This is on my 97 PSD Started out with a grinding noise only in P R D 2 or 1. No noise in neutral. Now I've got a horribly loud grinding noise in all gears, so loud that I am thinking it is eternal to the transmission or torque converter. So I am thinking flex plate? The truck drives and shifts fine, although I'm not driving it anymore until I figure out what that noise is. If I pull the inspection cover will I be able to see most of the flex plate while rotating the engine by hand?