the shaft you mention is actually a shaft with in a shaft.
The TV shaft is inside the shift shaft. There is a seal in the middle on the TV shaft. It can be replaced without removing the pan. Remvoing the nut that retains the lever and the seal is right there.
if the seal for the shift shaft is leaking, then you can some times dig the seal out nd replace it. Or remove the pan and valve body to get the shafts out and replace the seals to avoid cutting them doing it the short cut method
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Some people are like Slinkies... Not really good for anything, but they still bring a smile to your face when you push them down a flight of stairs.