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DIY - Rear Trailing Arm Bushings

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    DIY - Rear Trailing Arm Bushings

    I was dissapointed to not find a rear TAB DIY on here so I decided to take some pics and do one myself. This is basically as described from the Bently. I would suggest reading all the way through this before attempting the job, just because you might want to do the steps a bit differently.

    1. Jack up rear of car on jack stands, remove wheels


    2. Remove brake calipers and caliper brackets, rotor, and emergency brake parts, essentially gutting the brakes.


    3. Next its time to remove the half shaft. Undo the 6 socket cap screws that mount the inner CV joint to the diff. Lower it a bit and then wire it up so you dont put the CV's at a funny angle. DONT leave it in line with the diff, it needs to hang lower so it can move towards the middle of the car without hitting anything when you go to press the outside off (ask me how I know). Using a screwdriver and a hammer knock and pry the axle nut lockplate off. Mine was pretty rust and took some time but stick with it and it'll come off. I then used an impact with a 30MM socket to loosen the axlenut. If you dont have an impact you'll want to bust this nut loose before you raise the car since it's on there pretty tight. Press out the splined half shaft from the hub. I used a 2 jaw puller and it came out pretty easy. Now the half shaft is free to remove.




    4. Disconnect ABS sensor, shock, swaybar, brake lines between the body/TA and TA/caliper, and parking brake cable. My parking brake cable was sized pretty bad and took some work to break loose, but it just pulls out. Remove the spring.



    5. At this point basically everything should be removed from the trailing arm, and the only thing holding it should be the mounting bolts. To get the passenger side outer bolt off you'll need to disconnect the fuel filler hose at the gas tank. Remove the other bolt and the arm should come loose.



    6. When you get the TA on a bench there are a multitude of ways to remove the bushings. There are tools you can buy, you can make a home made one with hardware store parts, etc... I was doing this late so I found an easy way to do it using a 6" HF C-clamp and a 36mm socket. Just tighten good and tight, wait a minute, come back and it'll be loose, retighten, and keep doing this until it comes out, only takes a few minutes this way.


    Once you have new bushings in (I bought Powerflex and they fit great) installation is the reverse of removal. If you have any other stuff you wanted to do on the rear end this is a great chance to do it. I did alot; rebuilt and painted both calipers, new inner CV boots, new spring pads (the old were missing), new emergency brakes (were completely missing on the passenger side:-x), and new SS brake lines. Some things I also considered but didn't need done, but you might want to think about are rear wheel bearings, shocks, swaybar, end links, etc... I used lock-tite 242 and nickel anti-sieze as required on fasteners and parts. I also used disk brake lube on the caliper slide bolts.


    Here is a list of torques and tools

    Torques (ft-lbs):
    - caliper bracket to TA: 44-49
    - caliper to caliper bracket (slide bolts): 22-25
    - lug nuts: 74
    - shock to TA: 52-63
    - swaybar to TA: 16-17
    - inner CV socket head cap screws to diff: 42-46
    - axle nut: 144-155

    Tools
    - 2 or 3 jaw puller
    - 36mm socket and 6" c-clamp (for bushing removal)
    - 6, 7, and 8 mm allen wrenches
    - 7, 10, 14, 15, 17, 19 mm wrenches (racheting wrenches will help alot)
    - 11mm flare nut wrench
    - 10, 14, 15, 17, 19, 30 mm sockets and ratchet, impact, deep and shallow
    - wire, PB blaster or eq, brake parts cleaner, grease for calipers
    - various pliers and visegrips
    - cordless and air impact helps alot
    - various screw drivers
    - rubber mallet and hammer(s)
    - as a side note I ended up needing a 14mm crows' foot to access the brake lines between the TA and the hardlines that go above the diff, these were a total bitch to access with the subframe in place.

    This is what I can remember from the top of my head, might be a few other things. Took me a good 12 to 14 hours total wrench time for both sides. I spent some more time cleaning and rebuilding things, sandblasting parts and painting so it took me a bit more.

    #2
    Great Write-up! Thanks! I'll keep you on my speed dial...I plan on tackling this job in the next few weeks (along with wheel bearings and cv boots).

