Eaton ELocker4 Differential Dana 70 35 Spline 4.56 & Up RatioThe Eaton ELocker is an electronic, selectable differential designed for drivers that need traction on demand. At the flip of a dash switch, drivers can go from open to 100 percent locked. A second flip of the switch deactivates the unit to resume normal driving. The direct acting mechanism activates in . 14 second to provide 100% instant axle lock, and remains locked in both forward and reverse. 4 Pinion Net Forged Gear Design For Max Strength And