I have a 2000 GMC Sierra with rear disc brakes. I replaced the rear pads, not realizing that both rear calipers were stuck (I could push the pistons in with a C clamp, but with difficulty.) I drove it that way, and was a few miles from home before I realized the brakes were dragging badly and smoking and burning, and the further I drove the tighter they got. They were dragging so badly that the truck had difficulty getting up to highway speeds.
I made it home, figured out what was going on, and replaced both rear calipers and the burned up pads. The brakes are fine now, but I caused another problem. Now there is a roaring/rumbling noise like a worn bearing coming from from under the truck. It sounds similar to knobby tires or a rough road surface, and it gets louder with speed.
My question is, what was most likely to wear out from the rear brakes dragging badly and getting very hot at highway speeds? Something in the rear differential? A rear wheel bearing? The transmission fluid does not smell burnt.
Thank you very much for any and all advice!