I have a 03 Eddie Bauer Expy with 198K on it. Right after we bought it it started making a strange vibration occasionally when at speed. The best way to describe it would be driving over a cattle guard or road marker bumps on a highway. This was totally random and only lasts about 1/2 a second.
When I went on a hockey trip recently I had a PRNDL code come up and had to replace a relay. Luckily I figured out what it was and a parts store had one.
Well a week ago my son took it out to help a buddy get out of some sand. Long story short he put it in 4 low and did not know how to get it out. So naturally he drove it home, about 20 -25 miles, with it that way. I did get it out of 4L and have since instructed him on how to do it.
Fast forward to right after and it is making a grinding sound and vibration when turning to left. I have had it in 4H or 4L so I am not sure if it is doing it in those. Have not noticed it when not turning.
I took it to a shop and they told me a hub and differential and 1450.00 to do it. I am waiting on a second opinion right now. They mentioned something about the vacuum being messed up.
Does anyone have any ideas or suggestions? Thanks in advance.

 

I'm sure it's just the hub and the differential is fine.