The Mustang Pinion Seal is known to leak, but sometimes it's not the Pinion Seal causing the problem. Many times, the Mustang Pinion Flange or Driveshaft Flange has a groove worn in the seal surface causing the leak. The only way to remedy this is to replace the Pinion Flange. The Mustang Pinion Snubber keeps the Rear Axle from bottoming out to help prevent suspension & Driveline damage.
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.