Sooooo.... turns out my transmission wasn't my problem... Well, it is, but it's only part of the problem...
When I went to move my rig behind the fence today, I rolled down to the street (driveway is an incline, where my Jeep is parked is rock) to get somewhat of a running start up the gravel into the back. Well, everything just bound up... When I tried to reverse more, it popped. And it popped again... and again... Going forward it did the same thing. Popped the cover, and my ring gear had some noticeable damage. Then I look at the pinion gear... DUUUUUDE
It's shredded! It was fine 4 or 5 months ago when I had the cover off, I don't have the slightest idea how this could have happened... So all the noises/vibes I've had have simply been the rear, and probably my f'd up tranny too.
I talked to my buddy who did the gears (Well, he had another guy at the shop do them), and he's asking me all these questions, if I've had the carrier out for any reason, ever had the pinion nut off, etc. And no, never done any of that. He says he'll "probably just have to warranty it", but I'm already thinking because of the questions he's asking, he's going to try and find a way out of it.
So I grabbed my front DS out of the shed, and I'll slap it in there tomorrow morning and weasle my way behind the fence, and pull the rear out for my buddy to take a look.
I could keep going, especially because I feel like venting because EVERYTHING seems to go wrong at the worst times... But I'll stop for now... Pics will come in the morning...
Good part of all of this is that when my rig is finally road worthy again, my drivetrain from the tranny back will be cherry!