Sierra. Silverado; 9.50; 3.42 Ratio; w/o Limited Slip. A single complete drive axle assembly, used on vehicles that utilize dependent suspension systems, that includes a differential and drive axles to deliver power to the wheels of a vehicle in order to drive the vehicle. Axle Code ABDU,ABHP,ABLS. Drive Ratio 3.42. AXLE ASSEMBLY -. Beam Axle Assembly. DIFFERENTIAL carrier. Drive Axle Assembly. Live Axle Assembly. Rigid Axle Assembly. Solid Axle Assembly.