A one-of-a-kind Viewliner dining car, car number 8400, was rebuilt with stimulus funding and restored to revenue service in October 2011, given the name Indianapolis . Originally a prototype dining car with experimental trucks built during the Viewliner design phase in the late 1980s, the car was completely rebuilt at Amtrak's Beech Grove shops and currently serves on Eastern long distance trains. Information learned from building and using this car was applied to the dining cars included in the new order of Viewliner II cars. 
Turboliners arrived on the Detroit run on April 10, 1975. Additional equipment allowed Amtrak to add a round-trip in late April; the arrival of a third trainset in May made Chicago–Detroit the "first all-turbine-powered route". After one year of operation, ridership on the corridor had increased by 72 percent. The fixed capacity of 292 passengers on an RTL trainset proved an impediment; Amtrak could not add capacity when demand outstripped supply. Amtrak replaced one of the trainsets with a conventional locomotive hauling then-new Amfleet coaches in 1976; Turboliner service ended altogether by 1981 as more Amfleet equipment became available.