So I was having this scratchy sound when at speeds where I'd be in 4th or 5th gear. This noise would only happen when I applied my foot even the slightest to the throttle. I changed the t-case fluid, and the tranny fluid. Now, when I drained the tranny fluid, it was sulfured (eats at synchro), had water in it, and had a good bit of metal shavings in it. Even with this, the ride is now MUCH more quiet and smooth. BUT, in 5th gear I'm getting the same noise, nut not in 4th. Did my gear bite the dust?