The Auto-PosiLift™ combines the proven CBX PosiLift™ components and a Meritor WABCO ABS with unique built in functionality to create automatic lift axle operation. The system is programmed to read the air pressure in the tandem slider suspension’s rear axle air springs each time a delivery or pick-up is made. Without driver interaction, the system determines to automatically raise the front axle or keep the front axle in the down position. The CBX40 with Auto-PosiLift™ was initially developed for multi-stop beverage distribution fleets; other varying load fleet operations such as LTL (Less Than Truck Load), fleets back hauling empty, and food service may also reap the benefits of significant fuel savings, reduced tire-wear, and reduced toll charges.