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Old 07-11-2009, 06:02 PM
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Brake drum sizes on Chevrolet dually

Howdy!, Been to knowlefge base, and all over the web. Are there more than one size rear drums used on Chevrolet duallys? I bought a 1988 Chev 1 ton dually. However it did not have "BUD" wheels on it. It came with single 1 ton wheels. I bought used (KNOWN CHEV) dually "BUD" rims. However the rim will not fit over the brake hub. The rear end is a 14 bolt.

Thank you for taking a look. Please advise.

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Last edited by slider in wa; 07-12-2009 at 09:19 PM. Reason: mistakes
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Old 07-16-2009, 02:29 AM
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yes there were a couple sizes of 10.5" corp 14 bolt axle brakes
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Old 07-16-2009, 12:28 PM
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Originally Posted by slider in wa
Howdy!, Been to knowlefge base, and all over the web. Are there more than one size rear drums used on Chevrolet duallys? I bought a 1988 Chev 1 ton dually. However it did not have "BUD" wheels on it. It came with single 1 ton wheels. I bought used (KNOWN CHEV) dually "BUD" rims. However the rim will not fit over the brake hub. The rear end is a 14 bolt.

Thank you for taking a look. Please advise.
I responded to one of your other posts, so I'll try again here.

All 1974-2000 C/K and R/V 30/3500 dually trucks came with the same size drums - 13 x 3.5" There is only one part number drum listed for these model years. This is the JB8 (DRW) brake option.

Is this REALLY a dually axle? Your post is confusing. Single wheel axles used differently shaped drums and backing plates. Dually wheels will not clear single wheel brakes. Have you tried putting steel dually wheels on this axle?
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Old 07-18-2009, 12:45 PM
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Brake drum sizes

I want to thank all of you for you help. I now know what to look for. (Kinda) I now think you are right and this may not be a dually rear end. However, i do not understand why the stock wheels do not cover the brake drums. Any way the drums that are on the truck have fins cast into them. Please explain how i would correctly measure the drums?
I have purchased a dually rear end, Corporate 14 bolt.(3:73 gears). But i have some concerns over it as well. It is a very narrow rear end. I am not sure it will fit under the frame. Any advice is sure welcome.
Thanks again fella's.
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Old 07-18-2009, 03:49 PM
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silly me

It is a Dana 70 rear end. Now can you tell me if they would take a different size "BUD" rim? Thanks
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Old 07-19-2009, 10:06 PM
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Originally Posted by slider in wa
It is a Dana 70 rear end. Now can you tell me if they would take a different size "BUD" rim? Thanks
All 1974-2000 Chevy/GMC one ton duallies with the eight lug wheels use the same brake drums, same wheel bearings, and likely the same hubs. This goes for both the Corporate 14 bolt and the Dana 70 -same drums.
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