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Old 01-07-2006, 09:14 PM
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Rear Housing Identification

Hi guys.
Maybe someone can help me with this problem. I recently bought a street rod 53 Buick Riviera Custom that has been fully customized. I am trying to identify what the rear is they have installed in this car. It was built several years ago and has passed through a few owners. There is NO tag on it, but it is a 10 bolt that opens from the back (Cover). The only markings on the cast are GM56 in large digits, and on the other side of the yoke is the numbers 38948591. These are raised casting numbers not stamped. The rear is NOT a posi.

I am trying to hopefully identify what it may have come out of so I know what rear brakes to order etc when needed. These numbers are viewed while the car is on the lift and you are standing UNDER the driveshaft and looking back at the rear. The GM56 is on the left side below the pumpkin and the 38948591 is on the right. Next thing I have to I.D. is the sled they put under the front end!.....
Does anyone out there have a book they can check for me. Greatly appreciated. Thanks in advance!
G-

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Old 01-09-2006, 01:00 AM
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I think 3894859 is an 8.2" 10-bolt housing. If it's a leaf-spring rear, it's probably from a '64-'71 Nova or '67-'69 Camaro. Most of those cars used the same rear brakes, but take one side apart & take the parts to the parts store so they can match them up, just to be sure. Leave the other side intact in case you forget how they went together.
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Old 01-09-2006, 08:26 AM
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Rear Housing I.D.

Thanks for the info. This IS a leaf spring rear. Havent checked the measurement yet. But that certainly is a good start. My buddy and I had guessed it looked like it was from a late 60's Camaro but werent' t sure. I know the car was said to have been built in the late 60's, but I wasnt sure if the rear had been changed out since.

Thanks again Jim!!
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Old 01-09-2006, 10:56 AM
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Will this help? http://www.oldsmobility.com/10bolt-tech.htm
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Old 01-09-2006, 03:27 PM
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identification.

get an abrasive pad or a wire brush and scrub the front face of the passenger side axle tube (around the middle between the diff and the leaf springs) there should be a stamped number an example would be my 71 camaro rear end had "GZ G049 1"

GZ=2.73:1
G=detroit gear and axle
049= sequential day of the year (in this case Feb 18th)
1= day shift (2 would indicate night shift)
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Old 01-09-2006, 03:48 PM
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Rear Housing Info

Thanks for the info! I will check it out in the next couple of days.
I appreciate it.

Glen
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Old 01-10-2006, 02:16 AM
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http://novaresource.org/axle.htm has a chart showing end-to-end length of Nova rear ends, and a list of axle codes that may apply to yours if it's a Nova or early Camaro rear.
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