I just purchased a new Ripper shifter. During my first test run, I am noticing a vibration coming from the shifter area. The only thing I can think of is the stock rubber boot doesn't mate over the shifter very well. Do I have to cut the stock boot to allow it to fit over the base of the ripper shifter. Also, there is a pin in the front of the stock shifter, there is no place on the ripper shifter for this pin. Did you guys leave the pin out? Also, where do you think the vibration is coming from if it is not the boot as described above. Any help would be much appreciated.