Just got a 91 5 speed n/a with 111k.

Power steering whines bad and doesn't work when sitting still. The cap doesn't tighten so it leak , and doesn't have a lot of pressure, can that make it whine? Yes I'm using atf lol

Also, the rear end feels like it swings out when I hit bumps, struts?

Next wheel bearing hums, hard to replace? Also where is a good spot to find oem parts? Thanks for reading guys!