pics of C20 rear ends? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

WB72 · 04-11-2004, 04:34 PM

Can anyone point me in the right direction to find out which rear end I have? Pictures will work for me best.

The rear cover is perfectly round and has 10 bolts as well as the fill hole.

The front is finned and offset to the Pass side and has 10 bolts as well.

Sorry I don't have access to a camera to post mine.

1969 GMC · 04-11-2004, 05:08 PM

does it look like this?

or this?

the first axle is an Eaton HO52, easily ID'ed because of the large round diff. the second is a dana 60, which has a different shape to it. both have 10 bolts holding the cover on.

**JIMs70GMC** · 04-11-2004, 06:18 PM

It's probably the H052 if it's round w/ a cover and drop out center section.

Rod · 04-11-2004, 07:24 PM

corporation diff..a.k.a. eaton a.k.a. ho52

WB72 · 04-11-2004, 09:19 PM

I believe it is an Eaton HO52.

Were they used in any other vehicles that you know of?

Blue_71 · 04-11-2004, 10:48 PM

id have to agree on the eaton also

Chevyguy111786 · 04-12-2004, 01:14 AM

are these eaton's worth any money, i have one that has new breaks and new insides....works great, but i don't need it.

Rod · 04-12-2004, 11:10 AM

Cant think of first year the eaton ho52 was used but probably 47-72. Tough diff... parts are not readily available new... but after 35 years in some of my trucks there still good.
Some of these have an optional detroit locker in them... detroit lockers are worth some money.
I cant find any new rear drake drums for my duallie that has one of these type diffs be it called a ho72.
I think I saw something very similar in an international truck... so I assume they were used in other vehicles also. Thats not so unusual.. happens often by parts suppliers. I like them and have a spare if I need it for parts. Their heavy to move.

04-11-2004, 04:34 PM	#1
WB72 Before and After Join Date: Feb 2000 Location: Leduc, Alberta CANADA Posts: 632	pics of C20 rear ends? Can anyone point me in the right direction to find out which rear end I have? Pictures will work for me best. The rear cover is perfectly round and has 10 bolts as well as the fill hole. The front is finned and offset to the Pass side and has 10 bolts as well. Sorry I don't have access to a camera to post mine. __________________ Not Grandpa's C-20 anymore... 383 Stroker 425HP, 485Ft/Lbs Lowered 3.5" Front / 5" Rear 66,000 miles. Alberta, CANADA

04-11-2004, 05:08 PM	#2
1969 GMC Registered User Join Date: Feb 2003 Location: The Rubber City Posts: 5,498	does it look like this? or this? the first axle is an Eaton HO52, easily ID'ed because of the large round diff. the second is a dana 60, which has a different shape to it. both have 10 bolts holding the cover on. __________________ 1969 GMC K2500 1996 Honda Accord 2007 Kawasaki KLR 650

04-11-2004, 06:18 PM	#3
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	It's probably the H052 if it's round w/ a cover and drop out center section. __________________ 1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm

04-11-2004, 07:24 PM	#4
Rod Join Date: Dec 1999 Location: Eastern - Manitoba Canada, Winnipeg Posts: 4,369	corporation diff..a.k.a. eaton a.k.a. ho52 __________________ Senior active founding member. 70 3/4 ton GMC Suburban 4x4 250/4 spd. 71 1/2 ton Suburban Chevy 4x4, 350/350 72 Chev 1 ton tow truck 402BB w/Holmes 440 wrecker on propane 2005 FLSTSCI Harley Springer 85 FXSB Harley Lowrider 72 Triumph 650 Bonneville 5spd "Poor people don't have hobbies" Quote from wife.

04-11-2004, 09:19 PM	#5
WB72 Before and After Join Date: Feb 2000 Location: Leduc, Alberta CANADA Posts: 632	I believe it is an Eaton HO52. Were they used in any other vehicles that you know of? __________________ Not Grandpa's C-20 anymore... 383 Stroker 425HP, 485Ft/Lbs Lowered 3.5" Front / 5" Rear 66,000 miles. Alberta, CANADA

04-12-2004, 01:14 AM	#7
Chevyguy111786 Registered User Join Date: Apr 2003 Location: Garland, Texas Posts: 1,127	are these eaton's worth any money, i have one that has new breaks and new insides....works great, but i don't need it.

04-12-2004, 11:10 AM	#8
Rod Join Date: Dec 1999 Location: Eastern - Manitoba Canada, Winnipeg Posts: 4,369	Cant think of first year the eaton ho52 was used but probably 47-72. Tough diff... parts are not readily available new... but after 35 years in some of my trucks there still good. Some of these have an optional detroit locker in them... detroit lockers are worth some money. I cant find any new rear drake drums for my duallie that has one of these type diffs be it called a ho72. I think I saw something very similar in an international truck... so I assume they were used in other vehicles also. Thats not so unusual.. happens often by parts suppliers. I like them and have a spare if I need it for parts. Their heavy to move. __________________ Senior active founding member. 70 3/4 ton GMC Suburban 4x4 250/4 spd. 71 1/2 ton Suburban Chevy 4x4, 350/350 72 Chev 1 ton tow truck 402BB w/Holmes 440 wrecker on propane 2005 FLSTSCI Harley Springer 85 FXSB Harley Lowrider 72 Triumph 650 Bonneville 5spd "Poor people don't have hobbies" Quote from wife.



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.