1993 Suburban making squeeking noise at rear-end area

I have a 1993 Suburban 2wd with a 5.3 motor. It making a squeeking noise around where the driveshaft connects to the rea-end. It doesn't make the noise in reverse at all. Also when you lift it up it doesn't make the noise. When you drive forward it make a (eaa eaa) noise, kinda like rubber against metal. It gets faster as you drive faster. It has also been doing it for about a week now.
Please advise