My starter started acting up. It really acted and sounded like the old dodge starters on the 880's when the bendix started to fail. I inspected the flywheel its not cherry but not all that bad. Just a little wear so I ordered up a new starter drive. I found the ends of the pinion gear chewed off. so I replaced it and things worked fine a few weeks and now that it is - 15 the problem is back. I have a good idea what the pinion gear is going to look like again. Any off the wall ideas why the starter drive isn't fully engaging the ring gear. the starter appears to be the oe starter with the thermo switch bypassed. cat and Allison haven't been any help seems cat supplied the engines with a bell housing only and Allison supplied the transmission only with no adaptor kit to mate the transmission to the engine. as the cat 12 tooth starter works in place of the oe. leese navill I would assume the adapter kit is a cat part number but cat cant look it up with out a serial number or a part number. At this point I think getting a ring gear isn't going to fix the problem any way the problem is in the starter someplace.