Bought a solid diff mount on eBay, I was wondering what is exactly involved in replacing it. It looks as if you have to take the sub-frame down, is that true?

 

yes. drop the subframe. but with a long extension (3') you can leave the subframe just hangign on your jack and reach the 3 bolts that way. This way, you dont need to drop the subframe all the way down to the ground.
-a

 

ok then, that's not too bad, i was hoping i didnt have to drop the rear end.