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auburn diff clutches???
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clay
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1972 Chevrolet Nova

PostPosted: Thu Dec 06, 2007 2:29 pm    Post subject: Reply with quote

Actually all you would have to setup is to duplicate whatever backlash is present now - the pinion depth remains untouched and installed as is. That might help - however you would still have to get bearings removed and reinstalled or just buy new ones. Buying new ones would probably be a wash since you could put them on yourself instead of having to pay someone to remove the old ones. You can buy a cheap dail indicator / magnetic base kit from someone like MSC tool supply or maybe even Harbor Freight tools and do the entire thing yourself. We could walk you through it step by step if that would help too. Clay
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projekt70chevelle
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PostPosted: Thu Dec 06, 2007 5:44 pm    Post subject: Reply with quote

I've done a gear job on a dana 44 and a 9" and I can locate everything I need (friend of a friend deals) and they've both had perfect wear patterns, after a few attempts anyway. But I'm sure I'll ask for some pointers when I go to do my 12 bolt. Also though from my understanding there is always a chance for a slight difference in the castings of the diff and with my luck I will get the one that does.

But either way the car will remain lsd/peg leg for the rest of the winter till I can build up savings once again. But thanks for all the input and saving me from wasting $110 on a service kit that doesn't replace all the wearing items
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10sec.et
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1969 Oldsmobile Cutlass

PostPosted: Thu Dec 06, 2007 10:49 pm    Post subject: Reply with quote

start checking ebay. racing season has ended for most (unless youre in Texas Twisted Evil ) so lots of stuff will be up for sale at decent prices. some of it only one season of use.
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af2 wrote:
It seems we can look at our magical Balls and come up with a fix?

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clay
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1972 Chevrolet Nova

PostPosted: Fri Dec 07, 2007 12:52 am    Post subject: Reply with quote

Didn't know you had already done a few. Even though you haven't done a Chevy style, you'll be able to handle it. Slight differences from the one's you have done, but nothing that you haven't seen before. Shouldn't be any problem with the casting of the carrier since pinion depth is defined as the distance from end of pinion to the center line of the axle / carrier bearing. This center line can't change, it always has to rotate about the same point so pinion depth has to stay the same. The flange for the ring gear is probably going to be in a slightly different place and that is where the shimming (which you will find a PIA compared to the 9" - don't know about a Dana - haven't done one of those yet) and setting backlash come in. Clay
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squeeezer
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1991 Chevrolet Camaro

PostPosted: Fri Dec 07, 2007 7:52 am    Post subject: Reply with quote

this winter i have a borg warner rear end to re-build
i wish i had all these options .....for diffies
my only option is cone ,cone or........cone Laughing

i can locate rebuild kits (so ive heard) gonna take time though
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Big Dave
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PostPosted: Fri Dec 07, 2007 7:24 pm    Post subject: Reply with quote

clay wrote:
Didn't know you had already done a few. Even though you haven't done a Chevy style, you'll be able to handle it. Slight differences from the one's you have done, but nothing that you haven't seen before. Shouldn't be any problem with the casting of the carrier since pinion depth is defined as the distance from end of pinion to the center line of the axle / carrier bearing. This center line can't change, it always has to rotate about the same point so pinion depth has to stay the same. The flange for the ring gear is probably going to be in a slightly different place and that is where the shimming (which you will find a PIA compared to the 9" - don't know about a Dana - haven't done one of those yet) and setting backlash come in. Clay


Spicer (GM 10, and 12 bolt) and Dana (30, 44, 50, 60) are the same company. The Dana 60 is just a 12 bolt on steroids. They set up the exact same way.
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squeeezer
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1991 Chevrolet Camaro

PostPosted: Fri Dec 07, 2007 11:40 pm    Post subject: Reply with quote

strange engineering now makes a rear end that is a homoligation of a 12 bolt and dana 60 called the s60

dana 60 innards with 12 bolt archetecture

dont know how much they cost but they are said to be as strong as the 9 inch
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af2
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1933 Willys Coupe

PostPosted: Fri Dec 07, 2007 11:51 pm    Post subject: Reply with quote

squeeezer wrote:
strange engineering now makes a rear end that is a homoligation of a 12 bolt and dana 60 called the s60

dana 60 innards with 12 bolt archetecture

dont know how much they cost but they are said to be as strong as the 9 inch


The funny thing is: a 60 is the strongest of all? And very cheap to build compared ? Yes amazing. So many people get stuck on the nine it's not funny!

Talk about weight! A 9" supported is mabey 18 lbs lighter. Unsprung weight? I will take a strong one period! Laughing
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squeeezer
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1991 Chevrolet Camaro

PostPosted: Sat Dec 08, 2007 7:56 am    Post subject: Reply with quote

lets not forget the 8 3/4 chrysler if you can find one
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af2
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1933 Willys Coupe

PostPosted: Sat Dec 08, 2007 7:13 pm    Post subject: Reply with quote

squeeezer wrote:
lets not forget the 8 3/4 chrysler if you can find one


That was my first piece of rear! Shocked They are great! Laughing
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10sec.et
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1969 Oldsmobile Cutlass

PostPosted: Sun Dec 09, 2007 1:58 am    Post subject: Reply with quote

af2 wrote:
squeeezer wrote:
lets not forget the 8 3/4 chrysler if you can find one


That was my first piece of rear! Shocked They are great! Laughing


just give er a 9" and ya wont have any problems Wink

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Knarley Darley
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PostPosted: Sun Dec 09, 2007 2:19 pm    Post subject: Reply with quote

I dont even need to talk because 10 sec says everything for meLOL. So ditto what he said about the 9er. As a matter of fact I have an 8& 3/4 rear in my race car and I have broken it twice. I tried street gears in it once and they broke on the first hit. Pro gears last about 30 runs and then the teeth start breaking off. If you are only changing the carrier in your 12 bolt it will be pretty easy because you dont have to mess with the pinion at all, just the side to side shims like Clay said to get the proper lash.
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projekt70chevelle
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PostPosted: Tue Dec 11, 2007 8:05 pm    Post subject: Reply with quote

Well keep me in mind when you're checking ebay encase I miss one!

Thanks
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af2
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1933 Willys Coupe

PostPosted: Tue Dec 11, 2007 8:21 pm    Post subject: Reply with quote

[quote="Knarley Darley"]I dont even need to talk because 10 sec says everything for meLOL. So ditto what he said about the 9er. As a matter of fact I have an 8& 3/4 rear in my race car and I have broken it twice. I tried street gears in it once and they broke on the first hit. Pro gears last about 30 runs and then the teeth start breaking off
quote]
30 spline axles? Shocked What were you thinking? Very Happy Street gears? I know as I have been there! Crying or Very sad
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