General Motors Corp. says the eight-week strike at American Axle and Manufacturing Holdings Inc. has forced it to cut production at two more factories.GM spokesman Dan Flores says the company on Monday cut one of three shifts at an Oshawa, Ontario, factory that makes the Chevrolet Impala and Buick Lacrosse sedans. It also cut production of four-speed transmissions at a factory in Michigan's Ypsilanti Township.