Upper control arm bushing extra part?

ChuckDock said

I know there are a million posts about how to replace uca bushings and I watched video's and read forums but was surprised to see this extra spacer (?) on one side of the uca but not the other. It was hell to get the bushing out and I ended up cracking this "extra" part. The part in the pic shows the cracked ring that was on just one side of the control, not the other.
Can I just install my new bushing without that part?

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I might be 6 mo late here but may have some to add... after rebuilding the front suspension on my Dart using all new rubber bushings and so, I got pretty upset hearing an old noise in the front suspension I thought I had got rid of... but still there... sometimes pretty loud thump or bang... After some wondering and looking every part I noticed a space between the uca and the end of the front bushing... maybe the front bushing got loose???
Just yesterday I decided to tape my cell phone in the front fender and watch what might be happening while driving back and forth...
I posted some pics and a link to the video showing the brand new front bushing on the passenger side uca.
The rear bushing seems to be ok and has the metal collar I put back.
Now I need to take the UCAs off again and figure what to do, but one thing is certain, I like that collar, won't hurt...

Watch this... what should I do?