Is it possible to install a pinion snubber without removing the differential?

My car is at a shop, they were supposed to replace the diff mount bushing and install a pinion snubber. They installed the pinion snubber but didn't replace the diff. mounts and said they didn't have enough time to replace the mounts and would get to them at a later date.

I'm kinda thinking they forgot to replace the diff mounts, unless there's a way to install the pinion snubber without removing the differential.

 

It is possible to do it without removing the diff. same with the front diff mount, there is no need to remove the differential to replace it. Getting everything lose, perhaps, but its not necessary to remove it.

 

Diff has to be removed to remove the rear diff mount bushings. Have to be pressed out) or other methods).