Eaton E-Locker Dana 44 Differential, Rear 30 Spline (3.92+) 19969-010 For Use With 30 Spline Axles;For Use With 3.92 And Up Gears;Electric activation; Switches From Open To Full Spool;Improved 4 Pinion Spider Gear Design For Added Strength For Heavy Duty Applications Eaton Eaton Dana 44 30 Spline 3.92 Up 4 Pinion E-Locker - 19969-010 19969-010 Differentials