Toyota Four-Speed Automatic Transmission with Overdrive
780097
2/1/1978
- Content
- A new four-speed automatic transmission with overdrive has been developed and put into production for the purpose of the improvement of fuel economy and the reduction of engine noise.The transmission has the following characteristics:Gear train arrangement having overdrive unit between the torque converter and the three-speed auxiliary transmissionHigh overdrive gear ratioShift feel controls for clutch-to-clutch shiftingOptimum shift points between third and overdrive gears on fuel economy, driveability and exhaust emissionsLockout system of overdrive gearThis paper describes the design features and confirmation testings considered to assure the reliability and durability of the transmission.It also refers to effects on fuel economy and noise of the transmission in the vehicle.
- Citation
- Numazawa, A., Kubo, S., Shindo, Y., and Moroto, S., "Toyota Four-Speed Automatic Transmission with Overdrive," 1978 Automotive Engineering Congress and Exposition, Detroit, Michigan, United States, February 27, 1978, https://doi.org/10.4271/780097.