[RedEye]

My TKO600 with about 900 miles on it had the 3rd gear falling out when I would engine break. After discovering a rear main seal leak, I pulled the trans and took it to a local shop. 150 bucks later, and the promise of their master mechanic that absolutely nothing was wrong with the trans, it's no longer jumping out of gear. So who knows, the gears looked great inside, and so hopefully the problem was solved.