My 73 plymouth is very loud on bumpy streets. Very loud slapping and banging sounds from the front end. I rebuilt the front suspension a few years back. However I followed the repair manual and it did not mention anything about marking the position of the torsion bars. I put them back in the same positions ..just not in the same location in the frame. I reckon they were worn out anyway and plan to install new bars next summer. I changed the transmission mount as well. Are there any other things I could look at. Would worn motor mounts cause these loud bangs? Dont even enjoy driving the car anymore. Smooth streets are hard to come by where I am.