I have a 1993 GMC RCSTB (regular cab stepside box) It is equipped with a 5.7l with the 4l60e (as far as I know.) It's a factory conversion truck by Tiara. It had a shift kit or performance tune to the transmission and an aggressive tune on the engine. Today I pulled in to my brothers and it started screeching while I move. He happened to be outside and told me it was coming from the back passengers side. We pulled the wheel and low and behold the pin that holds the parking brake to the shoe fell out. I saw no sign of it having rubbed anywhere. My brother thought the clip ground itself to oblivion on the drum and that was the noise with the remaining of it falling out when we pulled the drum. I wasn't convinced. After putting it back together and placing the truck in neutral I spun the tire. A slow screech came out of the transmission's tailshaft. It sounds like the output shaft bearing is dry but the fluid was up. I drove it half a mile home and it was terrible. It sounds like a dry bearing screech.