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Rear Upper Toe Control Arm Cracks

 
Old Jul 7, 2011, 11:32 AM
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Rear Upper Toe Control Arm Cracks

Started to install Energy Suspension Bushings today and noticed this:

Rear Upper Toe Control Arm Cracks-photo.jpg

Rear Upper Toe Control Arm Cracks-photo1.jpg

Rear Upper Toe Control Arm Cracks-photo2.jpg

Rear Upper Toe Control Arm Cracks-photo3.jpg


Both driver and passenger side is like this. I assume I need to replace both arms? What would cause this?
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Old Jul 9, 2011, 09:22 PM
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Yikes. Definitely you need to replace those "toe" arms. I've never heard of this happening. Were these hammered on in the past?
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Old Jul 9, 2011, 10:55 PM
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Originally Posted by shadow1 View Post
Yikes. Definitely you need to replace those "toe" arms. I've never heard of this happening. Were these hammered on in the past?
They shouldn't have been. They've never been off the car. The only thing that has been done to the rear is brake pads. That's why it's got me stumped on how this could have happened. I noticed that I spelled "toe" wrong after I created the original thread, but couldn't edit it.

Last edited by scherejs; Jul 9, 2011 at 10:58 PM.
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Old Jul 12, 2011, 07:04 PM
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Wow

Wow haven't seen that before. I got some used ones for sale if you still haven't changed them.
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Old Jul 14, 2011, 07:21 AM
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Originally Posted by Stan C. View Post
Wow haven't seen that before. I got some used ones for sale if you still haven't changed them.
Thanks, but I've already got them swapped out. I had never heard not seen that either.
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Old Jul 14, 2011, 10:36 AM
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Guys over in the UK have had problems like this, on the bush end too and they have also had problems with the upper arm cracking aswell.

It always cracks along that forging line but the arms that tend to crack over there are the evos that are driven during winter lots as corrosion sets in and weakens it there.
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Old Jul 14, 2011, 03:41 PM
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Originally Posted by Yogi_B View Post
Guys over in the UK have had problems like this, on the bush end too and they have also had problems with the upper arm cracking aswell.

It always cracks along that forging line but the arms that tend to crack over there are the evos that are driven during winter lots as corrosion sets in and weakens it there.

Mine has had many miles put on it in the snow and salty roads. Maybe that was the problem. I really don't know, I just hope I don't have it happen again.
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Old Jul 15, 2011, 12:07 PM
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Those parts are aluminum, I don't think rust and corrosion would affect them. Are you the original owner of the car?

Do you track your car? I would think the car would have to see some severe stress for that to happen. Might possibly have been defective from the factory.

Last edited by mithrandir7533; Jul 15, 2011 at 12:10 PM.
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Old Jan 2, 2019, 07:16 AM
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Necrobump. Just found one of mine cracked the other night. Check your arms people!



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Old Jan 2, 2019, 07:26 AM
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Good catch. This failure is likely more common than whats been reported
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Old Jan 2, 2019, 10:53 AM
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I have hard race rear toe arms. The stock ones came off at 55k miles with no apparent issues. How many miles on yours? Lots of track use?
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Old Jan 2, 2019, 11:11 AM
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Bout 110k, tons of track time over the past 6-7 years.
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Old Jan 2, 2019, 11:23 AM
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Would probably just chalk it up to fatigue over time. With track use, it is being subjected to much harder impacts (and much more often) than it was really designed for...
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Old Jan 2, 2019, 11:28 AM
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Yea it's not mindblowing or anything to see this, just haven't heard of it being a problem before.
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Old Jan 2, 2019, 11:31 AM
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Originally Posted by ayoustin View Post
Bout 110k, tons of track time over the past 6-7 years.
Just want to make sure which arm failed on your susp

Trailing arm? (Dallas's arms) Item 1
or
Upper link Item 2

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