GM–Ford 6-speed automatic transmission


The GM–Ford 6-speed automatic transmission is an automatic transaxle originally designed for transverse engine applications in cars. With design work having begun in 2002, General Motors and Ford Motor Company jointly committed to investing US$720 million in their manufacturing plants to support the new transmission. Each company has named and manufactured the transmission separately.

Manufacturer

Ford

Ford has built the 6F50 and 6F55 along with the 6F35 at its Van Dyke Transmission Plant in Sterling Heights, Michigan, and later at Sharonville Transmission in Sharonville, Ohio.

General Motors

GM has built the 6T70, 6T75, and 6T80 at Warren Transmission in Warren, Michigan with production starting in July 2006.

Models

Ford has claimed that the 6F50 is designed to handle 300 hp and 280 ft·lbf, while General Motors has rated their 6T70 to and, the 6T75 to and, and the 6T80 to and. GM has listed the wet weight of the 6T70/75/80 to be between.
Ford has apparently not made a public statement regarding the 6F55's maximum capabilities, but has used it in AWD in the Taurus SHO with an engine rated at and of torque, as well as the tenth-generation Lincoln Continental with an engine rated at and.
The first application of the technology was in the 2007 Ford Edge and Lincoln MKX crossover SUVs, as well as the Saturn Aura sedan and the Saturn Outlook crossover. It was also used for the Pontiac G6 GTP models and the GMC Acadia models for 2007.

Design

123456RFinal drive
4.4842.8721.8421.4141.0000.7422.882.44, 2.77, 3.16, 3.39

Prior to 2009, this transmission had issues caused by a very weak 3,5,R wave plate, which made this transmission prone to failure in GM products. 2009 updated wave plates were released for many clutches in 6T70. The old-design wave plates were not stress-relieved and could break with use.
ClutchPart Number
123424259063
2-624259816
3-5-Rev24254103
Low-Rev24259817

Applications

GM

Ford