trans gear selector shaft seal

[resq302]

On a 69 Plymouth GTX 727 trans, I have a trans leak coming from the vertical gear selector shaft where the shift linkage connects to and goes inside the trans. Is the seal accessible by dropping the trans pan or is it something that you need to drop the entire trans to repair?

 

[Basketcase]

a buddy of mine has changed the seal this way by dropping the pan. I've never messed with automatics, so i don't know what all is involved. But he's done a couple in my Power Wagon's over the years.