The M936A1 wreckers are designed for recovery of disabled or mired vehicles, and perform crane operations. The crane extends a maximum 18 feet (5 meters), elevates 45 degrees, and swings 360 degrees. It is capable of lifting loads up to 20,000 lbs. (9,090 kg). A second hydraulic winch is installed at the rear of the vehicle.  The front winch has 280 feet of cable with a 20,000 pound capacity.  The rear winch has 350 feet of cable with a 45,000 pound capacity.  The 936 is arguably the finest of all M939 series trucks.