Oops! I was going to warn you, but my computer wouldn't connect to the internet in time.
I wrote the step-by-step installation referred to earlier and tried to point out there that those linkage bushings pop in much easier when softened a little in hot water. Guess you figured that out by now.
By the way, the grease is not actually needed on the outside of the bushings to ease their installation. You need to put a dab inside the hollow pocket of the bushings where the other linkage arms will snap in. It lubricates the joints where they pivot. I don't know if I made that clear in my write-up.