Poly Bush diff mounts

Discussion in 'General maintenance, upgrades and modifications' started by Ticker, Jul 31, 2019.

  1. 31 Jul 2019 at 2:41 PM #1
    Ticker

    Ticker Wearing official underwear

    Joined:
    Dec 29, 2011
    Messages:
    215
    Likes Received:
    4
    Trophy Points:
    18
    Location:
    Wooton, Isle of Wight
    Your Motor:
    2003 M3 E46
    Colour Combo:
    Silver with black interior
    Guys,

    Anyone know where I can buy an upgrade poly bushes for me diff

    Dave
     
  2. 31 Jul 2019 at 3:09 PM #2
    bimmermen

    bimmermen On the path

    Joined:
    Jun 5, 2018
    Messages:
    131
    Likes Received:
    10
    Trophy Points:
    18
    Your Motor:
    2003 m3
  3. 2 Aug 2019 at 9:49 PM #3
    klan8456

    klan8456 Achieved official socks

    Joined:
    Jan 27, 2018
    Messages:
    1,282
    Likes Received:
    235
    Trophy Points:
    63
    Your Motor:
    2003 BMW M3
    Not recommended unless it’s a dedicated race / track car.
     
  4. 2 Aug 2019 at 10:30 PM #4
    bimmermen

    bimmermen On the path

    Joined:
    Jun 5, 2018
    Messages:
    131
    Likes Received:
    10
    Trophy Points:
    18
    Your Motor:
    2003 m3
    klan explain why ??
     
  5. 3 Aug 2019 at 9:17 AM #5
    klan8456

    klan8456 Achieved official socks

    Joined:
    Jan 27, 2018
    Messages:
    1,282
    Likes Received:
    235
    Trophy Points:
    63
    Your Motor:
    2003 BMW M3
    General consensus is that they will clunk too much on a road car. Better off with new bushings (the entire rear cover) from BMW, and the revised bolts.
     
  6. 3 Aug 2019 at 11:04 AM #6
    Alex E46

    Alex E46 On the path

    Joined:
    Nov 27, 2017
    Messages:
    114
    Likes Received:
    16
    Trophy Points:
    18
    Location:
    Hertfordshire
    Your Motor:
    2004 M3
    Colour Combo:
    Titan Silver/Black
    Get OEM, when you get the part, you will see its a proper solid bit of kit anyway - I see no need to use a poly bush.
     
    m3rosco likes this.
  7. 3 Aug 2019 at 11:49 AM #7
    Nunga

    Nunga Achieved official socks

    Joined:
    Apr 5, 2015
    Messages:
    1,395
    Likes Received:
    262
    Trophy Points:
    83
    Location:
    Baden-Württemberg
    Your Motor:
    2003 E46 M3 manual
    Colour Combo:
    Mystic Blue/Laser Anthrazit Stoff
    OEM diff bushes were the recommendation to me too, and it made a massive difference replacing mine after 57,000 miles.
     
  8. 4 Aug 2019 at 7:03 AM #8
    DD M3

    DD M3 Wearing official underwear

    Joined:
    May 24, 2017
    Messages:
    213
    Likes Received:
    55
    Trophy Points:
    28
    Location:
    West Midlands
    Your Motor:
    2005 M3 E46
    Colour Combo:
    Silver grey
    OEM is best for road car, poly are noisy as hell.
    I have high quality AKG poly for my track car. Stay away from powerflex. I had one fail with only 2000 miles.
     
  9. 13 Aug 2019 at 11:14 AM #9
    Iain

    Iain Staff Member Moderator

    Joined:
    Apr 14, 2010
    Messages:
    4,026
    Likes Received:
    226
    Trophy Points:
    63
    Location:
    Isle of man
    Your Motor:
    AMG estate
    Poly diff mounts transmit huge amounts of noise, more than any other bush replacement on the car.

    Unless you are ok with that, don't do it.
     
  10. 13 Aug 2019 at 10:31 PM #10
    m3rosco

    m3rosco Achieved official socks

    Joined:
    Dec 28, 2008
    Messages:
    5,486
    Likes Received:
    316
    Trophy Points:
    83
    Location:
    Norfolk
    Your Motor:
    E46 M3 ESS VT2-525
    Colour Combo:
    PY
    As above, stock to oem!!
     
