Road Test

Before performing any work or testing, always road test the vehicle. Warming up the tires is necessary to eliminate any flat spotting. A road test is also necessary to determine the speed at which the vibration occurs. Low-speed vibration at speeds less than 64 km/h (40 mph) is usually related to runout. High-speed vibration at speeds greater than 64 km/h (40 mph) is usually the result of imbalance, but may be a product of both runout and imbalance.