M48A2s were widely deployed to both the US Army and US Marine Corps fully replacing the M47 Patton in combat units as well as being exported to NATO allies and foreign governments. In 1967 M48A2 tanks still in service with National Guard units were upgraded to the A3 configuration. The M48A2 hull received modified armored boxing around the taillights, an updated fuel delivery system and a tank infantry phone (TIP). The gasoline engine was replaced with the AVDS-1790-2A.They remained in CONUS training use with the Army National Guard through 1979.