need help to id this rearend out of a c30 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

oldno7 · 03-19-2013, 04:48 AM

http://67-72chevytrucks.com/vboard/p...ictureid=17224

Tx Firefighter · 03-19-2013, 07:21 AM

It's most likely an HO72 or could possibly be an HO52. We'd need to see the front side to tell for sure.

They are good stout rear ends but brake parts can put you in the poorhouse if you can even find them. A lot of guys are converting them to disc brakes to get away from the hard to find part issue.
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b.eddy's72 · 03-19-2013, 08:48 AM

Agree with Texas Firefighter..............1 tons should have the HO72 and 3/4 should be the HO52 if it is a Eaton.

Been told that the disk brake brackets from a 14 bolt ff will work. Also that the entire backing plate and all the brake hardware will convert from the 14 bolt ff.

I priced the entire rear brake system for mine, hardware and all for less than $100 which I didnt think was to bad.

**special-K** · 03-19-2013, 10:21 AM

x3

That's true. You can mount complete 14-bolt brakes to the Corporate HO52/72s

**DeadheadNM** · 03-19-2013, 10:29 AM

My HO52 was recently rebuilt and there was no problem getting brake parts. I probably should have upgraded to disc brakes though....

oldno7 · 03-19-2013, 11:21 AM

ok guys i will have to get more pics in next few days and i will put them on here. oldno7

Tx Firefighter · 03-19-2013, 11:31 AM

HO52 and HO72 center sections are interchangeable. The difference is the heavier HO72 uses a stop bolt to brace the pinion under extreme load.

The best resource on these old rear ends is Pirate 4x4. Those guys are crazy for them.
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**special-K** · 03-19-2013, 01:03 PM

What we need to see are the outer ends. The difference between a 52 and a 72 is in the backing plates-out. Even some HO52s have the stop bolt. A C/30 Stepside or single rear cab & chassis would have a rear axle like this,if it is an HO72,which looks just like an HO52. If this is the original axle it's an HO72.

oldno7 · 03-24-2013, 02:43 PM

http://67-72chevytrucks.com/vboard/a...1&d=1364150567

oldno7 · 03-24-2013, 02:45 PM

Sorry guys not very good pics, not sure if these help. I appriciate you trying to help though.

03-19-2013, 04:48 AM	#1
oldno7 Registered User Join Date: Jan 2007 Location: Ill. Posts: 584	need help to id this rearend out of a c30 http://67-72chevytrucks.com/vboard/p...ictureid=17224 __________________ Hi everyone, It's nice to know there's other people just as crazy about these old trucks as I am. oldno7

03-19-2013, 07:21 AM	#2
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Re: need help to id this rearend out of a c30 It's most likely an HO72 or could possibly be an HO52. We'd need to see the front side to tell for sure. They are good stout rear ends but brake parts can put you in the poorhouse if you can even find them. A lot of guys are converting them to disc brakes to get away from the hard to find part issue. Posted via Mobile Device

03-19-2013, 08:48 AM	#3
b.eddy's72 Registered User Join Date: Nov 2009 Location: WEATHEROFRD, TX Posts: 164	Re: need help to id this rearend out of a c30 Agree with Texas Firefighter..............1 tons should have the HO72 and 3/4 should be the HO52 if it is a Eaton. Been told that the disk brake brackets from a 14 bolt ff will work. Also that the entire backing plate and all the brake hardware will convert from the 14 bolt ff. I priced the entire rear brake system for mine, hardware and all for less than $100 which I didnt think was to bad. __________________ 72 Chevy LB, LS in the works, 4L80, Grandfather bought it brand new. 66 GMC Short Step, 84 Front Suspension, many more mods to come 67 Chevy 3/4 Ton, 327, Auto, Factory A/C Ya must have been movin cause I was haulin a*$ when I passed you

03-19-2013, 10:21 AM	#4
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: need help to id this rearend out of a c30 x3 That's true. You can mount complete 14-bolt brakes to the Corporate HO52/72s __________________ "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 ~

03-19-2013, 10:29 AM	#5
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,453	Re: need help to id this rearend out of a c30 My HO52 was recently rebuilt and there was no problem getting brake parts. I probably should have upgraded to disc brakes though.... __________________ 1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 Members met: ORANGBLAZ, 2003 silverado, MikeCofield, BB72CHEVKT, Duncan&Son, Sameyrasmea72, THENEWMEXICAN, HotRod C/10, brianthelion02, Sport/Truck, ryanroo, michael bustamante, Dirt's72, Already Gone, WestButteTruck, 57taskforce, Moreyel, painterljp, AASmedic, SoCoC10, Lumaestas, carbuff382, Chevyland

03-19-2013, 11:21 AM	#6
oldno7 Registered User Join Date: Jan 2007 Location: Ill. Posts: 584	Re: need help to id this rearend out of a c30 ok guys i will have to get more pics in next few days and i will put them on here. oldno7 __________________ Hi everyone, It's nice to know there's other people just as crazy about these old trucks as I am. oldno7

03-19-2013, 11:31 AM	#7
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Re: need help to id this rearend out of a c30 HO52 and HO72 center sections are interchangeable. The difference is the heavier HO72 uses a stop bolt to brace the pinion under extreme load. The best resource on these old rear ends is Pirate 4x4. Those guys are crazy for them. Posted via Mobile Device

03-19-2013, 01:03 PM	#8
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: need help to id this rearend out of a c30 What we need to see are the outer ends. The difference between a 52 and a 72 is in the backing plates-out. Even some HO52s have the stop bolt. A C/30 Stepside or single rear cab & chassis would have a rear axle like this,if it is an HO72,which looks just like an HO52. If this is the original axle it's an HO72. __________________ "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 ~

03-24-2013, 02:43 PM	#9
oldno7 Registered User Join Date: Jan 2007 Location: Ill. Posts: 584	Re: need help to id this rearend out of a c30 http://67-72chevytrucks.com/vboard/a...1&d=1364150567 Attached Images __________________ Hi everyone, It's nice to know there's other people just as crazy about these old trucks as I am. oldno7

03-24-2013, 02:45 PM	#10
oldno7 Registered User Join Date: Jan 2007 Location: Ill. Posts: 584	Re: need help to id this rearend out of a c30 Sorry guys not very good pics, not sure if these help. I appriciate you trying to help though. __________________ Hi everyone, It's nice to know there's other people just as crazy about these old trucks as I am. oldno7



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