What is this?

I've been getting a grinding sort of sound from the front suspension when compressed, and a light clunk when accelerating from a stop. I haven't been able to figure out where it's coming from, but aftermarket upper arms were recently serviced and didn't correct the issue. Looking under my truck today I noticed that the bushing (or whatever) that is part of the lower arm connection towards the wheel was covered in oil/grease and I don't remember it being that way previously. Can someone answer for me whether that's normal, and if not, what part it is I need to replace?

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Looks like the lower balljoint not sure if it comes with control arm or not.

That ball joint is toast.

Here is everything you need to know.

http://www.fordraptorforum.com/f9/ball-joint-replacements-38764/

@crash457 thanks!

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