hello there, i have a Whitfield advantage II, i have the classic signs of a worn bushing(thanks much in part to the numerous great minds within this forum) on the lower end of my auger motor. I replaced the auger but it is still jamming and making the sporadic squealing noises. Is it possible that my upper bushing is worn as well? Or is the auger motor on its way out too? Any help would greatly be appreciated.