I have a 2010 Hyundai Elantra Blue with man trans, and I have a significant vibration in my steering wheel when cruising at above 50mph. It will put my hands to sleep after about 1/2 hour of driving. I had tires/wheels force balanced - but no change. Funny thing is that, when I push in the clutch and coast - the vibration goes away. I know it's real since I have a 2010 Elantra GLS with auto trans and no vibration.