Patent ID: 6973854

Claim:
An auxiliary gearbox of a transmission comprising: a piston housing having a first bore and a second bore; a first piston arranged within said first bore separating first and second chambers within said first bore, a first shaft extending from said first piston and connected to a first shift fork for selectively engaging a first auxiliary gear in response to actuation of said first piston; a second piston arranged within said second bore separating third and fourth chambers within said second bore, a second shaft extending from said second piston and connected to a second shift fork for selectively engaging a second auxiliary gear in response to actuation of said second piston; and first, second, and third actuators for selectively actuating said first and second pistons, said first actuator fluidly connected to said first chamber, said second actuator fluidly connected to said second and fourth chambers, and said third actuator fluidly connected to said third chamber, wherein a desired gear set is obtained by pressuring three of said first, second, third and fourth chambers, wherein said actuators are solenoids supported on said piston housing.