My front end rattles (over some bumpy stuff) and sometimes will do it when I am turning to the right, like going around a curve. The going around a curve happens more in the morning, mostly when I am leaving for the morning, so right after I start it and go. I can feel all of it under the floorboard on the drivers side, not so much under my seat.

Also, this morning it start squeaking really loudly, for about a minute then quit.
Then all of a sudden, I hear a muffled pop and a light hiss that lasted for about 20 seconds. (thinking blew a seal)

Also, my indicator light for the 4X4 wont stay lit. I was told it was an old vacuum pump and the rubber is getting worn. But was wondering, if it doesnt indicate 2H when not in 4 wheel, does that mean it slipped to nuetral or did it stay in 2H?