Really could use some help on this one! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

king-918 · 10-23-2013, 10:50 PM

Is this a normal or a cracked case? Can it be repaired or just replace. Vehicle will make about 420hp

king-918 · 10-23-2013, 11:00 PM

Did I order the wrong shafts or am I missing something

'

Desert1957 · 10-23-2013, 11:52 PM

WOW entire housing is cracked? Never seen one that bad.

Definitely NOT repairable.

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Desert

INSIDIOUS '86 · 10-23-2013, 11:56 PM

No it's done. And those arms may have thier own special part.

kalbert · 10-23-2013, 11:57 PM

Housing looks busted, but a local machine shop can magnaflux it if you're in doubt. If it is broken its scrap iron. There's no fixing that.

The control arm shafts look right, but there's no bushings in your photos.

king-918 · 10-24-2013, 05:10 AM

Thought it was done, but the weird thing is that x shaft will not fit no matter what angle I chose

andrewmp6 · 10-24-2013, 09:41 AM

Yeah the rear end housing is toast,On the cross shafts talk to michigan metal works see what he says about that.

Ski-me · 10-24-2013, 10:15 AM

I don't know which truck you are running but it looks to be a 10 or 12 Bolt Axle?!? If you are in the 400 HP range, I'd probably be considering at least a 9.5" SF axle for strength.

What axle do you have? Gear ratio? Truck?

frog210 · 10-24-2013, 12:10 PM

if Michigan metal works is anything like porterbuilt i think they have specific shafts, might want to give them a call, my uca's shafts came with my porterbulilt arms, each company is different
like for example:
Portebuilt pic
Strongarms pic

INSIDIOUS '86 · 10-24-2013, 01:44 PM

Quote:

Originally Posted by Ski-me

I don't know which truck you are running but it looks to be a 10 or 12 Bolt Axle?!? If you are in the 400 HP range, I'd probably be considering at least a 9.5" SF axle for strength.

What axle do you have? Gear ratio? Truck?

The 8.5 ten bolt will hold a 600hp big block when built. Buick regales are running 8s with them. Pretty much good enough for me

king-918 · 10-24-2013, 03:39 PM

Quote:

Originally Posted by INSIDIOUS '86

The 8.5 ten bolt will hold a 600hp big block when built. Buick regales are running 8s with them. Pretty much good enough for me

It's a 12 bolt in an 86,now I need to find another axle shell to rebuild. I wasn't worried about if a 12 bolt would hold I know it will just was curious about that power on a crack. I also think the reason the x shafts wouldn't fit is because they are problem solving shafts

russgt · 10-24-2013, 09:27 PM

Quote:

Originally Posted by INSIDIOUS '86

The 8.5 ten bolt will hold a 600hp big block when built. Buick regales are running 8s with them. Pretty much good enough for me

Yes, but they are not exactly stock.

king-918 · 10-25-2013, 12:33 AM

What years can you find a 12 bolt? looks like I'm in need of a good rebuildable core

andrewmp6 · 10-25-2013, 02:18 AM

I think anything 73-87 should have it as a option.

INSIDIOUS '86 · 10-25-2013, 02:35 AM

70s trucks typically had 1/ bolts and 80s trucks got the corporate ten.

Billy81 · 10-25-2013, 02:35 AM

I think 81 was the last year for the 12 bolt in our trucks.

andrewmp6 · 10-26-2013, 03:04 AM

420hp but how much torque are you going to have?

Jonboy · 10-26-2013, 07:55 AM

A 1/2 ton 4x4 rear 12 bolt will work as well; you just have to swap axle shafts.

Unca · 10-26-2013, 08:02 AM

10 bolts are cheap n easy to find. 12 bolt internals fit in them with a little work and are much stronger. The cracked housing is interesting, wheel hop? or speed impact? overloading shouldn't have cracked it that way.
the arms, id go to the company you got them from the replacement part looks like its not going to fit, don't forget the 3/8 inch or so of bushing that also has to fit in the gap.

