Today I was on the interstate going about 80. All of a sudden, something shout out of the passenger side wheel well. It did not affect the ride whatsoever so I assumed it was a rock or something. Once I got onto Houston's horrible roads, I noticed that every hit was louder and rougher than before (particularly when the passenger wheel hit a pothole or bump). As I made an attempt to reverse into a parking spot, the truck started shaking and eventually stopped, the wheel seized up. It freed right up when I put it in drive. Other than the rougher/louder ride, there are no issues with the truck in drive. Every time I put it in reverse, the same thing happens.
Im going to take it a part and have a look in the morning. Obviously Im going to look for whatever part I lost while driving but does any body have any idea what may have happened or what general direction I should look while I've got it apart?