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Ford Tweaks Six-Speed Transmission for 3.5L Fuel Efficient engine

April 20th, 2009

2010 Lincoln MKSFord introduces its 3.5 EcoBoost V6 engine this spring. This environmentally-friendly is coupled by a six-speed 6F-55 SelectShift automatic transmission that’s been configured to meet higher torque demands of the new twin-turbo direct fuel injection engine.

Both technologies will be available in Ford’s 2010 Lincoln MKS (see pic!). The 6F-55 transmission was developed from the successful blueprint of Ford’s 6F-50 transmission. Compared to the 6F-50 transmission, however, the 6F-55 is bulked up and strengthened to work with the EcoBoost V6’s architecture.

All changes were geared towards improved power and fuel efficiency. The modifications included friction material grooves that break up fluid flow and reduce clutch drag losses; nine wave CBLR; improved calibration measures; and a 15-degree-increase of start-to-open temperatures.

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