Differential Output Flange Sizes - Variations?

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  • Panici
    Moderator
    • Dec 2009
    • 2316

    #1

    Differential Output Flange Sizes - Variations?

    Looking back through my pictures, I had both my 2.93 LSD and 3.73 LSD sitting on the bench.

    I noticed that the output flange thickness is different!
    All of the pictures I've seen online have the thicker flanges of the 3.73 diff (right in picture).


    I measured both differentials and the horizontal width face-to-face is the same. I've had both installed in the car with no apparent difference.


    Has anyone seen this before? Should I be swapping to the thicker flanges in my 2.93 diff for strength? (If it's even a direct swap?)

    As a side note, the areas around the bolt holes are thicker (on the thin flanged unit) then the rest of the flange. You can see it in the second picture.


    Click image for larger version  Name:	52338670168_dd0ceaf979_b.jpg Views:	0 Size:	195.1 KB ID:	10084117


    '87 BMW E30 325is Turbo

    '99 BMW E36 M3 - - - '98 BMW E36 328i
  • packratbimmer
    E30 Fanatic
    • Dec 2009
    • 1329

    #2
    No need to swap out especially if you are not wanting to do seals.

    Comment

    • Panici
      Moderator
      • Dec 2009
      • 2316

      #3
      Originally posted by packratbimmer
      No need to swap out especially if you are not wanting to do seals.
      Have already done seals on both diffs, so would rather not swap unless it's needed.

      '87 BMW E30 325is Turbo

      '99 BMW E36 M3 - - - '98 BMW E36 328i

      Comment

      • Panici
        Moderator
        • Dec 2009
        • 2316

        #4
        Thought about this again today after reading another thread on diffs.

        Can anyone comment further on the flange thickness differences?

        '87 BMW E30 325is Turbo

        '99 BMW E36 M3 - - - '98 BMW E36 328i

        Comment

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