If you feel the steering wheel try to jerk out of your hands when you hit bump it maybe time to change it. That's the best way I can think of describing it. The steering stabilizer help control the bump steer. Hope this helps.
2006 Jeep Wrangler Rubicon 4.0 6 speed, 3" lift , 33" Nitto Mud Grapplers, Warn 5k winch, snorkel, one crazy driver