drink plenty of water dude....
drink up boy and then DONT go beat on your truck..... it had nothing to do with you getting sick.... lol
the front and the rear or the front diff?
well i would say that that the pinion seal is toast and caused all the gear oil leaked out and the grinding you are hearing is most likely the gears meshing against one another.... maybe even the pinion bearings as well.....
well dont put it in 4wd your doing enough damage just driving it when you have to..... dont wanna do anymore than you absolutely have to...... no sense in having to replace the gears if you dont have to..... it sucks ass tearing them down when you dont have to......
Did you even THINK about checking your fuc king fluid level?