I have a 2004 Colorado 4x4 crew cab w/ 65,000 miles on it. My brother was messing around and was shaking the truck bed/rear end side to side and I noticed a clunking sound. I checked the spare tire to see if it was loose or anything else and everything was tight. I put my hand on the passengers rear tire while he was rocking the truck and it is definitely coming from that area. I checked the lugs for tightness everything seems ok. Any ideas??? I'm thinking something is loose in the diff or the bearings. Has anyone else had this problem???
Any help would be appreciated.