Highway Speed Vibration Diagnosis
WARNING: This page is about a different car, the 2004 Suzuki XL-7, 2004 Suzuki Grand Vitara, 2003 Suzuki XL-7, and 2003 Suzuki Grand Vitara. However, it is still accessible from the selected car via links, so may be relevant.
Wheel unbalance causes most of the highway speed vibration problems. If a vibration remains after dynamic balancing, it can be caused by three things.
- Tire runout.
- Wheel runout.
- Tire stiffness variation.
Measuring tire and / or wheel free runout will uncover only part of the problem. All three causes, known as loaded radial runout, must be checked by using a Tire Problem Detector (TPD). If a TPD is not available, the more time consuming method of substituting known good tire and wheel assemblies on the problem vehicle can be used.