Yea I would think so. Here's the quote, sounds like a design flaw that was changed. I had leaks in both sides before I rebuilt my axles, brakes were oily and dirty, surprised my ABS sensor worked at all.
Some Salisbury axles were manufactured with poor oil drainage
between the axle tubes and the differential housing. This can
often result in one of the axle tubes filling up with differential oil
while running. In most cases this will result in a blocked air vent
which will cause the differential housing to pressurize and expel
oil from the axle seals at the wheels or force oil into the air
system of the Air Locker, eventually expelling oil at the solenoid
valve. This is a design flaw which was corrected by most
automakers in the later releases of their axle assemblies. If no
lower drainage point is present in the differential housing then it
is critical that you modify the housing to include one.