- At William Cohen & Sons we offer a long-standing reputation for excellent customer service. Since 1950, our family-owned business has been the leader in the sale of used trucks, parts and thousands of related items. We offer one of the largest inventories of rears and transmissions on the east coast that includes a 24-hour turnaround on most units. Our on-site inventory includes a large selection of used and rebuilt gas and diesel engines. We take pride in the hundreds of customers that have been with us for many of our 50+ years in business. From our computerized warehouse inventory of over 20,000 parts, we can accommodate almost any need. Our exporting department ships parts throughout the world from anywhere in the United States. We offer complete containerization and preparation of your shipment at our facility. At our location, we have over 30 acres of trucks and parts including running trucks, trucks for salvage and trailers of all types. We have always offered a fast, efficient and clean operation staffed with knowledgeable, experienced and caring professionals. It is easy to understand why everyone considers us to be "The Truck Parts Store".