Road Test

1. Drive the vehicle for at least 5 miles (8 km) at more than 50 mph (80 km/h) to remove any tire flat spots before attempting to evaluate the vibration condition.

2. Road test the vehicle at speeds within the same range in which the customer reported the vibration. Record the results in the Road Test record column.

3. Check whether selecting Neutral or whether gear changes affect the vibration condition. If the condition does change, a static engine/powertrain test should be run to ascertain where the condition originates in the engine and transmission assembly.