New 6R140 Ford TorqShift Transmission. Ford's Six-Speed For The 6.7L Power Stroke. Courtesy of Ford Motor Company Photographer Mike McGlothlin Writer Apr 01, 2010. See 1 Photo.

Managing the increased horsepower and torque is the all-new 6R140 heavy-duty TorqShift six-speed transmission, which delivers power quickly and seamlessly while maximizing fuel economy.

While the 6R140 transmission in your Super Duty behaves like any autobox relative to its age and the condition of its ATF, there is an issue with an undersized O-ring on some filters.

Ford is recalling 3,976 of its largest pickup trucks for problems with the transmission. The issue affects 2015 F-250, F-350, F-450 and F-550 trucks, equipped with either a 6.2-liter gas or 6.7 ...