Diff bushes without rear cover?

Discussion in 'E46 M3 (2001-2006)' started by SmokeyBear, Feb 13, 2020.

  1. 13 Feb 2020 at 7:46 AM #1
    SmokeyBear

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    Does anybody know if it’s possible to buy diff bushes separate to the diff cover?

    I thought I read somewhere that m3 evo bushes fit but I couldn’t find a part number.

    I don’t particularly want to fit poly bushes after hearing that they can cause extra noise.

    Thanks
     
  2. 13 Feb 2020 at 8:20 AM #2
    R60BBA

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    You’re correct, you cannot buy rear OE diff bushes separately as they come included with the rear diff cover.

    If you only want to change the bushes then you will have to go aftermarket. But as also you correctly pointed out, poly diff bushes increase NVH.

    I have no idea if M3 Evo bushes fit, but when I do mine I’ll be ordering a new diff cover with bushes from the dealer.
     
  3. 13 Feb 2020 at 11:02 AM #3
    harrypevo

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    You can't buy evo bushes separately anyway, only pre installed into a boomerang shape bracket which bolts to the back of the diff.
     
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  4. 14 Feb 2020 at 1:37 AM #4
    SmokeyBear

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    That boomerang is quite cheap. Ordered one and will whip the bushes out of that.
     
  5. 14 Feb 2020 at 7:12 AM #5
    AshE46M3

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    Just dont go polybush.
     
  6. 14 Feb 2020 at 10:03 AM #6
    AC427

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    You can make bushes out of Delrin rod.

    The bushes in the diff cover will take some persuasion to shift
     
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  7. 14 Feb 2020 at 10:59 AM #7
    SmokeyBear

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    I don’t want to use anything except rubber bushes. I’m sure I’ll be able to remove the ones in the cover. I’ve dealt with worse.
     
  8. 14 Feb 2020 at 11:01 AM #8
    AC427

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    No worries. Are the Evo bushes a bit firmer than the E46 M3 diff end cover ones?
     
  9. 14 Feb 2020 at 11:11 AM #9
    SmokeyBear

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    No but the boomerang is much cheaper than the e46 cover. I don’t like paying needless M taxes so I’ll take the cheaper option here. Will let you know how I get on anyway.
     
  10. 14 Feb 2020 at 11:48 AM #10
    AC427

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    Thanks, good luck with it
     
  11. 14 Feb 2020 at 5:57 PM #11
    Gstlund

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    You can use the bushes from M3E36, 33 17 1 134 872. I've done it.
     
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  12. 18 Feb 2020 at 1:15 AM #12
    SmokeyBear

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    Thanks Gstlund

    Fitted them this evening.
     
  13. 18 Feb 2020 at 9:04 AM #13
    AC427

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    Were the old ones a bastard to get out?
     
  14. 18 Feb 2020 at 11:16 AM #14
    SmokyMo

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    Did you fit these 33171134872 ?
     
  15. 18 Feb 2020 at 1:55 PM #15
    SmokeyBear

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    yes smoky mo.....here’s a post I did on backroads for it


    Managed to fit the bushes to the diff cover last night.



    The bushes aren’t listed separately to the cover so BMW don’t want you to replace them independent to the cover probably due to the difficulty of doing so without damaging the aluminium cover.



    Using part number 33 17 1 134 872 which is a genuine part available at the dealer for other applications it’s possible to push the old bush out and push in a new one.



    [​IMG]



    I used a combination of an e36 rear ball joint and e39 rear ball joint tool to push the old one out and the new one in.



    [​IMG]



    I needed to use the gun because the diff kept twisting using a spanner and the cups had to be removed to fit the balljoint tools. You need to be very careful to not put any pressure on the aluminium because it’s very thin and it will crack.



    [​IMG]
     
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  16. 18 Feb 2020 at 5:39 PM #16
    IanB

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    Just looked up backroads, had never heard of it before, looks like interesting forum to read about peoples car projects.
     
  17. 18 Feb 2020 at 5:48 PM #17
    R60BBA

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    Good work there man.

    When I do mine I’ll probably get a new diff cover but for those on a tight budget, replacing their E46 M3 diff bushes with E36 M3 diff bushes could save them circa £90.

    • 33112282482 - E46 M3 diff cover with bushes - £140.
    • 33171134872 x2 - E36 M3 diff bushes - £50.
     
  18. 18 Feb 2020 at 6:10 PM #18
    Chady

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    Good find ,, I’ve actually ordered a set from auto doc. Should arrive any day now ,,,but I’ve had it on good advice that they aren’t quite the same. Ok they fit the 46 cover,, but also not advisable to refit new bushes in alloy,, but great find ,, I’m very curious to see the bushes when the arrive
     
  19. 18 Feb 2020 at 7:01 PM #19
    IanB

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    £90 in BMWs pocket vs £90 in my pocket, I know which I would choose.

    What's the problem replacing the ones in alloy if you are careful? The front control arm bushes are in alloy and replaceable.
     
  20. 18 Feb 2020 at 9:55 PM #20
    Chady

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    Going off what I’m told ,, front arm bush is to be replaced only one time then throughout,, as previously post ,diff cases apparently not advisable,, but as above I’ve ordered a set out of curiosity,:think:
     

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