Owners of 2013 RAM 1500 trucks equipped with Air Suspension 4-Corner and built before February 5, 2013, may experience a rough ride when driving at a constant speed above 62 mph in Aero mode. Currently available updated software will change the ride height in Aero mode from -27mm to -15mm. This requires reprogramming the ASCM (air suspension control module) with the latest available software.