If it just one side that is breaking then look at the opposite side assembly to see how it is configured.Does anyone know the correct placement of the lower glass channel on a 33, 3 window ?? My glass has broken twice already. It's the channel that goes on the glass with the rollers.
Generally glass will not break unless it was improperly bedded in the channel or is making contact with bare metal somewhere.I changed everything I ordered the glass from Old Fords so it is original size. The first one broke from the glass channel when the door was being closed. The second one broke while driving from the front side and then up All new felts new regulator new glass channel