SCOTI · 10-27-2013, 12:14 AM

Quote:

Originally Posted by king-918

What years can you find a 12 bolt? looks like I'm in need of a good rebuildable core

I have 2 of them if you get back to see your relatives over the holidays & don't find one before then. I used the standard Moog shafts w/o issue so it might be the offset that is causing you trouble.

king-918 · 10-27-2013, 04:27 PM

Quote:

Originally Posted by SCOTI

I have 2 of them if you get back to see your relatives over the holidays & don't find one before then. I used the standard Moog shafts w/o issue so it might be the offset that is causing you trouble.

Did you get my text?

SCOTI · 10-27-2013, 09:08 PM

Quote:

Originally Posted by king-918

Did you get my text?

Yes I did but have been out all day. I'll give you a shout after work tomorrow?

esbstuff · 10-27-2013, 09:48 PM

You need a girdle! (not your grandma's) Also I would use an older 12 bolt instead of the later one. I've never tore up an older one...

king-918 · 10-27-2013, 11:24 PM

Quote:

Originally Posted by esbstuff

You need a girdle! (not your grandma's) Also I would use an older 12 bolt instead of the later one. I've never tore up an older one...

Okay

Quote:

Originally Posted by SCOTI

Yes I did but have been out all day. I'll give you a shout after work tomorrow?

Thanks

10-23-2013, 10:50 PM	#1
king-918 Registered User Join Date: Nov 2011 Location: Oklahoma City Oklahoma Posts: 1,056	Really could use some help on this one! Is this a normal or a cracked case? Can it be repaired or just replace. Vehicle will make about 420hp __________________ <----Christopher My Tardis Oh yeah I'm really a Toyota guy, but had some stuff sitting around. Oklahoma

10-23-2013, 11:00 PM	#2
king-918 Registered User Join Date: Nov 2011 Location: Oklahoma City Oklahoma Posts: 1,056	Re: Really could use some help on this one! Did I order the wrong shafts or am I missing something ' __________________ <----Christopher My Tardis Oh yeah I'm really a Toyota guy, but had some stuff sitting around. Oklahoma

10-23-2013, 11:52 PM	#3
Desert1957 Registered User Join Date: Apr 2009 Location: New Freedom Pa. Posts: 1,335	Re: Really could use some help on this one! WOW entire housing is cracked? Never seen one that bad. Definitely NOT repairable. Desert

10-23-2013, 11:56 PM	#4
INSIDIOUS '86 Registered User Join Date: Jul 2009 Location: washington Posts: 4,178	Re: Really could use some help on this one! No it's done. And those arms may have thier own special part. __________________ 377 sbc thumpr cam autogear m23 muncie 3:73 Detroit trutrac 3''spintech prostreet mufflers xpipe 1 3/4 headers build thread !http://67-72chevytrucks.com/vboard/s...d.php?t=577217 Iroc gauge threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=554511

10-23-2013, 11:57 PM	#5
kalbert Registered User Join Date: Jun 2012 Location: Minnesota Posts: 509	Re: Really could use some help on this one! Housing looks busted, but a local machine shop can magnaflux it if you're in doubt. If it is broken its scrap iron. There's no fixing that. The control arm shafts look right, but there's no bushings in your photos.

10-24-2013, 05:10 AM	#6
king-918 Registered User Join Date: Nov 2011 Location: Oklahoma City Oklahoma Posts: 1,056	Re: Really could use some help on this one! Thought it was done, but the weird thing is that x shaft will not fit no matter what angle I chose __________________ <----Christopher My Tardis Oh yeah I'm really a Toyota guy, but had some stuff sitting around. Oklahoma

10-24-2013, 09:41 AM	#7
andrewmp6 Registered User Join Date: Jan 2009 Location: Louisville,Ky Posts: 5,811	Re: Really could use some help on this one! Yeah the rear end housing is toast,On the cross shafts talk to michigan metal works see what he says about that.

