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The weekend project is complete - rebuild the rear suspension

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    The weekend project is complete - rebuild the rear suspension

    The front suspension was completely overhauled shortly after I bought the car, including new rear shock mounts. I however, hadn't touched the rest of the suspension. Since it's been my goal to replace all the wear parts on this car, I've been collecting parts (very slowly) over the years and it's finally come down to getting it installed. After reading all the horror stories of stuck rear subframes, I did my best to prepare and get some extra hands to help.

    The parts:


    (some pictured, some not)
    -Powerflex poly bushings for the subframe and trailing arms
    -Goodridge stainless brake lines
    -ATE super blue
    -new rear rotors
    -Mintex redbox pads
    -Redline diff fluid
    -Wheel bearings

    First step was getting the car into the air and start removing the exhaust.



    Then the fun began.... the driverside axle was stuck... bad. Broke 2 pullers and no matter of hammering was getting it out of there. Moved to the other side and the axle removed as it should with a puller. Good to know it wasn't just my technique ;)

    I wanted to replace the bearings on the car since everything was nicely supported and using the bearing tool would be easy.. but it wasn't meant to be. So I pulled the subframe with axle:



    And after all the horrible stories of seized subframes, this one came right out, what a relief!


    We got to the task of removing the trailing arms and getting it set up on the press to remove the axle:



    But again, that axle was stuck... 12 tons of force, PB blaster and even heat did not work. It stayed stuck.

    Now I wish I had a video of this... but I'll do my best to describe it: We remove upper portion of the press to allow some room to swing a sledge (see where this is going?) Since it was nicely supported, we held one small sledge on the axle and I went at it with the big sledge. 3 hits later and it's free!

    Now one mistake I made was after the passenger side stub and bearing removed easily, I forgot about the C clip on the driver's side.. after some time wasted and frustration plus one mushroomed bearing puller plate, I found my error and the bearing came right out.

    Then it came to pressing out the bushings, easy with a press. They came out in one piece:



    Did a quick power wash of the subframe, put new diff fluid in and installed the Powerflex bushings.

    These went in with no problem. Just a rubber mallet to drive in the metal sleeves and it's ready to install.

    Here is a close up pic of how the bushings install since I couldn't find one when I was researching:



    And ready to go in:



    I've added a new diff seal to my to-do list for next time ;)

    And a shot of it all back together with the brake components:




    Now while the car is still in the air, I have to swap out the motor mounts and breather hose and she's back on the road :)
    Chris
    90 Corrado/91 M3/01 M5

    #2
    Excellent. I need to do exactly this to my car, it's one of the last suspension things that it needs, everything else has been done. I don't have access to a press, I'll have to have them pressed out, but did the whole thing take long? Afternoon job?

    Comment


      #3
      nice bbs's
      Originally posted by audiquattrot
      bimmers b4 b*tches....remember that.
      1990 Alpinweiss 325i - secret 500whp build
      2000 Audi S4 B5 Laser Red
      1990 Nissan 240sx - Drift Missile
      2006 CBR600RR

      Comment


        #4
        Josh- If you're just doing bushing it'd probably go much quicker, I have about 8 hours on saturday, and 6 on sunday. I'd say 3 or more of those was dealing with that damn driver's side axle...
        Chris
        90 Corrado/91 M3/01 M5

        Comment


          #5
          Love the garage floor..

          .. and that //M car has got to be a joy to work on.

          kudos
          -----Zen and the Art of e30 Maintenance - / - Zen TOC - / - Zen Summary

          Comment


            #6
            Lovely! I am tackling the sub and trailing bushings on my eta once the wagon is on the road. I only have 25k on the wheel bearings on the m3 arms. So I am lucky there!

            How much road noise do you get with those bushes? I was planning on going OE rubber as I have them on the shelf.

            And finally, congrats on the subframe coming out without a hitch! :)
            sigpic

            Comment


              #7
              I'm kinda disappointed in my power flex bushings.. I've had them in for about 2 years and they have all cracked (the control arms have started small splits within 6 months).

              We installed them right and I double checked with power flex to make sure I didn't do anything screwy. But, I still have small/ slight cracks in them all.

              Comment


                #8
                I have all the stuff to do this as well, just not looking forward to the install.
                sigpic

                Comment


                  #9
                  Weird, I have the same bushings and mine are in great shape (5 years old now). The do squeak though, so get ready for that. Other than that I love them.

                  Did you weld the A arms as well?

                  Don't forget these
                  Yours truly,
                  Rich
                  sigpic
                  Originally posted by Rigmaster
                  you kids get off my lawn.....

                  Comment


                    #10
                    I'm prepared for some squeeking, I'm used to it with the Treehouse CABs ;) I have yet to drive it though..

                    No welding of the trailing arm. That may be an addition down the road. I still need to strengthen the sway bar points front and rear with the weld in plates before I upsize the bars. May do it all at once.

                    As for the Poly cracking, I hope that is an isolated incident.
                    Chris
                    90 Corrado/91 M3/01 M5

                    Comment


                      #11
                      Delta, a little more info on that bracing you did on the trailing arms, if you would?

                      Comment


                        #12
                        The 'A' brace on those arms just stiffens them up so they dont twist etc. The M-coupe arms come factory with them welded in. I have a set, who wants them?! :)
                        sigpic

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