Vic
After I have driven my Hot Rod Lincoln a few miles I have noticed a small amount of grease / oil on the floor coming directly from the clam shell where the grease is put in at the fitting somehow it must be the cork strips that you install in the the half clam shell it must be bypassing the seal and leaking out just a small amount nothing to worry. I have the 39 Zephyr transmission in my car. See a picture of the clam shell below also the movement of the enclosed drive tube up and down passing by between the clam shell and the tube.
Thanks
Frenchy