Have done some investigating since first post. I removed the starter and in doing so noticed that one of the long bolts holding it on was very lose. So much so that I could move starter before trying to remove it, not good. When I looked into starter opening I saw some teeth half flattened and metal shavings. I rotated the engine by hand and saw other places like this on the ring gear. I then checked the bolt and the threads had stripped over but the threads in the cast housing are OK along with the other bolt and it's threads. I can only assume that the bendix gear had gotten cocked from all the torque from starting and was not truely lined up when trying to engage into the flywheel and caused the damage in the ring gear teeth. On removing the starter I now have a bendix that is engaged over it's drive gear, (unwound), and cannot see that gear to tell if it in fact is also bad. How can I wind that bendix back to reveal gear and put it back into it's normal state for reassembly? Otherwise I am going to start to follow Zane's description and seperate my first N. This 8N has I beleive to be a step up trans with shift lever coming out the left side as from the drivers seat, below the battery. When seperating tractor what shafting, if any, is inside that needs to be disconected to get gear on, (I'm assuming the ring gear is a one piece gear)? Major operation for me but has to be done to replace ring gear. Is there any aligment required both in location and radially for the ring gear? Does it just bolt onto flywheel? And for the bendix/starter I hope nothing is required to align it. As far as I know there's a pilot hole that the starter goes into and the two long bolts line up and it's mounted. Would there be any radial or other location alignment required for starter/bendix? May have to get new bendix but that is to be yet determined.
Thanks again for all your help!