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upgrade 2.8 diff

  1. 06 CTS 2.8 Auto stock Diff.. Can I swap out to a 06 3.7 CTS-V Diff

    Cadillac CTS First Generation Forum - 2003 - 2007
    So im having to pull the rear diff and get a used replacement from a yard somewhere. I would like to know if its possiable to get a better geared diff from a V? Would it cause issues having a different ratio or other? If so, Is there any other CTS year Diff that would just swap out, and is...
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