Does any one know how the pinion gear is kept against the ring gear in a Banjo rear end? The rear end I salvaged from the junk was used for a trailer and the torque tube has been cut of about 18 inches from the bolt flange. I think there should be a bearing and maybe some kind of retainer. When I took the flange(portion of the tube) off the rear end has a tapered hole like it needs a bearing So..... Do i need a bearing among other parts?