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  1. #1
    RC Champion fourdub's Avatar
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    Traxxas UDR Trailing Arm Replaced, Soon to be metal.

    Hey guys

    I would love to see pictures of your broken trailing arms, and replacements,! Please post them here.

    I didnt have a broken trailing arm, but i did have a damaged one.

    I loaned out the other one, and had a set incoming.

    So i replaced both trailing arms today, and the OEM one, is going to be my backup.

    In the picture you can clearly see its starting to bent off to the side, or maybe its crushed in a little bit. But either way it does look like it is weakening it structurally and maybe causes it to push off to the side when trying to drive straight.





    I am trying to come up with a bracing system that goes over the trailing arm, like a overlay or protector.

    like this




    i have these on order






    The reason i want the pics, is to see where the most common fail spots are, and design a small upgrade for it.

    will post more pictures of trailing arm stuff here as it happens, but please post your experiences and pictures
    Sla2hvxl,pe4evxl,erevobl
    "Richard Chilson"youtube

  2. #2
    RC Champion fourdub's Avatar
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    broken next t o new metal











    will do a install video.
    Sla2hvxl,pe4evxl,erevobl
    "Richard Chilson"youtube

  3. #3
    RC Champion fourdub's Avatar
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    Installed the trailing arms. video got messed up, rather than switch the arms out to do it again, i will just skip it for now.

    here are some pictures of the truck with the arms on it.









    Sla2hvxl,pe4evxl,erevobl
    "Richard Chilson"youtube

  4. #4
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    The second time i ran my new UDR the trailing arm bent. Looks EXACTLY like the failure ya'll experienced. Did Traxxas offer to send replacements? Defective parts?

  5. #5
    RC Racer MaxxPain's Avatar
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    I ordered these from MFR. Uppers and lowers.





    Uppers


    Xmaxx, Rally, Slash 4X4, Summit 1/16

  6. #6
    RC Champion fourdub's Avatar
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    I am not sure if my friend requested replacments from traxxas or not. he ordered plastic and metal replacements himselfs.

    i heard people say traxxas has send them arms.

    give them a call, they are super helpful.

    i personally only called them for my servo. the rest of the broken parts, are mostly myfault... (rolled down a 300foot hill lol)


    hey MaxxPain those links are nice looking. how much those lowers set you back? i got the metal ones for 50 a set.

    those look pretty nice.
    Sla2hvxl,pe4evxl,erevobl
    "Richard Chilson"youtube

  7. #7
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    nice, 2 companies now with plastic rod ends.

    the MFR looks kind of tempting, look better than Afro Lucha's https://afrolucha.com/shop?olsPage=p...-trailing-arms

  8. #8
    RC Racer MaxxPain's Avatar
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    I think they were $70 with a 10% discount code. Shipping was like $6. I like this design for a few reasons. They are straight and smooth for going over things. The rod ends are not machined into them which. Traxxas makes super strong rod ends and if they fail, you can replace them. I like how the rod end is supported for extra strength. The cost seemed pretty close to all of them.
    Xmaxx, Rally, Slash 4X4, Summit 1/16

  9. #9
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    subscribed, this seems like a very interesting thread

  10. #10
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    They look great. But why, if you're already bending and breaking plastic ones, would aluminum be a better choice? It's heavier, they does flex, they bend. Not bashing, but it looks like you railed your truck down a mountain, just looking at the pics, i can't see how aluminum would give you better durability. Just curious as to your thoughts.

  11. #11
    RC Champion fourdub's Avatar
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    lots of Snapped ones, is the reason for my switch. I personally didnt break one, i bent one.

    I really want to see what will break next after that part is reinforced.

    It seemed like it would be a decent upgrade.

    I really did roll it down a mountain, so your right in your inspection

    Sla2hvxl,pe4evxl,erevobl
    "Richard Chilson"youtube

  12. #12
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    haha..........Now you have me considering them!

    You aren't lying! Is that your that did a barrel roll on the moutain/hill?

