8 3/4 grease leak .

Dartnut said
Hmmm.
Then a new seal won't do it then.
Honestly, i've never seen one leak through the splines and past the washer and nut before if everything is tight.
And if the nut isn't tight, then the yoke would wobble and wreck the seal anyway.
Pictures would go a long way here........

toolmanmike said
THen he needs to put some silicone on the splines. Never heard of that happening. I wonder how sloppy the yoke is on the pinion splines?

It happens, just like a balancer can seep oil through the crank snout.
Still, checking the nut first would be a good move.:D