I just found a great solution. Lucas' "hub oil". Found it at my local NAPA. Its heavy like gear oil, but, darn stuff killed the leaks but good!

from their website...
Lucas Hub Oil was formulated to stop leaks in steering axles and trailer hubs on heavy duty trucks. It also allows hubs to run on a marginal amount of oil in case of a blown seal or poor maintenance. It is an excellent gear lube for racing or heavy duty applications.

KEY BENEFITS

Slows leaks
Prevents downtime
Extremely heat resistant
Very long lasting
Attachments
lucashuboil - 1.jpeg (29.46 KB, 145 downloads)

Lee

1981 C10 "custom deluxe" stripper in white "Ralph"
Will work on any classic