    Looks like you went some serious distance with that baby! I love the area you have to play in. Very Jealous i am.
    Last edited by SHIFTT IX MR; 05-08-2018 at 10:56 AM.

  13. #13
    RC Champion fourdub's Avatar
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    thanks Shift!

    out today with crazyxmaxx






    i broke the front sway, front lower a-rm today.
    Sla2hvxl,pe4evxl,erevobl
    "Richard Chilson"youtube

  14. #14
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    I already bent an arm on the second run...ordered the stock ones as I prefer to bend those i stead of something bigger.

    Quick question (back to rc from years), should I grease/oil the metal balls/junctions on all the suspension arms? It feels rough bow...looks like my suspension is all stuck with dirt...Shocks leaks so badly I wonder if there is some left!!!

  15. #15
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    Shock maintenance needed - keep em clean
    Check fluid level- UDR on roof - move shock - hear the level
    No lube on joints- or will collect dirt
    Stuck feeling maybe shaft throw coming out trans- lube / clean
    fabricator

  16. #16
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    Thx for the tips.

    Alright, while the truck is out (arm + servo failures), I might grease all the diffs and redo the shocks.
    I did the transmission already with a lot of grease, maybe dirt around the shaft yeah.

    Last out of topic question, where to get some spring sleeves for this ? Spring are huge, I didn't find anything I would sure to fit

  17. #17
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    Bought the MFR upper links- had to use a bench vise to install the balls
    Way too tight of fit after install
    Suspension binds = not usable
    Back to stock
    fabricator

  18. #18
    RC Racer
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    Quote Originally Posted by CrazyXMAXX View Post
    Bought the MFR upper links- had to use a bench vise to install the balls
    Way too tight of fit after install
    Suspension binds = not usable
    Back to stock
    thanks for testing

  19. #19
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    Good info thanks,

  20. #20
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    So- Jeremy Reed owner of MFR messaged back stating
    warming the ball end in hot water will aid in ball installation
    The tightness will loosen up in about a pack
    ...
    fabricator

  21. #21
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    I installed the upper arms from MFR and same situation....way too tight, no movement whatsoever. I haven't had a chance to run mine yet, waiting on the lowers to arrive today. Curious to see how much improvement there is.

  22. #22
    RC Racer MaxxPain's Avatar
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    I just finished installing upper and lowers. I followed the instructions, warm water and a tad of oil on the pivot balls. After I installed the pivot balls, I turned them with pliers and they immediately turned alot easier. Wiped off ann access oil and installed them. Suspension cycles fine. No sticking. Will try it out in a day or so. I also changed the shock bolts which were stainless, to longer 3x20mm alloy bolts with a washer and lock nut. I dont want these bolts bending or coming loose.


    Sent from my SM-G965U using Tapatalk
    Xmaxx, Rally, Slash 4X4, Summit 1/16

  23. #23
    RC Champion fourdub's Avatar
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    nice guys, keeps the pictures coming. we broke to more trailing arms at the track today.

    one super bent, the other snapped but stay'd together.







    this area seems to be the weak spot.... top one is a "spare" the bottoms are no longer useable, except the ball joints.

    Sla2hvxl,pe4evxl,erevobl
    "Richard Chilson"youtube

  24. #24
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    Decided to give out the MFR trailing arms and uppers.
    Got them in mail today.

    They are definitely robust, especially the uppers.

    I really like all the shock placement options on the trailing arms. The only one that has that many points out of all the metal arms on ebay right now.

  25. #25
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    I was told Mfr uses the tighter ends because traxxas refuses to sell just the ends that are on the uppers separately. There are no other aftermarket ends available.
    Last edited by Galyion; 06-04-2018 at 07:25 PM.

  26. #26
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    Finally snapped a front A arm. Hit a small hole I didn't know existed in my yard and boom. Clean break, seemingly nothing else. I have a couple sets I already purchased just in case.

  27. #27
    RC Champion fourdub's Avatar
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    nice guys, our dhawk trailing arms still holding up good.
    Sla2hvxl,pe4evxl,erevobl
    "Richard Chilson"youtube

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