After I rebuilt the front suspension I have always had a thunk in the front from small dips or bumps. Recently I greased the front suspension and could not get the inside upper bushings to accept grease. When I removed the zert the grease looked like grey paste.
This was the first time I had ever tried to rebuild or install front suspension parts. Obiviously I need to clean and remove the grease. I have been told the bushings may be to tight causing the "thunk" and not allowing the grease to move through the bushing.
So I have been thinking about backing off the bushings a turn or two to see if that alievates the "thunk". Also try to push through the grease with a zert cleaner.