8 3/4 grease leak .

I have changed the rear seal twice to no avail . Grease appears to be coming out (weeping) from the splines , leaking from behind the nut and washer . Is there a cure or are the splines wore allowing this ??? Thanks It's drivable but annoying ....
Pinion leak. A small bead of sealant usually keeps it in,can put it in yoke where splines end at the top,or under/around washer. I usually grease the spline, thats enough to keep it in for a while.
If you put silicone on the splined shaft before yoke goes on, you will need a puller to get it apart.
Check your vent as well.
And fill to 1” below plug. Running it rim full isnt necessary. If you look up fluid capacities,it will tell you how much it should have.