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Old 09-24-2021, 03:46 PM   #2
hatzie
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Join Date: Oct 2008
Location: Wentworth, NH
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Re: 2004 GMC 3500 rear end size question

Won't be a 9.5 in a 3500 You can tell right away if you have one of these by looking. The other two axles are full floating so the hubs extend out from the wheel with the bolts holding in the axle shaft. The 9.5 is a C Clip axle like the 10 bolt and 12bolt.

LQ4 gasoline will have the 10.5

The dirtymax will have the 11.5

Not sure about the 8.1L They came with the Allison so it might have an 11.5 out back.
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2000 GMC C2500, TD6.5L, NV4500
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And please let us know if and how your repairs were successful.
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