Too far!   I meant here, so we can see it.

2 minutes ago, Zed Head said:

Too far!   I meant here, so we can see it.

Ah, I took a look at the chart I was looking at and the seal is for the end plug or something?

Actually that's a good find.  Maybe that's the one that leaks, not #22.  It would be #19 in the parts manual.  There's an o-ring, and an oil seal.  

It looks like the end of the striker rod should come off, exposing that oil seal.  Maybe you can disassemble it without removing the rod.

http://www.carpartsmanual.com/datsun/Z-1969-1978/power-train/transmission-control/5-speed

1 minute ago, Zed Head said:

Actually that's a good find.  Maybe that's the one that leaks, not #22.  It would be #19 in the parts manual.  There's an o-ring, and an oil seal.  

It looks like the end of the striker rod should come off, exposing that oil seal.  Maybe you can disassemble it without removing the rod.

http://www.carpartsmanual.com/datsun/Z-1969-1978/power-train/transmission-control/5-speed

Ya I was thinking that might be the culprit/would need to come out.

Anyone have any experience getting that out to change the seal?

There's a part with no number that looks like a screw.  Maybe?

10 minutes ago, Zed Head said:

There's a part with no number that looks like a screw.  Maybe?

Also is it possible to even get that rod out without having to remove/destroy that pressed-in plug at the end (#21)?

You're there...

Just now, Zed Head said:

You're there...

Right now I'm actually the middle-man.  The guy whose working on it is about a half hour away and we're spitballing on how to get these seals put in.

I'm going to see the part tomorrow

Looks like it might be a rivet.  I'll bet you could grind the head off of it and the end would come off.  Nissan never planned for this much disassembly, I'll bet,

Might be some good stuff in the thread I found when I was looking for the picture.

https://forums.nicoclub.com/transmission-stuck-in-first-gear-but-shifter-is-in-neutral-t602912.html

@zKars has the parts to be sacrificed, if he was interested.  I think.

Update: Got it out with Dave's help.  For those who want to know you put the housing in a vice and tap on the rod end gently and it will push the plug out undamaged and can be re-seated afterwords.

Are you going to take the shaft apart to get to oil seal #19?  I got rid of my pile of 5 speed parts or I'd have done it already.

Nobody has really dug in to that possibility as another source of the oil in the shifter cavity.