Any suggestions on what is going on? i have a 2003 yukon that sits in my front ard now. i was driving it an went to take off when the rear end popped and stopped moving. so we let it sit for a little got back in to drive away and it will go but it has a very loud clunking sound hard shifting. and now it wont even go into drive or 2nd gear it wont move but in 1st gear it will move just a little cuz soon the nose comes too