The truck shakes a lot when going over bumps on the road , around 60 mph .
Excessive white smoke out of exhaust, especially with acceleration. smoke has a foul odor also. can hear a knocking sound in engine on deceleration (similar to bad wheel bearing hums), only does it if turbo is over 150-200 psi, but will do it every single time. 'drive to clean exhaust' displayed on dash. completed recommended drive cycle (over 30mph for at least 20 minutes, i drove for 45 mins) and message still appears. "wrench" symbol displayed on dash. per owner's guide the rtt displays when engine has defaulted to "limp-home" operation or when transmission problem has been detected.. the light comes on every time vehicle is driving now, and stays on entire time.