In 1965, the Gundersons sold their company to the FMC Corporation. In 1973, the company became the Marine and Rail Equipment Division of FMC (MRED). In 1979, over 6,000 rail cars were produced. The following year the early 1980s recession began and many orders were cancelled and new orders plummeted; in 1982, only 25 rail cars were built. Simultaneously, new developments in rail freight transport led to new products, such as multi-platform articulated spine car sets for TOFC transportation of highway semi-trailers were built for the Itel Corporation. Also in the 1980s, the company developed "Twin-Stack" well cars for double-stack rail transport of intermodal containers in a joint venture with Greenbrier. The "Twin-Stack" double-stack car became an important product with approximately 3,000 being produced per year in 1990.