What is this posi rear i found today - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**bigunde** · 01-08-2005, 06:34 PM

Was in a junkyard today and found a 69-70 c-20.Wierd thing was it had dual wheels on the back.The rear end had bolts on the back cover but looked like it came out the front like the old ford 9 ".The glove box sticker said it was a posi.what is it?????

LONGHAIR · 01-08-2005, 06:47 PM

Sounds like an Eaton. It is most likely a Cab/Chassis type truck with a work box on the back. Electric Co., Phone Co., City, County, etc. It will be shorter than a "dually" pick-up axle, both wheels would sit at or near single wheel width. There were no dually pick-ups then. If you are just looking for the carrier, posi unit and gears, it should be fine.

*bisquik65* · 01-08-2005, 06:56 PM

Hey there bigunde that is a very rare ho-52 rockwell detroit locker. You can just about name your price on it too. It took me 12 years to find one for my K/20 . Look into it and you will see. Did you get it?

*Tanker350* · 01-08-2005, 07:36 PM

It might be a GM Corporate third member dropout. made in 68 only. My 68 c-20 3/4 ton HD had this.

**bigunde** · 01-08-2005, 07:44 PM

ill probably pick it up this week and put it up for sale.i dont need it for anything.thanks for the info.

**bigunde** · 01-08-2005, 07:47 PM

ill look more into it.like i said it has a smooth cover bolted to the rear and pulls out the front.so you guys no better than me,im still gonna grab it

*Tanker350* · 01-08-2005, 09:52 PM

If it is what I think of and it is a third member, even tho its HARD to find parts for, I would keep it and store it away. From others that have told me, it would kill a F@rd 9" rear-end.

**bigunde** · 01-08-2005, 09:54 PM

Thanks again for all the info.Ill get that rascal and maybe one of yall will want it

.Ill keep yall informed

*bisquik65* · 01-08-2005, 09:56 PM

Watch your fingers on pulling it. Heavy. About 100 lbs.

72dually · 01-08-2005, 10:06 PM

When you get all the bolts off, just let fall to the ground, it wont break

Rod · 01-09-2005, 12:38 AM

Of all the ones I have seen I have only seen one set of of gears...seems pretty tough to me.

The option would not say posi though..it would be "no-spin rear end" or part of that phrase.

If it said posi..make's me wonder... the dana had a "maximum traction" listing.

Regardless..if you can grab it, then grab it. Easy enough to sell here. But shipping it is pricey. You could sell just the locker if thats what it is once you take it apart. Cheap to ship just that piece.

Americanrider · 01-09-2005, 04:24 AM

How can you tell if it's a HO-52 or the HO-72? I have an Eaton under 3/4 '67 and a spare from a 3/4 '72 parts truck.

1969 GMC · 01-09-2005, 04:28 AM

Quote:

Originally Posted by Tanker350

It might be a GM Corporate third member dropout. made in 68 only. My 68 c-20 3/4 ton HD had this.

The eaton dropout third axle was made from 47 (iirc) to 72.
ho52 is the 3/4 ton version and ho72 is the one ton version. both are the same thing except for brake sizes.
the lockers for them arent that rare, I guess, I bought a complete ho52 with a locker for $100.

**bigunde** · 01-09-2005, 08:56 AM

the glove box said "no-spin"

1969 GMC · 01-09-2005, 07:47 PM

Quote:

Originally Posted by bigunde

the glove box said "no-spin"

that is tractech's commercial name for the detroit locker. grab it

**bigunde** · 01-09-2005, 07:49 PM

Should i get the entire rear or just the chunk?????

Americanrider · 01-09-2005, 10:29 PM

It looks like I have 2 of the HO-52s then. My 67's customer's build sheet is blank in the axle section, but as far as my spare? Guess I'll have to tear into it to find out if it's a locker or not.

I talked with the guys at Backbird's Custom Trucks in Spokane, they said they are OK axles but the brake parts are VERY hard to come by. They recommend the GM14blt FF, pound for pound it's a much better axle. It's easy to get parts for and can upgrade to disk brakes. If you want to stay OEM then the eaton is good, but stock up on brake hardware if you can find any.

Longhorn Man · 01-11-2005, 05:51 AM

just call napa...th4ey had everything I needed for my one ton's HO72. It DID cost an arm and a leg....at my cost it was about 150 bucks...but I had them the same day I asked for them.

Rod · 01-11-2005, 11:48 AM

It's the rear dually drums I can't find.

I did finally grab set of used ones ..from two different wrecking yard sources about 2 years apart. They are just within tolerance to pass our governent safety standards. Would be nice to find a set of real good ones still.

**bigunde** · 01-13-2005, 04:25 PM

well just talked to the salvage yard today and they want $350 for it.i dont want it but would be glad to pick it up for someone.

01-08-2005, 06:34 PM	#1
bigunde Rusty Rockerfeller Join Date: May 2003 Location: South Georgia Posts: 1,631	What is this posi rear i found today Was in a junkyard today and found a 69-70 c-20.Wierd thing was it had dual wheels on the back.The rear end had bolts on the back cover but looked like it came out the front like the old ford 9 ".The glove box sticker said it was a posi.what is it?????

