The steering stabilizer is a shock absorber mounted horizontally in the front suspension of a truck or SUV to help reduce harmonic vibrations in the suspension. Just as with regular shock absorbers, the stabilizer has a hydraulic fluid chamber that absorbs the forces exerted on it, minimizing the vibration transference. If this fluid leaks out because of a failed seal, the steering stabilizer will fail and need replacement. Anyone with a mind for auto repair can check a steering stabilizer for signs of failure in a matter of minutes.
Climb under the front of your truck or SUV with the flashlight, brake cleaner and rag. The steering stabilizer is positioned horizontally across the frontmost part of the suspension; it looks nearly identical to a regular shock absorber.
Shine the flashlight on the steering stabilizer and look for any signs of wetness on the center tube or extension rod. Automotive fluids such as hydraulic oils attract dirt, so also check for any areas covered in more dirt than the overall stabilizer exterior.
Touch any wet or seemingly dirty areas to see if they feel oily. If you detect any oil in the suspected leak residue, your steering stabilizer has failed. Clean the stabilizer with brake cleaner and a rag to remove the residue.
Drive the truck or SUV for 20 miles and then perform the preceding steps again to double-check your findings. If the steering stabilizer is leaking, the wetness will return during the road test.
