A few weeks back I got a bad ticking noise coming under the truck. I suspected a bad flex plate and to my surprise I found all of the tanny mounting bolts were missing /forums/images/graemlins/blush.gif /forums/images/graemlins/smirk.gif(typical of my truck) Anyway once I replaced them all with lock washers and locktight the noise went away. Now my truck makes a noise I've never heard before. It drives normally but as soon as I step on gas a little bit it makes a grating noise that will eventually go away. Kind of like a tray full of gravel being shaken from side to side. It started making this noise after I replaced my carb with an Edelbrock so I had to redo the detent cable adjustments. I was able to smooth out the shifting by throwing a little slack into the cable. It didn't make this noise til afterwards. But I climbed under truck and was able to duplicate the noise just by revving the motor up really quick and sharp. It's coming right from the flexplate T/C area. So I think I can rule out the tranny being bad. Anyone have a better idea as to what or why????