Originally Posted by late_99_PSD
I believe that seal you talking about is the dust sheild at the end of the tube. It won't leak any fluid, but it will let dust and dirt up into the axle tube. Personally I wouldn't worry about it untill you have to have the axle out for something. The grease buildup is probably just from grease off the u-joint or ball joint.
Also whenever i hit bumps it has a clunking noise or chatter noise all shocks, are tight, ball joints are good, i was reading on here about some bearing needles or something like that could be bad, i dont know, the yoke barley slides in and out,