Yukon Zip Locker for Dana 60, 35-Spline, 4.10 & Down RCTB300WJ Leave it to our field-testing

Leave it to our field-testing to find every weakness in a factory design

Reflective Printing For Increased Visibility

Whether you're trying to protect your XJ from damage on the trail or need to cover up some existing trail boo-boos

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Staggered piston sizes to minimize pad wear

Yukon Zip Locker for Dana 60, 35-Spline, 4.10 & Down RCTB300WJ Leave it to our field-testingThe 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. Fits Dana Spicer 60 with 35 spline axles 4. 10 and down ratio only Forged case and 8620 internals for added strength Works with a variety of air delivery systems Assembled in the USA Technical Notes This is a narrow case locker. If you have a