I have a 2004 dyna low rider, I noticed this spring that the rear shifter arm is very loose, tried to tighten it as much as i could without breakin the bolt. It took some of the slack away but not all. Is it nessary to remove the primary to get the rear shifter arm off? I read on a site that the bolt may have stretched, and a new bolt would give a better sqeeze on the transmission shaft,,,,, Any ideas ???? come on guys i need some help,,,,,