Make sure your Corvette Rear Half Shaft U-Joints in place. You'll need 8 of these if you are looking to replace all of them on your Corvette.
Tech Note: These Retainers are held in place with a 5/16" bolt and if you use a non original one, make sure it's a grade 8 bolt and tighten about 25 ft-lb and use lock tight type material on bolt. Still made by GM so they are original and very strong
Learn more from the following Mid America Motorworks Knowledge Library article:
Replacing Corvette U-Joints