Yukon Gear Seal Housing For Ford 10.25in & 10.5in / Zip Locker / w/ O-Rings - YZLASH-05

The Yukon Zip Locker is the latest in on-demand traction. Its air-operated design allows you to switch from an open differential to 100% lockup when you need it, giving you the ultimate in driver selectability.
Installation Instructions
Installation Instructions