So this morning I get in my truck and drive to work and my transmission is shifting very hard from first to second and into third gears. Does anyone have any idea what my be going on? It just started this morning. Just drove it to San Diego and back to Bakersfield with no problems and put about 550 miles round trip this weekend (no towing). My truck is a 2000 Chevy 3500 dually. Help a brother out cant be without my tow rig. Truck has about 118k on it. No slipping no loss of power just shifting really hard.