That is nothing more than a dust cover. The seal is on the inside. If you are not leaking ATF, the seal is good. As far as the "grease, " I'm not sure why it is there. Nothing there is greasable other than a thin coat of grease on the splines.
Let me know.
Also, are you sure the u-joints are good? They can cause a vibration.
Friday, October 1st, 2010 AT 8:03 AM