The Richmond Gear instructions don't direct you to do this and I can't quantify/prove how important it is... but after the Lock Right install I left my truck's rear suspension (axle) elevated, started my truck and let the rear axle "drive" for about 5 minutes (with no load) in 1st gear to allow the gear oil to totally permeate the entire assembly to ensure all the surfaces were coated with gear oil BEFORE I took it out for an actual test drive.  The instructions direct you to coat the thrust washers, pin sockets and surfaces with gear grease to 'protect it during initial operation' UNTIL the gear oil gets inside to the parts to lube them... but it just makes sense (to me) to "break in" the lube thoroughly before putting full operating pressure on the diff assembly.  Gear oil is like molasses, even on a hot day and the cross pins and thrust washers are buried inside an enclosed differential case with pretty tight tolerances.  All else being equal, I thought i would mention this.