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Thread: 904 LSD open heart surgery

  1. 12-25-2021, 07:12 AM #41
    gled49
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    I’ve rebuilt many diffs and can’t accept the asymmetrical wear marks as machined. There is no reason for the pressure rings to move inside the housing.
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  2. 01-03-2022, 11:25 AM #42
    68S_SK2
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    All my early style 904 LSD's have KAMAX screws. The later style has FBA screws.
    I opened up the NOS later style 904 with the bigger eyelet: The interior is the same in both styles, only the eyelet position has moved. It is in between the differential axles lines now.

    Name: 20220103_LSDalt_neu1.jpg Views: 113 Size: 97.9 KB
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  3. 01-03-2022, 12:05 PM #43
    Sixtyseven911
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    Another good resource stateside for these types of questions is Tom Conway out in Boulder Colorado. Carquip is the company name
    ESR # 3177
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  4. 01-03-2022, 04:31 PM #44
    Jon B
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    Quote Originally Posted by Jon B View Post
    The lack of visible "axles" in one might be a slight re-design, in later versions, to decrease the "eyelet" blockage.
    Yes, I think the eyelets were enlarged and re-positioned to improve the oil flow through the differential.
    Thanks for opening it to document the difference.

    Jon B.
    Vista, CA
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