I have a 2005 ram 3500 4x4 with an after market torque convertor (all billet triple clutch) that performes perfect, but every time i use tow/haul mode the check engine light comes on. The code reads (torque convertor overdrive siliniod performance). The light comes on at about 35 to 40 miles per hour and normally as it down shifts from third gear to second gear. Has anyone else heard of this?