Officially named the M4A3(76)W HVSS, but generally known as the Easy Eight. At the end of August 1944, a new suspension was designed for the M4 series, allowing greater mobility as well as heavier armor. The result was a highly effective medium tank. The vehicle was mass-produced beginning in late March 1945, with a total of 4542 M4A3(76)W tanks with both suspension types manufactured.