Diffy ID and trailing arm question.... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Cat Fuzz · 06-01-2004, 09:45 PM

K, I'm just curious what this rear end is. It's a monster, I know that.

Do I need to replace this trailing arm? The other side isn't like this.

jostrans68 · 06-01-2004, 10:12 PM

ho52 h072 differential and I would replace that arm Good luck

**COBALT** · 06-02-2004, 10:53 AM

Yep, the legendary HO52. Probably with 4.10 gears. Since it's coil sprung you've got a 3/4 ton truck - I'm guessing '69?

Typical carrier with good-old one wheel wonder. If it's in good shape keep it that way, because once they go south basically plan on swapping in a Dana 60 or something. Keep it sealed tight with clean oil. The parts are no longer available with the exception of a new ring/pinion. I had mine rebuild and shouldn't have. Ended up with a good differential, but it was expensive. 3.90 gears + a detroit locker at the time, but now the locker isn't available for them any more either, so you'd be SOL...

**COBALT** · 06-02-2004, 10:57 AM

Oh, and your trailing arms have been abused as heck. You can find a good set of used ones and have them patched up at the local weld shop. Then coat them with something and throw in some new bushings and new U-bolts for the axle. That's what I did with mine and they look brand new. I don't think yours are salvageable though. You might be able to separate the reinforcement plate from the beam, and re-weld them together after cleaning, but it looks pretty rusted.

06-01-2004, 09:45 PM	#1
Cat Fuzz My son, my joy. Join Date: Sep 2003 Location: Spokane WA Posts: 463	Diffy ID and trailing arm question.... K, I'm just curious what this rear end is. It's a monster, I know that. Do I need to replace this trailing arm? The other side isn't like this.

06-01-2004, 10:12 PM	#2
jostrans68 Jostrans68 Join Date: Mar 2001 Location: Bloomington indiana Posts: 1,182	ho52 h072 differential and I would replace that arm Good luck __________________ [CGTW Member former 67-72 now with a 96 silverado

06-02-2004, 10:53 AM	#3
COBALT Senior Member Join Date: Sep 2001 Location: Seattle, WA, USA Posts: 5,817	Yep, the legendary HO52. Probably with 4.10 gears. Since it's coil sprung you've got a 3/4 ton truck - I'm guessing '69? Typical carrier with good-old one wheel wonder. If it's in good shape keep it that way, because once they go south basically plan on swapping in a Dana 60 or something. Keep it sealed tight with clean oil. The parts are no longer available with the exception of a new ring/pinion. I had mine rebuild and shouldn't have. Ended up with a good differential, but it was expensive. 3.90 gears + a detroit locker at the time, but now the locker isn't available for them any more either, so you'd be SOL... __________________ '69 3/4 ton C20 2wd-350ci/TH400 '69 3/4 ton Custom 20 2wd-350ci/4sp Manual '99 2wd 5.7 Chevy Tahoe Seattle, WA.

06-02-2004, 10:57 AM	#4
COBALT Senior Member Join Date: Sep 2001 Location: Seattle, WA, USA Posts: 5,817	Oh, and your trailing arms have been abused as heck. You can find a good set of used ones and have them patched up at the local weld shop. Then coat them with something and throw in some new bushings and new U-bolts for the axle. That's what I did with mine and they look brand new. I don't think yours are salvageable though. You might be able to separate the reinforcement plate from the beam, and re-weld them together after cleaning, but it looks pretty rusted. __________________ '69 3/4 ton C20 2wd-350ci/TH400 '69 3/4 ton Custom 20 2wd-350ci/4sp Manual '99 2wd 5.7 Chevy Tahoe Seattle, WA.



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