So while driving back to Denver from Boulder today I heard a loud clunk from the rear end and noticed some considerable resistance as if the brakies were on. I immediately got off and when I slowed down to about 25mph the rear wheels locked up and I squeeled to a halt. After stopping the wheels unlocked and I was able to pull in to a parking lot but I could feel the rear wheels binding up and barely releasing as I drove it. Now Im pretty sure its the rear diff becaused when I got out the rear diff was smoking pretty badly and was very hot. My question is shiould I just count on having to replace the diff or should I start looking for a whole new rear end? I noticed there was oil dripping out of the wheels around where the lugs are. WHats that about?I knew I shouldnt have bought a used diff from the yota yard, I shouldve dropped the extra little bit of money for new stuff.