    Comment


      #3
      you came off lucky with pressing the axles out of the hubs

      I know some folks on here had to take their whole T/A set up with axle still hanging on to a press to be removed. Even then, some folks had trouble getting that sunuvabitch out.
      2008 335i - n54b30
      1991 318i - m52b28
      1994 fzj80 - LAND CRUSHER

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        #4
        Just a tip, if all your doing is R&Ring the trailing arm to replace the bushings there is no point in pressing the axle out of the trailing arm.

        Comment


          #5
          Originally posted by drumad View Post
          you came off lucky with pressing the axles out of the hubs

          I know some folks on here had to take their whole T/A set up with axle still hanging on to a press to be removed. Even then, some folks had trouble getting that sunuvabitch out.
          really..i just hammered mine out. it was easy. to get the bushings out of the TA i just torched the rubber. burned em out and used a table press thingy to put them in. nice finally putting up a write up tho. I had to figure this all out myself. this is the best time to install SS brake lines.

          btw how are those bushings holding up. ive heard the urethane bushings dont hold rear wheel alignments as well as stock
          m20 is plenty. im simply a drifter.
          build thread -- http://www.r3vlimited.com/board/showthread.php?t=206510

          Comment


            #6
            I think it would be easier to just drop the whole subframe, no messing with half shafts just undo the trailing arm bolts once droped and pop them out of the diff.

            Comment


              #7
              Originally posted by nwvb bmw View Post
              I think it would be easier to just drop the whole subframe, no messing with half shafts just undo the trailing arm bolts once droped and pop them out of the diff.
              yeah this is what I did with my early model. Plus power tools helped me a lot.
              Your signature picture has been removed since it contained the Photobucket "upgrade your account" image.
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              89 E30 S52
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                #8
                Nice write up! This is something I really am not looking forward to doing.

                Comment


                  #9
                  just drop the whole subframe. it is vastly easier and requires much less painstaking disassembly. plus, you can address lots of other issues while you are in there.
                  2006 GMC Sierra 2500HD 4WD LBZ/Allison
                  2002 BMW M3 Alpinweiß/Black
                  1999 323i GTS2 Alpinweiß
                  1995 M3 Dakargelb/Black
                  - S50B32/S6S420G/3.91
                  1990 325is Brilliantrot/Tan
                  1989 M3 Alpinweiß/Black

                  Hers: 1996 Porsche 911 Turbo Black/Black
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                    #10
                    Good write-up for sure! I did mine just a little different -

                    I dropped the whole rear assembly out, separated the trailing arms from the sub-frame and pressed out the bushings just hanging there. I didn't have to mess with the e-brake assembly or anything else of that sort.

                    Originally posted by nrubenstein View Post
                    just drop the whole subframe. it is vastly easier and requires much less painstaking disassembly. plus, you can address lots of other issues while you are in there.
                    Agreed here.


                    Project log -- DIRTY 30

                    2.7i * Megasquirt tuned * E85 powered

                    Comment


                      #11
                      getting ready to do this, along with the rear diff bushing and subframe bushings. plan is to drop the subframe and swap everything.
                      Simon
                      Current Car:
                      -2017 i3 REx, 21st Century E30
                      -1975 Alfa Romeo Giulia Nuova Super 1300, the never-ending name & project



                      Make R3V Great Again -2020

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                        #12
                        thats a good plan 2Man ... I wish I had done my upper SS lines at that time when I had everything out. You're in the Lynnwood area right? I have the AKG tool to remove the stock rubber TA bushings if you need to borrow it.
                        Parts Collector and Former Houndstooth interior junkie.

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                          #13
                          Thanks! I probably will want to borrow it. After looking through this DIY, im also thinking about doing the e-brake cables and the brake lines. Also planning on changing the diff oil too
                          Simon
                          Current Car:
                          -2017 i3 REx, 21st Century E30
                          -1975 Alfa Romeo Giulia Nuova Super 1300, the never-ending name & project



                          Make R3V Great Again -2020

                          Comment


                            #14
                            how do u like the powerflex bushings?

                            Comment


                              #15
                              I get to do this in a few weeks. :/

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