01-09-2005, 12:38 AM	#11
Rod Join Date: Dec 1999 Location: Eastern - Manitoba Canada, Winnipeg Posts: 4,369	Of all the ones I have seen I have only seen one set of of gears...seems pretty tough to me. The option would not say posi though..it would be "no-spin rear end" or part of that phrase. If it said posi..make's me wonder... the dana had a "maximum traction" listing. Regardless..if you can grab it, then grab it. Easy enough to sell here. But shipping it is pricey. You could sell just the locker if thats what it is once you take it apart. Cheap to ship just that piece. __________________ 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.

01-09-2005, 04:24 AM	#12
Americanrider Registered User Join Date: Dec 2004 Location: NW, WA. Posts: 1,421	How can you tell if it's a HO-52 or the HO-72? I have an Eaton under 3/4 '67 and a spare from a 3/4 '72 parts truck. Attached Images

01-11-2005, 11:48 AM	#19
Rod Join Date: Dec 1999 Location: Eastern - Manitoba Canada, Winnipeg Posts: 4,369	It's the rear dually drums I can't find. I did finally grab set of used ones ..from two different wrecking yard sources about 2 years apart. They are just within tolerance to pass our governent safety standards. Would be nice to find a set of real good ones still. __________________ 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.

01-08-2005, 06:47 PM	#2
LONGHAIR just can't cover up my redneck Join Date: May 2004 Location: Columbus OH Posts: 11,414	Sounds like an Eaton. It is most likely a Cab/Chassis type truck with a work box on the back. Electric Co., Phone Co., City, County, etc. It will be shorter than a "dually" pick-up axle, both wheels would sit at or near single wheel width. There were no dually pick-ups then. If you are just looking for the carrier, posi unit and gears, it should be fine.

01-08-2005, 06:56 PM	#3
bisquik65 Account Suspended Join Date: Apr 2004 Location: N.C. high country Posts: 6,107	Hey there bigunde that is a very rare ho-52 rockwell detroit locker. You can just about name your price on it too. It took me 12 years to find one for my K/20 . Look into it and you will see. Did you get it?

01-08-2005, 07:36 PM	#4
Tanker350 Account Suspended Join Date: Dec 2003 Location: Palm Desert, Ca Posts: 410	It might be a GM Corporate third member dropout. made in 68 only. My 68 c-20 3/4 ton HD had this.

01-08-2005, 07:44 PM	#5
bigunde Rusty Rockerfeller Join Date: May 2003 Location: South Georgia Posts: 1,631	ill probably pick it up this week and put it up for sale.i dont need it for anything.thanks for the info.

01-08-2005, 07:47 PM	#6
bigunde Rusty Rockerfeller Join Date: May 2003 Location: South Georgia Posts: 1,631	ill look more into it.like i said it has a smooth cover bolted to the rear and pulls out the front.so you guys no better than me,im still gonna grab it

01-08-2005, 09:52 PM	#7
Tanker350 Account Suspended Join Date: Dec 2003 Location: Palm Desert, Ca Posts: 410	If it is what I think of and it is a third member, even tho its HARD to find parts for, I would keep it and store it away. From others that have told me, it would kill a F@rd 9" rear-end.

01-08-2005, 09:54 PM	#8
bigunde Rusty Rockerfeller Join Date: May 2003 Location: South Georgia Posts: 1,631	Thanks again for all the info.Ill get that rascal and maybe one of yall will want it .Ill keep yall informed

01-08-2005, 09:56 PM	#9
bisquik65 Account Suspended Join Date: Apr 2004 Location: N.C. high country Posts: 6,107	Watch your fingers on pulling it. Heavy. About 100 lbs.

01-08-2005, 10:06 PM	#10
72dually Senior Member Join Date: Apr 2004 Location: Northern Arizona Posts: 687	When you get all the bolts off, just let fall to the ground, it wont break

01-09-2005, 08:56 AM	#14
bigunde Rusty Rockerfeller Join Date: May 2003 Location: South Georgia Posts: 1,631	the glove box said "no-spin"



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01-09-2005, 07:49 PM	#16
bigunde Rusty Rockerfeller Join Date: May 2003 Location: South Georgia Posts: 1,631	Should i get the entire rear or just the chunk?????

01-09-2005, 10:29 PM	#17
Americanrider Registered User Join Date: Dec 2004 Location: NW, WA. Posts: 1,421	It looks like I have 2 of the HO-52s then. My 67's customer's build sheet is blank in the axle section, but as far as my spare? Guess I'll have to tear into it to find out if it's a locker or not. I talked with the guys at Backbird's Custom Trucks in Spokane, they said they are OK axles but the brake parts are VERY hard to come by. They recommend the GM14blt FF, pound for pound it's a much better axle. It's easy to get parts for and can upgrade to disk brakes. If you want to stay OEM then the eaton is good, but stock up on brake hardware if you can find any.

01-11-2005, 05:51 AM	#18
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	just call napa...th4ey had everything I needed for my one ton's HO72. It DID cost an arm and a leg....at my cost it was about 150 bucks...but I had them the same day I asked for them.

01-13-2005, 04:25 PM	#20
bigunde Rusty Rockerfeller Join Date: May 2003 Location: South Georgia Posts: 1,631	well just talked to the salvage yard today and they want $350 for it.i dont want it but would be glad to pick it up for someone.

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