The rear lower (main) control arm has a bushing on the inside. The outer side is a "bushing looking" ball joint that is pressed into the hub carrier.

To get the lower control arm out you can do it without a spring compressor. First, disconnect both the shock lower end and the sway bar link from the control arm. Then support the body, lower the wheel just below where it would stop when the shock is attached (the shock limits travel downward), then support the inner attachment with a jack. Remove the bolt, then carefully lower. The tension will go off the spring on the seat, then you can remove the outer bolt and remove the arm. Disclaimer: care must be exercised. Failure to do so may result in injury or death.

On the belt, tesioner, etc.... Invest in a (about $10) stethoscope so you can listen to the different pulleys, shock, etc. to determine the source of any unusual noises. Also pay attention to the fan bearing bracket. It is an aluminum casting with a bearing and hub (that the fan mounts to). That bearing can go bad also.

Have fun !!!!!!!!!!