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. Zip Locker for AMC Model 35, 30 spline, 3.54 and up. Yukon Zip Locker is an air-operated locking differential that offers on demand traction. Features a forged case and 8620 internals for added strength. Includes carrier bearings M35 3.54 & UP, 30spl ZIP LOCKER
