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Thread: e34 differential

  1. #1
    Join Date
    Jun 2004
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    Bay Area, CA
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    Default e34 differential

    hi.
    Well, since my differential needs new seals, gaskets, and probly other little stuff i was wondering how much it would cost to buy a new/used differential.
    1. where could i look to find new or used e34 differentials (open and/or limited slip)?
    2. how much would it cost?
    3. what ratio would you get?


    TIA


    oh yea, car is an automatic, so right now i have a 4.10 open differential. was quoted $330 for 2 seals and gasket insall.

    www.KaRealtySF.com
    Build Date: 05-1995 /Engine: m50tu /Automatic Transmission /ABS /NO ASC /Open Differential /EAT Chip

  2. #2
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    Jan 2004
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    Elm Grove Farm, NC
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    Default

    http://www.bmwe34.net/e34main/upgrade/Recipe.htm


    click above link, then scroll down the page for some recommended diff ratio "upgrades", though if you have a 4.10 right now, moving up 1 level would be a 4.27 which can be hard to find.

    BTW- what car do you have?? (525/535/530 all use the same type diff, 540/M5 use a different type)....

    I've got a couple different ratios available, both LSD and open. Let me know what you want to do and I'll see if I can help.

    Thanks!

    Bret

  3. #3
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    Default

    hmm, thats weird. it says i have a 3.23. i was thought i had a 4.10. what ratio would be the best for a 95 525i automatic?

    www.KaRealtySF.com
    Build Date: 05-1995 /Engine: m50tu /Automatic Transmission /ABS /NO ASC /Open Differential /EAT Chip

  4. #4
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    Default

    It's sort of impossible to answer the question about the "best" ratio for your car. Since you probably have a 3.23 ratio, I would not go TOO far up (or down) from there, unless you have a specific reason to do so. I would think you could go for a 3.46 or a 3.64 and not have any negative effects.

    Bret.

  5. #5
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    Default

    well,i just want a little more acceleration, but i dont want to sacrafice too much mpg.
    i still dont know where to start looking on buying the differential. i am getting mixed info on what i have already. supposedly the canadian e34's came with 4.27lsd. which leads me to think i have a 4.10 not the said 3.23.


    does anybody know anywhere to find some differentials??

    www.KaRealtySF.com
    Build Date: 05-1995 /Engine: m50tu /Automatic Transmission /ABS /NO ASC /Open Differential /EAT Chip

  6. #6
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    Elm Grove Farm, NC
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    Default

    First, you need to confirm which diff you have in there now- that's should not be too hard as there's a metal tag on the rear cover with the ratio- if you have a 3.23 it will have "323" plus some other numbers/letters on it, if you have a 3.23 Limited slip is will say "S 323" plus the other stuff.

    I have a couple of diffs that will work for you, some open, some limited slip- you just need to decide what you want to install!

    Thanks, Bret.

  7. #7
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    Default

    hehe, yeah, i know. ill crawl under soon. i also need to know how much a new/used differential is! hehe.


    thanks for all your help so far rigmaster.

    www.KaRealtySF.com
    Build Date: 05-1995 /Engine: m50tu /Automatic Transmission /ABS /NO ASC /Open Differential /EAT Chip

  8. #8
    Join Date
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    4,150

    Default This might help















    Quote Originally Posted by liquidtiger720
    hehe, yeah, i know. ill crawl under soon. i also need to know how much a new/used differential is! hehe.


    thanks for all your help so far rigmaster.

  9. #9
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    Default

    Nice chart Bill, THANKS!!

    Liquidtiger- I can sell you a used E34/E32 LSD in a couple different ratios for $300 + shipping, or a used OPEN diff in a couple of different ratios for $225 + shipping.

    "NEW" diffs will be ~$2k or so, www.diffsonline.com sells rebuilt diffs for ~$1600-1800.

    Let me know once you find out what ratio you currently have, and I'll see what I have that would work for you.

    Thanks!

    Bret.

  10. #10
    Join Date
    Jan 2004
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    Default Bret, I thought you already had them, i posted them a

    while back. Here's the rest of them.








    Quote Originally Posted by Rigmaster
    Nice chart Bill, THANKS!!

    Liquidtiger- I can sell you a used E34/E32 LSD in a couple different ratios for $300 + shipping, or a used OPEN diff in a couple of different ratios for $225 + shipping.

    "NEW" diffs will be ~$2k or so, www.diffsonline.com sells rebuilt diffs for ~$1600-1800.

    Let me know once you find out what ratio you currently have, and I'll see what I have that would work for you.

    Thanks!

    Bret.

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