I have the same problem. I've been trying everything: put it 1st, 2nd, 3rd & 4th, then reverse and it grinds. I've the adjusted the push rod in, out, re-greased everything and it still happens. It's weird though b/c it doesn't do it at all if the car is cold. It's always after a ride around the block and when the car has is used for awhile. I feel your pain.
1969, X-44, Export Model, Hugger Orange, Std. Int., BC Rear(soon to be a BT 12 bolt), PDB, GMPP 350HO, M22 Supercase, SSM Lift Bars, AirGap, Holley 750, FlowMaster American Thunder Exhaust, FlowTech Headers
[This message has been edited by Judd (edited 11-19-2002).]