Can control arms make noise?
There are many signs of a failing ball joint or control arm bushings including: Clicking, popping, or snapping sound when the wheel is turned. Eventually, the clicking and popping can turn into a squeaking sound at the end of a stop, when the gas pedal is used, and/or when turning the steering wheel. via
Do I need a new upper control arm?
Your control arm or upper cradle as it's sometimes called determines wheel travel, suspension durability, and wheel alignment. If you're making any sort of suspension modification at all, replacing the upper control arms should be considered but may not be necessary. via
How do you test lower control arm bushings? (video)
Should you replace both upper and lower ball joints?
A: Plenty of mechanics will recommend that you replace both the upper and lower ball joints at the same time. They may also recommend checking related components at the same time, such as the stud hole in the steering knuckle. via