The Yukon O-ring is made for Dana 30 and Model 35 ZIP locker seal housing. (Part number YZLAO-02) 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.
O-ring for Dana 30 & Model 35 ZIP locker seal housing