Bad transfer case?

[tractor]

Hi, thanks for approving my membership. I recently purchased a 2011 35d, and flew out and drove it home (about 1,500 miles).

It did great the first 800 miles, but then at about 70 MPH, while on a decline, the car suddenly jerked and pulled to the right. No lights on the dash, but I reduced speed, and got to the right lane. I saw an exit ahead so decided to get off, and it did it again on the offramp. However this time the traction control light flashed for a second. My foot was off of the accelerator pedal both times.

This was a pretty violent jerk to the right, almost as if only the right front wheel was braking for a second.

I decided to disconnect the AWD by removing fuses 92 & 125 in the 'trunk'. Of course all the warning lights came on about me not having ABS, TCS, etc.

I tested it in a safer area to see if it did the jerk again and it didn't. Continued on home the rest of the way with zero problems, although the cruise control being inoperative was a bit inconvenient. haha

On the list to do, even before I picked it up, was to change all the fluids. So I've got transfer case fluid, transmission fluid & filter, and both diffs to change soon. But I'm worried that won't be the fix. Thinking back I did notice a scraping sound on the front left wheel when I turned it when backing out of a parking spot. It sounded like it was rubbing up against the wheel well liner. Since it was dark I couldn't entirely tell when I got out to look at i. Not sure if that's related to the other issue or not though. I've done some searching, and maybe I don't know the right terms, but I haven't yet come across this exact symptom.

Sorry for the long-winded post, but I wanted to provide the details.
Any ideas? Thanks.