General Info

R&J Manufacturing Co R&J Manufacturing Co Leak Test Seals, Electrical Test Connectors, Jarcon Connectors, Urethane Pallets and moreR & J Manufacturing Company opened its doors in Clawson, Michigan, over 40 years ago. Through our commitment to manufacture high-quality items, at competitive prices, our company has gained the size, experience and skill necessary to meet the challenges and needs of a global market place.General Motors, Ford and Chrysler have all come to trust R & J to provide durable custom seals for engine and transmission testing. Navistar, Mazda, Jaguar and Caterpillar are also among our growing customer base. As well as OEM companies, such as Progressive Tool Company ( PICO ), Aaron's Automotive, Williams Technologies and Assembly Testing & Technology are also found on our expanding customer list. In addition to seals, we also design and manufacture custom Electrical Test Harnesses used to connect the engines and transmissions to the electronic test equipment. These harnesses permit the technicians to test these units before they are installed in the vehicles, enabling the manufacturers to provide high quality vehicles for their customers.