Bahah i didnt like how I worded that. For simple folk talk the crawl box shift rail hits one of the rails on the rear case which allows it to pop out or not want to go into a gear. You can avoid this by shifting in a certain pattern but they tend to want to pop out. If you just cut which ever shifter sticks out furtherst or both then it will keep them from hitting and should solve the problem. If not I have no clue why it would do it but I would check if the shift for and all the junk is in correct order because mines flatt bellied and makes horrific sounds like it wants to pop out but never does.