- The Turbo-Hydramatic 125 was the first in a line of automatic transmissions from General Motors designed for transverse engine application.
- Introduced in 1980, the line evolved into today’s 4T40/45/65/80 line.
- The 4T60-E (and similar 4T65-E) is a series of automatic transmissions from General Motors. Designed for transverse engine configurations, the series includes 4 forward gears.
- The 4Txx family is an evolution of the original Turbo-Hydramatic 125 transverse automatic introduced in the late 1970s.
- The “-E” transmission is electronically controlled and features an automatic overdrive transaxle with an electronically controlled torque converter clutch.
- The 4T65 is built at Warren Transmission in Warren, Michigan.
- General Motors and Ford Motor Company cooperated in 2002 to create a new automatic transaxle, designed for transverse engine applications in cars.
- The companies jointly committed to investing US$720 million in their manufacturing plants to support the new transmission.
- Each company will name and manufacture the transmission separately:
- Ford builds the 6F50 and 6F55 along with the 6F35 (related to the GM 6T40 transmission) at their Van Dyke Transmission Plant in Sterling Heights, Michigan, and in the future at Sharonville Transmission in Sharonville, Ohio.
- GM builds the 6T70, 6T75 and 6T80 at Warren Transmission in Warren, Michigan with production starting in July 2006