i have a 98' Tahoe 4x4 with 173,000 miles on it. i had a groaling noise coming from the front drivers side when im in two wheel and when i put it in four wheel it gets even louder. i took out the front diff to see if i need to change the bearings. does anyone have a exploded view diagram they can show me and some pointers to disassemble it. i already have the axels out of it. need to see how it comes apart before i jump into it. thanks