Lyle,
I went thru 2.5 cans of yellow so far, and about 1.5 cans of white. I figure about 2-3 cans more of the yellow to finish.
The gasket between the trans and rearend has one side that is sticky. This helps to keep the gasket in place when installing it. I did not use any other sealer on this gasket. The original seal lasted 31 yr with out it I figure if I get another 30 yrs I will be doing good lol