Which Bushings have you Replaced?

[ryan-in-oregon]

I replaced the front lower rear bushings today. In the process I noticed that the two upper bushings on my passenger side are shot. Now it appears as if all the bushings on the driverside are/were still in good shape (The tell tale clunk was only on the passenger side). So have any of you noticed which bushings were actually failing?
Ryan
05 SEV8 w/51k miles

 

[Houm_WA]

Both sides, front lower control arm bushings.