Allison Transmission, Inc.

Larry E Boley

Rick Daugherty

Bruce E Crum

James Priest

Michael R Toole

James R Priest

A vehicle drivetrain for a vehicle including a transmission configured to move the vehicle with a surface engaging traction member and a final drive assembly configured to drive the surface engaging traction member. The final drive assembly includes a drive assembly coupler. A transmission coupler is operatively connected to the transmission and disposed between the transmission and the drive assembly coupler. The transmission coupler includes a first position engaged with the drive assembly coupler and a second position disengaged from the drive assembly coupler. An actuator is operatively connected to the transmission coupler and is configured to move the transmission coupler between the first position and the second position. The actuator, in one embodiment, includes a worm drive having a worm gear configured to move the transmission coupler along a longitudinal direction of the transmission. The worm gear rotates about an axis inclined with the longitudinal direction.

Final drive disconnect mechanism via transmission

A torque converter for a powered vehicle, the torque converter including a cover coupled to an engine, and a piston moveably coupled to the cover to define a lockup cavity. The torque converter includes a converter cavity and an exhaust valve coupled to the converter cavity is configured to exhaust the converter cavity and lockup cavity of oil when the powered vehicle is placed in neutral or in park. A passage located in the cover enables oil located in the lockup cavity to move to the converter cavity to substantially eliminate oil located in the lockup cavity when the powered vehicle is placed in neutral or in park.

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Indianapolis, IN, United States of America

Larry E Boley