I would grab a new selector shaft and seal...
https://www.jegs.com/i/Sonnax/852/35...yABEgJLZPD_BwE
A new speedo drive kit is available also
https://www.classictransmissionsolut...iABEgK9zfD_BwE
Suggest you clean the dipstick very well with brake clean and spray the bottom of the stick with flat black paint...let it thoroughly dry ...
I find it makes it easier to read the levels....
Hope this helps...
Trans fluid spreads easily, a little leak will create a large mess...especially if the floor is painted or sealed.
