LI32.22-P-052062_Ver_1 PDF

A service bulletin that addresses a thumping noise issue from the front axle of a vehicle when driving over large road undulations. The document describes the complaint as a noticeable noise most pronounced over speed humps, caused by the rebound buffer spring action on the front axle. It suggests a remedy by flashing the AIRMATIC control unit and provides information on software availability for diagnosis. The bulletin includes details about symptoms, unit fault codes, and parts required for the solution.