10-24-2013, 10:15 AM	#8
Ski-me Registered User Join Date: May 2012 Location: Colo Springs, CO Posts: 870	Re: Really could use some help on this one! I don't know which truck you are running but it looks to be a 10 or 12 Bolt Axle?!? If you are in the 400 HP range, I'd probably be considering at least a 9.5" SF axle for strength. What axle do you have? Gear ratio? Truck? __________________ - Jeff 89' K5 Blazer, 2.5" lift, 35" tires 04' GMC Yukon XL, 3/4 ton, 8.1L Last edited by Ski-me; 10-24-2013 at 10:23 AM.

10-24-2013, 12:10 PM	#9
frog210 Registered User Join Date: Mar 2012 Location: San Antonio, Tx Posts: 784	Re: Really could use some help on this one! if Michigan metal works is anything like porterbuilt i think they have specific shafts, might want to give them a call, my uca's shafts came with my porterbulilt arms, each company is different like for example: Portebuilt pic Strongarms pic Attached Images __________________ San Antonio, TEXAS -Frog -I'm a valet and well I've driven BMWs, Mercedes, Porsche,Bentlys, fiats, Hondas, etc and well even do I like a few features, I love my shortbed, it dosent bore me out, just press on the gas and you'll remember why you love it.

10-25-2013, 12:33 AM	#13
king-918 Registered User Join Date: Nov 2011 Location: Oklahoma City Oklahoma Posts: 1,056	Re: Really could use some help on this one! What years can you find a 12 bolt? looks like I'm in need of a good rebuildable core __________________ <----Christopher My Tardis Oh yeah I'm really a Toyota guy, but had some stuff sitting around. Oklahoma

10-25-2013, 02:18 AM	#14
andrewmp6 Registered User Join Date: Jan 2009 Location: Louisville,Ky Posts: 5,811	Re: Really could use some help on this one! I think anything 73-87 should have it as a option.

10-25-2013, 02:35 AM	#15
INSIDIOUS '86 Registered User Join Date: Jul 2009 Location: washington Posts: 4,178	Re: Really could use some help on this one! 70s trucks typically had 1/ bolts and 80s trucks got the corporate ten. __________________ 377 sbc thumpr cam autogear m23 muncie 3:73 Detroit trutrac 3''spintech prostreet mufflers xpipe 1 3/4 headers build thread !http://67-72chevytrucks.com/vboard/s...d.php?t=577217 Iroc gauge threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=554511

10-25-2013, 02:35 AM	#16
Billy81 Registered User Join Date: Jun 2004 Location: Medford,Oregon Posts: 390	Re: Really could use some help on this one! I think 81 was the last year for the 12 bolt in our trucks. __________________

10-26-2013, 03:04 AM	#17
andrewmp6 Registered User Join Date: Jan 2009 Location: Louisville,Ky Posts: 5,811	Re: Really could use some help on this one! 420hp but how much torque are you going to have?

10-26-2013, 07:55 AM	#18
Jonboy Slots go on anything! Join Date: May 2003 Location: Richardson, TX Posts: 5,957	Re: Really could use some help on this one! A 1/2 ton 4x4 rear 12 bolt will work as well; you just have to swap axle shafts. __________________ 1974 Jimmy- 5.3/4L80e/NP241



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10-26-2013, 08:02 AM	#19
Unca Registered User Join Date: Apr 2013 Location: Laporte, IN Posts: 57	Re: Really could use some help on this one! 10 bolts are cheap n easy to find. 12 bolt internals fit in them with a little work and are much stronger. The cracked housing is interesting, wheel hop? or speed impact? overloading shouldn't have cracked it that way. the arms, id go to the company you got them from the replacement part looks like its not going to fit, don't forget the 3/8 inch or so of bushing that also has to fit in the gap.

10-27-2013, 09:48 PM	#23
esbstuff Registered User Join Date: Jun 2011 Location: St Robert, Mo Posts: 730	Re: Really could use some help on this one! You need a girdle! (not your grandma's) Also I would use an older 12 bolt instead of the later one. I've never tore up an older one...

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