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Old 08-25-2012, 01:53 PM   #1
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Default Interesting RB endlink failure

So I did an HPDE last weekend at Sebring, car handled great, drove great no issues.

2 days ago, I heard a really bad clunk from the driver's side suspension, and felt something hit the floor of the car. Thought maybe I hit a rock or something on the road, I stopped and checked it out as best I could and didn't notice anything. No adverse handling effects at all.

This morning I was just doing some standard tinkering looking over everything and double checking my pad wear.

I found this:



So from this it looks like maybe the endlink was overtightened? Caused the middle support to break? Anyone have thoughts on how this could happen? I'm going to call around on Monday to see if someone can just sell me one, instead of a replacement set, the other side is fine.
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Old 08-25-2012, 08:17 PM   #2
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If you have to replace the whole set, I would recommend you go with 949's endlinks.
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Old 08-25-2012, 10:17 PM   #3
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If that is a Racing Beat endlink it probably broke from binding.
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Old 08-25-2012, 10:44 PM   #4
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If that is a Racing Beat endlink it probably broke from binding.
How do you mean? It just got crossthreaded or something?
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Old 08-26-2012, 01:15 PM   #5
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No like the poly links bound up and put all the bending force into the middle section that should have just been taken as rotation in the joints on the.
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Old 08-26-2012, 04:17 PM   #6
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No like the poly links bound up and put all the bending force into the middle section that should have just been taken as rotation in the joints on the.
Got it. That is most likely what happened when I look at it closer. It also sucks haha. If I can't get RB to send me just one, I'm buying the 949 endlinks for sure, should have just done that to begin with, I didn't realize there could be issues with the poly bushings.
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Old 08-26-2012, 04:20 PM   #7
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Your options: Buy a pair from RB and keep one as a spare. You'll never need it. OR go to a lot of trouble to just buy one and then the other, previously non-broken link will break within months.

Seriously though, RB endlinks are great and awesome and my favorite ever. On the street. For track duty, they're not that robust.
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Old 08-26-2012, 07:14 PM   #8
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He already broke a set of RB links. If you must have poly the racelands look a bit better than the RB since they are properly adjustable.
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Old 08-26-2012, 07:16 PM   #9
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The only good reason to use poly bushings on sway bar endlinks is if they are required by your sanctioning body's rules. This is the race forum after all.
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Old 08-27-2012, 05:12 PM   #10
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RB wouldn't sell me just one endlink, so I'm replacing that crap with 949 endlinks. Banging my head, totally should have bought these in the first place.
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Old 08-27-2012, 08:47 PM   #11
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Quote:
Originally Posted by Leafy View Post
He already broke a set of RB links. If you must have poly the racelands look a bit better than the RB since they are properly adjustable.
Except the narrower section built into the Raceland's center turbuckle studs that the RB's don't have. My educated guess is the Raceland's are weaker than the RB's in that particular area, not stronger.


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Old 08-28-2012, 07:17 AM   #12
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But they are adjustable, so you can make them less likely to bind up. Still nowhere near as good as the 949 ones.
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Old 08-28-2012, 09:28 AM   #13
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949 endlinks or die. They are the only ones that properly address the angle of the front bar.
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Old 08-28-2012, 11:23 AM   #14
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Quote:
Originally Posted by Braineack View Post
949 endlinks or die. They are the only ones that properly address the angle of the front bar.
NB OEM is not bad either (and you only need one of them to be adjustable CW-vise).
Going from Non-binding NB OEM (it's a NB LCA in the OP picture) to those RB ones
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Old 08-28-2012, 11:27 AM   #15
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Never seen NB ones, but to install a RB endlink in the stiff hole as seen above is the devil's work. I'm surprised mine haven't failed yet, but when they do, I'm sourcing 949 endlinks as a replacement.
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Old 08-28-2012, 01:55 PM   #16
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Quote:
Originally Posted by Braineack View Post
949 endlinks or die. They are the only ones that properly address the angle of the front bar.
I've got a pair from Gearheads Garage that have held up to years of abuse. They also used misalignment spacers on the lower joint. They just used a ball joint at the top.
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Old 08-28-2012, 02:14 PM   #17
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Well, they arent a sponsor, so **** um.
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Old 08-28-2012, 06:54 PM   #18
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Point taken.
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Old 08-29-2012, 09:22 AM   #19
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I never knew how much my bushing type end links were binding until I replaced them with 949's. It was night and day. My suspension moved so much more freely, it was compressing more and I suddenly had tire rub on my shock towers while braking!

Last edited by Handy Man; 08-29-2012 at 03:34 PM.
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Old 08-29-2012, 10:42 AM   #20
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Quote:
Originally Posted by Handy Man View Post
I never knew how much my bushing type end links were binding until I replaced them with 949's. It was night and day. My suspension moved so much more freely, it was compressing more and I suddenly had tire rub on my shock towers while breaking!
I hope that doesn't happen to me! I'm cutting it pretty close on clearance already, need to roll my fenders soon...

They've been shipped, I hope they get here before Saturday.
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