Smooth driveability and reliability depend on having a driveshaft and universal joints in good working order. A Mustang's driveline is something you want to know is there without being able to feel it.
When the driveshaft and universal joints, or U-joints, are felt and heard, it's usually bad news. These quality, replacement style universal joints connect your fox body Mustang's driveshaft to the rear end pinion yoke and will get your driveshaft turning smoothly again. Sold as each.
I have been ordering items from Latemodel Restoration for many years. I've found them to be exceptionally professional, timely with order processing and shipping correct items ordered. I've never received an incorrect item on an order.