Alright, I just replaced my rear driveshaft u-joints maybe 500 miles ago, and I know the carrier bearing is fine. But I have a new squeeking sound from under the truck. It doesn't sound like it's coming from the front end, and it will only squeek if I've been driving around for a while(maybe 1hr). It doesn't matter if I'm turning, accelerating, slowing down in gear, or coasting. It still squeeks, but only if it is going under around 10MPH. Has anyone ever run into this problem before?

 

Spray a little lube on the rubber bushing between the two u-joints on the front drive line. I just found the same type of squeek two days ago.