Gear clash logic

A system for selectively engaging and disengaging auxiliary equipment to avoid gear clash in a vehicle, the system comprising:

• a transmission having an output shaft selectively interconnected to a plurality of gears by at least a first torque transmitting device and a second torque transmitting device in order to establish a plurality of gear ratios at the output shaft;
• a transfer case having a plurality of transfer gears coupled to the output shaft and selectively coupled to the auxiliary equipment;
• a transmission controller in communication with the first and second torque transmitting devices, wherein the transmission controller includes control logic comprising:
• a first control logic for determining a change of mode request;
• a second control logic for engaging the first torque transmitting device and the second torque transmitting device to lock the output shaft;
• a third control logic for disengaging the second torque transmitting device;
• and
• a fourth control logic for engaging the second torque transmitting device and disengaging the first torque transmitting device to allow the output shaft to rotate.