A0229979548 is an O-Ring Seal used in Detroit Diesel engines, specifically for the Range Control Valve. Here are some detailed specifications: Material: Typically made from fluorocarbon rubber (FKM) for high durability and resistance to extreme temperatures and chemicals. Dimensions: Approximately 15.5 mm inner diameter and 4.5 mm thickness. Application: Ensures a reliable seal in the transmission system, preventing leaks and maintaining smooth