  11. 13 Aug 2019 at 10:35 PM #11
    alexlex85

    alexlex85 Achieved official socks

    Joined:
    Apr 30, 2011
    Messages:
    920
    Likes Received:
    117
    Trophy Points:
    43
    Location:
    Aldershot, Hampshire
    Your Motor:
    E46 M3 coupe manual. M3 EVO S54 coupe manual. E92 M3 DCT
    Colour Combo:
    Carbon black, Imola red. Atlantis Blue,Black extended leather.Alpine White, fox extended leather
    I have upgraded my e46 to polybushes and couldnt tell the difference in noise. That was sub frame and diff.
     
  12. 31 Aug 2019 at 5:55 PM #12
    mjn

    mjn On the path

    Joined:
    Aug 28, 2019
    Messages:
    121
    Likes Received:
    47
    Trophy Points:
    28
    Your Motor:
    2011 E90 335D
    Colour Combo:
    Azurite Black with Oyster Leather.
    I used poly bushes on my E46 for diff and subframe, and you could tell in the cabin. A bit more noise and vibration.
     
  13. 5 Sep 2019 at 11:29 PM #13
    Iain

    Iain Staff Member Moderator

    Joined:
    Apr 14, 2010
    Messages:
    4,026
    Likes Received:
    226
    Trophy Points:
    63
    Location:
    Isle of man
    Your Motor:
    AMG estate
    admittedly my e36 is fully stripped, but once changed i honestly thought the diff had failed though admittedly its a very very hard bushing so i dare say a softer one wont be as bad.
     
  14. 8 Sep 2019 at 9:06 AM #14
    monkeyboy

    monkeyboy Achieved official socks

    Joined:
    Nov 12, 2013
    Messages:
    2,069
    Likes Received:
    300
    Trophy Points:
    83
    Your Motor:
    2004 E46 M3 convertible, manual, Laguna Seca Blue
    Colour Combo:
    Laguna Seca blue paint with matching Laguna Seca blue leather
    I polybushed my diff when I had my RACP done. I went for poweflex purple ones and it has made absolutely zero difference to sound/clunck/noise or anything.
    If you went for the black race series I would expect that to be too firm for day to day use. They have a lifetime guarantee so go for it.
    I got mine through Ben @ Hack engineering.
     
    Last edited: Sep 11, 2019
  15. 11 Sep 2019 at 1:43 AM #15
    DD M3

    DD M3 Wearing official underwear

    Joined:
    May 24, 2017
    Messages:
    213
    Likes Received:
    55
    Trophy Points:
    28
    Location:
    West Midlands
    Your Motor:
    2005 M3 E46
    Colour Combo:
    Silver grey
    The noise from my diff is very bad due to 95a diff and subframe poly bushes and a mason engineering rear brace. The mason brace transmits the more vibration/whine into the rear strut towers which amplifies the noise.
     
  16. 11 Sep 2019 at 12:16 PM #16
    Iain

    Iain Staff Member Moderator

    Joined:
    Apr 14, 2010
    Messages:
    4,026
    Likes Received:
    226
    Trophy Points:
    63
    Location:
    Isle of man
    Your Motor:
    AMG estate
    Dude, mine is a track car, they are as hard as hard gets, way way harder than the powerflex offerings. howver I need to put this into context. when my gearbox mounts failed I bought a load of solid nylon rod, drilled through it and bolted the straight through it. I noticed a significant change in gear selection accuracy and virtually no difference in noise.

    When I changed the diff bushes, I noticed absolutely no improvement in any respect (these have been in for two years) and a very significant increase in noise. I do not see its worth the bother to be honest.
     
    monkeyboy likes this.
  17. 11 Sep 2019 at 12:56 PM #17
    monkeyboy

    monkeyboy Achieved official socks

    Joined:
    Nov 12, 2013
    Messages:
    2,069
    Likes Received:
    300
    Trophy Points:
    83
    Your Motor:
    2004 E46 M3 convertible, manual, Laguna Seca Blue
    Colour Combo:
    Laguna Seca blue paint with matching Laguna Seca blue leather
    I only did mine as was having the RACP plated so changed them only because while it's off it made sense and also made sense as they have life time guarantee that was the only reason. Most of the rest of the car has been done since and the only one I can say actually felt different was the lolly pop ones which made the front end much sharper.
     

Users Who Are Viewing This Thread (Users: 0, Guests: 1)

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice