how difficult is it to change the 4 rear sub-frame bushings?

[AmunRoo]

One of my sub-frame bushing washer rusted out and fell off.  now i'm getting super annoying clunking no matter the terrain.  If I'm changing one, i may as well change all 4.  How difficult of a job would this be?  I couldn't find anything on here about those damn bushings... lol

[AuroraGirlFromMars]

There is an important thing to know here. This body is similar to the lesabres and 88s of the era, where the subframe mounts are notorious for holding moisture and rotting. Did the mount itself go bad or did it rust the unibody and pull through?

My 1990 Olds 88 died because of the unibody rusting and it pulled out.

They arent hard to replace... if you can replace them. Basically, the mount is one big sandwich that threads into the unibody. If you support the subframe with a jack you could undo all 4, drop it down far enough to remove old bushings, then put new ones in, and boom solid. Just need to lift it up and down with a jack and put the bushing in the proper way.

They are probably in there tight so an impact or breaker bar with a 6 point socket would make you life a lot easier.

However, if you see extensive rust damage to the area around in on the subframe, do NOT attempt to remove them, because you might just permanently destroy it.

Fortunately, my Aurora, as worn as her engine may be, has very little rust on the unibody so that issue never arose for me.