I have a creak in my steering, specifically when I back up, and start moving forward turning to the right. After that initial sound, it never happens again until I let the car cool off. I suspect its my ball joints, and I've been quoted $300 for the install by 3 different shops in my area - seems a little pricy to me! Does this sound right? I'm tempted to ignore the occasional sound, or just start fresh with a Mach 1.