System: suspension; i-beam; solid; front spindle; knuckle.vehicle description: medium duty trucks with gkn front axles.note: if your vehicle IS presented to an authorized dealer on an agreed upon service date and the remedy IS not provided in a reasonable amount of time and free of charge or the remedy does not correct the defect, please contact freightliner at 1-503-735-8000. Also, contact the national highway traffic safety administration's auto safety hotline at 1-800-424-9393.