Its the carrier bearing, take it to napa, buy it and have them compress it out, will come out to be like 50 bucks total. It's only 6 bolts.
-Disconnect the drive shaft to differential - Size 14's I believe,
-Unbolt the part that holds the carrier bearing - Size 17's I believe,
-Slide the whole driveshaft off, disconnect the big part from bottom part - Size 17 bolts I believe,
Take it to autozone buy the bearing like 35$ take it to Napa have them take it off and put the new one back on. and then your done.