Germany-based Schaeffler will spend $60 million to expand its Wooster transmission component manufacturing plant, where it already is the city’s largest employer. The investment will add 250 jobs to the facility’s current 1,767 employees. Schaeffler will add 91,000 square feet by 2017, including manufacturing space and office space. The Wooster plant designs and makes transmission system components, primarily torque converters, for original equipment vehicle manufacturers around the world. “We are thrilled to have Schaeffler expanding in our community,” Wooster Mayor Bob Breneman said in a statement. “Schaeffler is the largest employer in our city’s history, and has been an excellent corporate partner for our community.”