A few things come to mind.

Look for cracked vacuum hoses / bad motor mounts. ( especially the air intake between the air flow sensor and throttle body.) The engine rolls the other way in reverse and this might open a cracked hose.

I'm not sure if it possible on the .6 but, some transmissions can apply the torque converter clutch in reverse / lower forward gears stalling the engine. When this occurs, it is a very hard bang when you move from neutral to any gear.