ACDelco Gold (Professional) Universal Joints are the high quality alternative to Original Equipment (OE) parts. These universal joints help transmit power from the transmission to the rear differential through the driveshaft, allowing for vertical movement of the driveshaft during its rotation. ACDelco Gold (Professional) parts are manufactured to meet your expectations for fit, form, and function, making them a smart choice for General Motors vehicles, as well as most makes and models, including special applications. These high-quality parts are backed by General Motors. Some ACDelco Gold parts may have formerly appeared as ACDelco Professional.