I think except for the front upper A-arm they are all rubber flex joints that are set in the middle of the travel. The upper front looks like its greased. My Teryx was like the upper front A-arm and was still ok at 10,000 miles. The bushings were still ok so I greased them and installed new seals. A squeak may be the shock bushings. I'm at about 7,800 miles and the suspension is still ok. I don't run my suspension under water but I think that may be more of a problem for the shock mounts. I will take a look at the shop manual.