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    Urethane diff mount bushing

    There is a lot of different opinions going about R3V discussing the urethane diff mount bushing. I got a 89K M3 diff and the cover and bushing look great. Nando was advising people against the urethane diff bushing in some threads I search and found, as well as others.

    Trent said if I was going urethane around the back, I would want to upgrade the diff bushing as well.....but he's the only one.



    Hmmmmmm.

    #2
    I would get the OEM M roadster bushing. Its rubber, but a much improved design.
    Tenured Automotive Service Professional - Avid BMW Enthusiast

    Vapor Honing & E30 ABS Pump Refurbishment Service
    https://mtechniqueabs.com/

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      #3
      yeah, well too late now for that.

      I'm trying to think whether to use this urethane bushing, or just run the stock one. In a lot of threads I found Nando had told people to pass on the diff urethane bushing, and Beej said his stock one was fine.

      So either I'm installing this in a couple days, or running the stock, and returning/selling this one.

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        #4
        KISS
        BEERTECH

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          #5
          yeah, fuck it. No sense ripping out that pretty low mileage and pretty nice bushing and installing the urethane one just because one person said I should. I'll return or sell the RTRS bushing......and if it is a problem install it later.

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            #6
            Umm...that is the M Coupe bushing in that cover. Don't even bother with the urethane one.

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              #7
              Originally posted by bmwguru007
              Umm...that is the M Coupe bushing in that cover. Don't even bother with the urethane one.
              Indeed... I didn't even look.
              Tenured Automotive Service Professional - Avid BMW Enthusiast

              Vapor Honing & E30 ABS Pump Refurbishment Service
              https://mtechniqueabs.com/

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                #8
                Stock bushings flex too much. Use something more solid if you want to be a hero, but it isn't necessary. :)

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                  #9
                  I have the urethane diff bushing, it doesn't make my car faster though.
                  Build thread

                  Bimmerlabs

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                    #10
                    Replaced my trashed E30 bushing with an Mcoupe bushing... awesome awesome difference. 15yr old rubber with that sort of mileage tends to be pretty worn

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                      #11
                      so the mcoupe bushing will press right into the standard diff? i hadn't heard that before.

                      my diff bushing is wasted and i've been planning on going w/ the full mcoupe cover, but i might just press the mcoupe bushing in

                      learn something new everyday
                      James
                      '88 M3

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                        #12
                        yeah, I'm going to use the M coupe bushing of course. so that leaves me to sell or return the urethane one.

                        ^^ you interested?

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                          #13
                          How much for the urethane bushing? I'm hopefully switching out my diff pretty soon.

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                            #14
                            $50 bucks shipped? say a few dollars. even with the restocking fee, I might has well just return it if it is much less than that.

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                              #15
                              How much is the M coupe one? I think I'll prob just go with it, too.

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