Rear Trailing Arm Bushings (RTAB) Replacement

Chengy

Member
Warwickshire
Hi all,

Thought I'd post a how-to guide as I couldn't find one in the forums. I found videos on YouTube but none of them really described the process from start to finish. I did look at adding it directly to the how-to sub forum but didn't find an option - probably a good thing as my guide may be rubbish and doesn't deserve to be in there!

I replaced my RTAB's with these: https://www.carparts4less.co.uk/p/powerflex-performance-bushes-973110331

Also used a bush removal tool like this one: https://www.ebay.co.uk/itm/255864761347?mkevt=1&mkcid=1&mkrid=710-53481-19255-0&campid=5338723872&toolid=20006&customid=okrivPsVAAAA_GM3LZ3kjJAo6z8uAAAAAA

Once you have jacked the car up, put it on axle stands, chocked the wheels and given the car a good push to make sure it isn't going anywhere:

1. To remove this plastic cover, undo these three nuts

RTAB-1.png

2. Going underneath the car, remove this nut. You should then be able to remove the cover in the first photo.
If you still can't remove the cover then check underneath, may be a plastic fastener which needs to be pushed (my one in this guide didn't have any, may have fallen out!)

RTAB-2.jpg

3. Once cover is removed, locate and loosen this nut (do not remove)

RTAB-3.png

4. Unclip this wire from the plastic bracket before removing the bracket entirely

RTAB-4.png

5. Open the plastic housing and locate these electrical connectors. Remove connectors from housing, being careful not to damage wires by sliding the tops out first as highlighted:

RTAB-5.png

6. Connectors should then be loose

RTAB-6.png

7. Getting under the car, pull these wires out of the plastic clips so they're slackened

RTAB-7.png

8. Wires should be slackened like so

RTAB-8.png

9. Separate the connectors via the clips

RTAB-9.png

RTAB-10.png

10. Next, locate this bracket on the trailing arm and undo nut

RTAB-12.png

RTAB-14.png

11. Unclip the wire from another plastic clip further along

RTAB-13.png

12. Getting behind brake discs, locate and undo this nut

RTAB-15.png

RTAB-16.png

13. Check these wires are slack, so that when you lower the rear trailing arm it won't pull any cables.

Screenshot-2023-03-30-at-22-09-44.png

14. Locate these three nuts and mark their current position - this is to maintain current alignment as much as possible before you lower the rear trailing arm to get access to the bush, although alignment is definitely recommended anyway

RTAB-18.png

RTAB-19.png

15.Position jack ready for lowering the rear trailing arm

RTAB-20.png

16. Undo the three nuts and slowly lower the trailing arm - note the wires which are loose so they aren't getting pulled when lowering the arm

RTAB-21.png

17. Once lowered, use a piece of wood to put pressure on the trailing arm to push it down for access

RTAB-22.png

18. Loosen the nut holding the bushing carrier in place using a socket/wrench on each side. I had to use a breaker bar on mine!

RTAB-23.png

RTAB-24.png

19. Once you've removed the carrier and left with the bush, prepare your bush removal tool

RTAB-25.png

I used the spanner on the other end propped against the trailing arm to give me the resistance I needed to tighten the nut closest to me on the removal tool, I've tried to highlight the position of the spanner

RTAB-26.png

RTAB-27.png

20.Start tightening the tool and you should see the bush being pressed out. When done, loosen the tool and you'll be presented with your reward, the bush located inside the tool.

RTAB-29.png

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To remove, I used a socket extension to hammer out (be careful, don't get it stuck!)

RTAB-31.png

21. Next, use fine grit sandpaper to clean and polish up the bushing housing

RTAB-32.png

Should be nice and smooth when finished

RTAB-33.png

22. Now prepare your new poly bushes, grease up the metal tube thing and the outer flanges of the poly bushes using the provide silicone grease. The theory here I think is to apply grease to where there's contact or lack of air between two surfaces, so that you don't get the squeaking

RTAB-34.png

23. Use a clamp to apply pressure to both sides of the bushes during installation to ensure a nice tight fit across the whole bushing

RTAB-35.png

24. Using your finger, apply some more grease inside the hole before placing the metal rod in (oo-err!)

RTAB-36.png

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25. Use the clamp again to get the rod in all the way

RTAB-38.png

26. Check bushes and the rod are seated correctly

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27. Place the carrier over the top of the bushing and into place - needs a good push to get it seated like before

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28. Tighten back up to 100NM using a torque wrench

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29. Raise the trailing arm back up. My jack didn't go high enough so I used a rubber mallet to give me more height, being careful to adjust the positioning as there was movement. You may find a much better way than this!

