Larry my mechanic says you don't.

If I was doing it, I'd support the differential with a tranny jack and remove the two rear bolts and the front top bolt and let it donw slightly so you can get at the bushings. The axles and driveshaft should move to allow you to do this. When I rebuilt my rear suspension, I swapped differentials, so I don't have direct experience with your problem.

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Brian Toscano