I DON'T THINK I CAN HELP YOU WITH THE POPPING OUT OF GEAR, BUT TO FIX THE GETTING STUCK. WHEN DOWN SHIFTING YOU ALMOST NEED TO GO FORM 3-2-1, DON'T JUST GO 3-1. I HAVE HAD THE SAME PROBLEM WITH MY 53 AND I RARELY HAVE A PROBLEM WHEN I GO 3-2-1.
I HOPE THIS HELPS.
