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Thread: Differential mounting fasteners in Coupe 65 IRS

  1. #1
    Junior Member
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    Differential mounting fasteners in Coupe 65 IRS

    For my project, I have received the IRS for my Coupe 65 from FFR.
    In the manual, it talks about the "smaller/Shorter bolts" and the larger/longer bolts", but what are these fasteners?
    I don't have any prepackaged nuts and bolts with my new differential from FFR.
    Are there part numbers? Description of the fasteners?

    Chris Nicholls
    Sales Order's 201690
    206599

  2. #2
    Junior Member
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    Also, while I am at it...
    Though I received a box of IRS fasteners, and as I am assembling the toe adjustment arms, I can't find either of these
    HHBOLT 0.6250 - 11 x 2.5 x 1.25 - N (2)
    B18.2.3.4M - Hex flange screws, M14 x 2.0 x 80 - 34N (2)

    FFR says they have now delivered everything. There are some similar bolts in there, but definitely not these.
    I do have a local bolt shop that seems to have everything. Is the above information enough for them?
    Are they graded bolts?

    Chris

  3. #3
    Senior Member edwardb's Avatar
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    See if information in this thread helps. Several Factory Five responses: https://thefactoryfiveforum.com/show...n-Coupe-65-IRS

    FYI, Factory Five doesn't actively monitor here in case that's what you're thinking.
    Build 1: Mk3 Roadster #5125. Sold 11/08/2014. Build 2: Mk4 Roadster #7750. Sold 04/10/2017. Build Thread
    Build 3: Mk4 Roadster 20th Anniversary #8674. Sold 09/07/2020. Build Thread and Video. Build 4: Gen 3 Type 65 Coupe #59. Gen 3 Coyote. Legal 03/04/2020. Build Thread and Video
    Build 5: 35 Hot Rod Truck #138. LS3 and 4L65E auto. Rcvd 01/05/2021. Legal 04/20/2023. Build Thread. Sold 11/9/2023.

  4. #4
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    Chris,

    I found this as I prepare to swap my differential.

    Maybe this will help.

    http://www.factoryfive.com/wp-conten...s-packlist.pdf

    Dave
    Gen III #17
    20,000+ miles

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