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Thread: Difference between GM 8.5 10 bolt metric and standard bolt

  1. #1
    Join Date
    Mar 2008
    Location
    hampton bays NEW YORK
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    91

    Difference between GM 8.5 10 bolt metric and standard bolt

    I want to order a rear end cover but I'm told that my truck has metric bolts and won't work because it doesnt use standard bolts. They didn't explain the reason Im hoping one of you guys can

  2. #2
    Join Date
    Mar 2008
    Location
    hampton bays NEW YORK
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    91
    Anyone?

  3. #3
    Join Date
    Jul 2008
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    Racoon Twp., PA
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    1,572
    A cover is a cover. You are wanting to replace teh bolts as well you mean and the bolts that come with the cover won't work?
    2013 CC 5.3
    81 C10 LS1 project

  4. #4
    Join Date
    Mar 2010
    Location
    Tuscaloosa, AL
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    256
    A cover is just a piece of metal, it doesnt care what type of bolt goes through it.

    I dont know about the 10b, but on the OBS 14b the diff bolts are 8x1.25x18mm

  5. #5
    Join Date
    Mar 2008
    Location
    hampton bays NEW YORK
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    91
    If it doesn't matter then why does trick flow specifically say that their 8.5. Ten bolt cover will not work on rears with metric bolts

  6. #6
    Join Date
    Mar 2010
    Location
    Tuscaloosa, AL
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    256
    I found a listing for the 10b bolts as 5/16 -18

    which (5/16)*25.4 = 7.9375mm

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