RTAB-43.png

30. Seat the carrier back into the original position - you will need to do some pushing and shoving to get the holes to align, I put the bolts in whilst pushing to get it aligned then tightened afterwards. Tighten the bolts to 77NM using a torque wrench.

RTAB-44.png

31. Time to start putting the wires back into place! Tighten this bracket to the trailing arm

RTAB-45.png

32. Clip wires back into their holder:

RTAB-46.png

33. Going behind brake disc again, tighten this bracket using the nut

RTAB-47.png

RTAB-48.png

34. Going under the car, clip the wires back to the trailing arm using the clips

RTAB-49.png

35. Plug connectors back up:

RTAB-50.png

36. Seat connectors back into the plastic housing, paying attention to the top of the connectors to slide them back in

RTAB-51.png

37. Put this plastic trim back in, lining the back of the bracket with the nut at the back so that the nut will hold the bracket in place.

RTAB-52.png

RTAB-53.png

Use socket with universal joint adapter to tighten easier

RTAB-54.png

38. Check for loose wires back and clip back into their plastic clips

RTAB-55.png

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I used some velcro as some of my clips had broken to hold the wires in place - not sure how sustainable that is!

RTAB-57.png

39. Re-install this piece of plastic and tighten three nuts, being careful to get the bottom flap into the hole

RTAB-58.png

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40. Going under car, tighten this nut to lock the plastic trim pieces together, as well as other nuts/clips you may have removed at the beginning

RTAB-60.png

Wheels back on and that's it! Remember to get an alignment too.

I hope I've covered most of it - I am completely new to all this so I wanted to break it all down step by step to how I would have wanted it as a beginner. Please point out any inaccuracies or better techniques!

Thank you,

Chengy
 
This is a fantastic write up! I am about to tackle this one in a couple of weeks and your detailed steps and high quality pictures will no doubt help!

Quick question about the powerflex bush you used... how are you finding the ride comfort and/or road noise after swapping? I've heard they can be a bit more rigid causing more NVH.
 
Great write up! Mine need doing... if only I had the balls!
Been quoted £120 each side for labour, seemed steep but maybe not given the work involved
 
19. Once you've removed the carrier and left with the bush, prepare your bush removal tool

RTAB-25.png

I used the spanner on the other end propped against the trailing arm to give me the resistance I needed to tighten the nut closest to me on the removal tool, I've tried to highlight the position of the spanner

Corrected step 19 - tighten, not loosen the removal tool

Also corrected wording - when I said screws, I mean nuts.. :headbang:
 
TheDan said:
This is a fantastic write up! I am about to tackle this one in a couple of weeks and your detailed steps and high quality pictures will no doubt help!

Quick question about the powerflex bush you used... how are you finding the ride comfort and/or road noise after swapping? I've heard they can be a bit more rigid causing more NVH.

Hey Dan,

Cheers! I think the toughest parts of the job were loosening nuts which looked they hadn't been touched for 20 years. My torque wrench had no joy so had to use the breaker bar which was invaluable.

I had the same concerns about the power flex bushes, but I've found the ride to be pretty much the same (feels tighter at the back now) and no road noise from the bushes either. Hope it stays like this for the long term. Installing OEM bushes seemed a lot more complicated with pretensioning needed, limiters etc so the power flex bushes were great for me as a beginner.

Thanks
 
Also, shout out to [ref]plenty[/ref] for giving me lots of help/advice during the process and selling me the RTAB tool.

If anyone is interested in buying the RTAB removal tool from me please let me know.

Cheers
 
From memory you need a special tool to line up the bush on tightening so it isn't stressed.

Yantekin made a homemade one... see pickie

I also went for both poly RTAB's & RTAL's just in case.
 

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ashley544 said:
Chengy

Great detailed write up

Id be interested in buying the tool

Whereabouts are you

Hey Ashley,

Sorry for late reply. I’m in Warwickshire, if that works send me a PM. Could meet you somewhere too. I’ve just got to check the tool is still working fine as may have damaged the threads slightly..
 
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