Remove bolts, remove and replace unit.
This worked for my 55.2 3100. I got shocks at a local parts store, but I ended up returning & getting all four from Summit with a limited 50%-off sale. ($40 vs. $80). I like to keep business local, but $40...
You'll probably want some rubber bushing - safe lube; the new shocks will fit tight. Edit- there are two types of shocks you probably read about. I'm referring to the 1-1/2" to 2" (est.) 20" long (again, estimated) cylinders (4 total) that mount on front & rear.
Brad