Patent attributes
A six-speed automatic transmission for a vehicle includes a transmission housing, an input member, an output member, three planetary gearsets for changing a ratio of torque between the input member and the output member, clutch assemblies to selectively couple the input member to predetermined members of the planetary gearsets, and brake assemblies to selectively couple predetermined members of the planetary gearsets to the transmission housing. The transmission achieves an improved gear ratio spacing and, correlatively, enhanced vehicle drivability, performance, and fuel economy, by respectively permanently coupling the planetary carrier of the first gearset with the sun gear of the second gearset, the annulus gears of the first and third gearsets with the planetary carrier of the second gearset, and the output member with both the annulus gear of the second gearset and the planetary carrier of the third gearset.
