Lionelzwl2012 posted:maybe this question should be in another post,but I ask it here. I have several hidden uncoupling tab trucks where the coupler pops open at random. is there a fix? I was looking forward to the new truck myself as they play well with my manual uncoupling tool. oh well guess the hidden tab majority won out.
I believe that is a manufacturing/design issue where the tab cannot return far enough forward to firmly prevent the knuckle from opening. If you lightly file the tab where it hits the stop that may solve your problem.