[Fot] TR4 Pinion Oil Seal

[Dennis DeLap]

A  M  I  C  I
After all of these years I just noticed that Moss lists two
different oil seals 
for the TR4 rear end pinion.
One for the IRS diff and
another for the solid axle.
Does anyone know what the difference is?
The seal
that I use measures 1.500x2.687x.500 - not even sure which one it is.

Dennis