Just driving the other day and my transmission started making the worst noise I've ever heard in 3rd and 4th while accelerating. Thinking bearings may be finally going out at 190k 70k of those she's been carrying 39.5 iroks. I've heard of people rebuilding them themselves, but I've heard nightmares about breaking teeth on the 5th drive gear.... Fluids new, no metal shavings that I can tell.. Need opinions, horror stories, and