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Old 05-16-2018, 02:30 PM   #1
Ed Capper
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Posi unit for Eaton HO52

Does anyone know where to find a posi differential for Eaton 52? Had no problem finding one for the Dana 44 in the front but having no luck with the rear.
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Old 05-16-2018, 08:59 PM   #2
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Re: Posi unit for Eaton HO52

I only know of Detroit Lockers for the corporate rears. That's what they came with, that GM called "No-Spin". You won't find a new unit offered these days, but used units can be found or one for a 14-bolt will work with 14-bolt axles...with a little taken off the 14-bolt axle length
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Old 05-17-2018, 12:19 AM   #3
BCOWANWHEELS
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Re: Posi unit for Eaton HO52

Update to modern 14 bolt
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Old 05-17-2018, 12:36 AM   #4
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Re: Posi unit for Eaton HO52

HO52 Detroit lockers [GM no-spin] are made out of unobtanium

goodly amount of forum discussions out there, may have to do a little research for an alternative unless you can wait for a falling star..

I bought a D60 I was preparing for a swap in my K20 Burb but a friend pulled through with a complete HO52 third member with locker for me.. thankfully before any cutting took place..

good luck!
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Old 05-17-2018, 06:16 AM   #5
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Re: Posi unit for Eaton HO52

Quote:
Originally Posted by BCOWANWHEELS View Post
Update to modern 14 bolt
That, or keep it original with 14-bolt guts. Axle swaps are always an option. My '72 K2500 came with a Dana60 with Power Lok posi. But the HO52 is a tougher axle, so I have one of those with No Spin as a swap option. Because all of these rears, even the 14-bolt, are old parts with the possibility of losing parts support.
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed"

'67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi...'The 67' (project)
'72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok...'The 72'
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

Last edited by special-K; 05-17-2018 at 06:33 AM.
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Old 05-17-2018, 06:12 PM   #6
Ed Capper
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Re: Posi unit for Eaton HO52

What's involved in converting to 14 bolt axles?
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Old 05-17-2018, 06:26 PM   #7
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Re: Posi unit for Eaton HO52

Good info from member jbclassix here http://67-72chevytrucks.com/vboard/s...d.php?t=536119
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Old 05-17-2018, 07:32 PM   #8
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Re: Posi unit for Eaton HO52

I've got a couple of no spins if u need one
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Old 05-17-2018, 07:35 PM   #9
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Re: Posi unit for Eaton HO52

Detroit lockers are very hard on fuel milage and tires, you want something with clutch packs.
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Old 05-18-2018, 06:46 AM   #10
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Re: Posi unit for Eaton HO52

I beg to differ on that, sorry. After running these in many trucks over the years I have never found either to be true. Mileage is not affected by a locker. They present no more rolling resistance that an open rear. I've owned two '72 3/4t pickups that got identical mileage. Both had everything the same except the GMC had a Power-Loc and the Chevy had a No-Spin and they both got 12.5 mpg.

On rear tires wearing, you just need to know how to drive a locker. You drift it around the sharp turns, unless you like to hear the tell tale chirp and wear on your tires. I've driven trucks with lockers so much, that is how I always make my turns. At a light making a left, for instance, I give gas to get going, cut left, roll around the bend, then hit the throttle. It's a good way to drive anything to prevent fishtailing on greasy rainy streets, even with open rear. Tires on an open rear will wear less driving this way as well.
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed"

'67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi...'The 67' (project)
'72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok...'The 72'
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
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Old 05-18-2018, 10:53 AM   #11
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Re: Posi unit for Eaton HO52

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Old 05-18-2018, 01:02 PM   #12
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Re: Posi unit for Eaton HO52

now tell how they ratchet
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