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  1. #1

    Default Front differential interchange question

    does anybody know if i can put a NNBS (2007-present) front differential assembly in a nbs (2004 to be exact). I need to replace my carrier bearings and just want to have the shortest downtime and really not interested in rebuilding it. I found a NNBS front diff assembly with 24 miles on it for $500. so i need to know if the whole assembly case and all is interchangeable. Thanks in advance.

  2. #2


    I don't know if they are interchangeable, but before you go too far, make sure the gear ratio is the same for both diffs.

    '09 Avalanche LTZ - Black
    '05 Envoy XL (sold)

  3. #3


    i have checked that. the gear ratio is the same

  4. #4
    Sr. Engineer
    Join Date
    Oct 2010
    Indianapolis, In


    I can't tell you but the local salvage yard may be able to. The Pick-A-Part here in Indy gave me a list of all the different years and models that had the same axle I was looking for the last time I went looking. I have not been so successful in getting any of them to share their interchange info without paying.
    2000 GMC YUKON SLT, 5.3L tow pkg, G80 rear/w 3.73 gear

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