Ford Global Technolgoies, LLC

Juliette McCoy

Timothy Raphael Allen

Hong Jiang

Steven Gerald Thomas

Steve G Thomas

A motor vehicle powertrain includes a transmission producing multiple speed ratios, and a transfer case including a second input driveably connected to the transmission output, a second output continually driveably connected to a first set of wheels and releasably connected to a second set of wheels, for producing alternately in the transfer case a low speed ratio and a high speed ratio. A mode selector produces a signal representing a desired driving mode. A controller, responsive to the signals produced by the mode selector, controls the transmission to produce alternately the multiple speed ratios of the transmission, and for controls the transfer case to operate alternately in the low speed ratio and high speed ratio that corresponds to the desired driving mode and a current speed ratio produced by the transmission.

Transfer case having selectable driving modes suited to motor vehicle load and road conditions

In a motor vehicle driveline having an automatic transmission driveably connected to a transfer case, a park gear, continually driveably connected through a planetary gear set to the drive wheels of the vehicle, is alternately fixed against rotation on the transfer case or released to rotate freely in response to movement of a gear selector having a park position. When the gear selector is moved to the park position, a pawl holds the drive wheels against rotation. When the gear selector is moved from the park position, the drive wheels are free to rotate without restraint of the park mechanism.

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Macomb Township, MI, United States of America

Juliette McCoy