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What size axles in a 1500 and 2500?

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1500 series truck use the 8.6" 10 bolt

1500Hd (former 2500) use the 9.5" semi-floating 14 bolt

2500Hd trucks use the 10.5" full floating 14 bolt on trucks with the 6.0 engine, while big block 8.1 and duramax diesel trucks use the big 11.5" rear end.

3500 trucks all use the 11.5" rear end.


hope this helps.

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