To acheive pivot steer, the T-bar must be pulled either right or left to its full travel limit, which will fully lock one track or the other. When the driver turns the T-bar, one side or the other will progressively brake, turning the vehicle. When the driver presses the brake pedal, the series of plates on both sides will compress into one another, thereby creating friction and braking the vehicle evenly. They will work in both forward and reverse. These clutches are nothing more than a series of pressure plates,controlled by bearing interfaces to slow/stop the drive/power shaft /gear for each final drive. The transmission is designed with variable speed reduction clutches (for steering and braking), which are hydraulically actuated in response to driver input throu a steering cable, and a brake cable. Detroit Diesel Allison is the tranny manufacturer.
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