Good news and bad news..I did this. Good news is there is an easy way to remove the rubber bushings from the steel sleeves that are pressed into the mounts on the axle. Heat the sleeve on all sides (wear safety glasses as the bushing may pop out and take flight) and use some needle-nose to pull the bushing out, grease the polys and side them back in the sleeves the rubber ones were heated out of and "re-install". The bad part is that although its easy to heat the pass side and get it out without removing the sleeve from the axle bracket, the drivers side is pressed into a cast piece on the diff housing, I wouldn't recommend trying to heat that up. I removed the sleeve and bushing with a BFH and applied the torch, worked fine but I never really got the sleeve pressed back in the way it was.....maybe someone has an answer for that.
HTH
P