I'm interested because the same thing happens to mine. Do you have a lift? I do and always blamed it on driveline vibes. Hoping the sye/ds will solve it.
I thought about that, and it would make sense if the vibes were coming based on road speed (how fast the driveshaft is turning), but it's not. I get the same vibe in 1st or 2nd gear at about 2300 rpm at 20 mph as I do in 5th gear at 60 mph.
I know there is a chain in the transfer case, but I'm not sure how it interacts with the other components as far as if it drives or is driven in two wheel drive; But that is kind of what this vibe feels like.
To answer your question, I do have a 4" lift with a dropped tc skid plate. Haven't done the SYE yet, but my driveline angles all look good.
