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,455	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?

10-07-2015, 11:12 AM	#3
Sklptrljay Registered User Join Date: Apr 2012 Location: Stillwater, Oklahoma Posts: 874	Re: Help Id rear differential Eaton HO52 or? Looks like it to me. __________________ 1971 C/10 SWB, 15x8 Rallys, 4.5" X 7" static drop, C-notched, 350/350, 3.73 Posi. .........A 383 and Gear Vendors are on my bucket list. 1972 GMC 4X4 K1500 Survivor - Sold No matter what problems life throws at you, your time on Earth can be incredibly fulfilling and rewarding.....if you just lower your expectations. -Phil Dunphy

10-07-2015, 11:31 PM	#4
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,862	Re: Help Id rear differential Eaton HO52 or? It's not a Dana 60 so it's a corporate HO52 __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

10-07-2015, 11:36 PM	#5
BCOWANWHEELS Registered User Join Date: Nov 2006 Location: KINGSPORT,TN. Posts: 3,035	Re: Help Id rear differential Eaton HO52 or? c-20 is ho52,c-30 is ho72 . both models are extreamly obsoliete __________________ I BELIEVE IN JOHN 3:16

10-08-2015, 01:42 AM	#7
BCOWANWHEELS Registered User Join Date: Nov 2006 Location: KINGSPORT,TN. Posts: 3,035	Re: Help Id rear differential Eaton HO52 or? I,am talkiin internals, __________________ I BELIEVE IN JOHN 3:16

10-08-2015, 01:51 AM	#8
Motorfist Registered User Join Date: Apr 2015 Location: Ririe, Idaho Posts: 136	Re: Help Id rear differential Eaton HO52 or? Copy that and agree on internals. __________________ 67 c30 Cab and Chassis (ex motorhome truck) 68 c10 LWB 70 c30 Cab and Chassis 133" converted to Longhorn 72 K10 LWB Rust Bucket Hunting Truck

10-08-2015, 07:10 AM	#9
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,862	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. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

10-08-2015, 02:30 PM	#10
BCOWANWHEELS Registered User Join Date: Nov 2006 Location: KINGSPORT,TN. Posts: 3,035	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. __________________ I BELIEVE IN JOHN 3:16

10-08-2015, 05:56 PM	#11
mike16 Registered User Join Date: Dec 2009 Location: bisbee, arizona Posts: 1,529	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.

10-15-2015, 11:02 PM	#12
SoCoC10 Senior Member Join Date: Nov 2014 Location: Colorado Posts: 3,164	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. __________________ 07' Extcab Silverado Z71 Silver Birch, 5.3L HO 71' Cheyenne C10 Hugger Orange on Saddle SWB Besides these two, too Many to count

10-20-2015, 06:49 PM	#15
Motorfist Registered User Join Date: Apr 2015 Location: Ririe, Idaho Posts: 136	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/ __________________ 67 c30 Cab and Chassis (ex motorhome truck) 68 c10 LWB 70 c30 Cab and Chassis 133" converted to Longhorn 72 K10 LWB Rust Bucket Hunting Truck

10-21-2015, 07:23 AM	#16
midniteblues Registered User Join Date: Jul 2011 Location: strausstown pa Posts: 3,394	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. __________________ 81 camaro 355 4/spd 342 posi my first love. 67 swb step 454/4spd ott 373 posi 4/7 drop. 2000 s10 zr2 little blue truck that never gets stuck. '74 heald super bronc vt8. tecumseh powered moon rover.

10-21-2015, 09:57 AM	#17
Motorfist Registered User Join Date: Apr 2015 Location: Ririe, Idaho Posts: 136	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. __________________ 67 c30 Cab and Chassis (ex motorhome truck) 68 c10 LWB 70 c30 Cab and Chassis 133" converted to Longhorn 72 K10 LWB Rust Bucket Hunting Truck

10-21-2015, 10:10 AM	#18
SoCoC10 Senior Member Join Date: Nov 2014 Location: Colorado Posts: 3,164	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!? Posted via Mobile Device



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