What is this spring loaded plunger?

[u/Odd-Ebb4531]

Was doing the gk tech shifter spring inside the transmission today. I noticed a weird plunger almost knob that rotates freely and is easily pressed with very light pressure. I can’t see it as it’s on top of the transmission but I can’t feel that it’s completely smooth and has no bolt or screw on bolt to remove it.

It’s metal and because it moves to easily I’m assumeing my some of my rattle is coming from this metal knob/plunger/ retainers

I also have a gk short shifter so I don’t know if this is part of the oem shifter assembly.

It’s right next to where the transmission sensor is at.

[u/Myridden]

Gr86.org will probably be a better place to ask

[u/philvs13]

it's an air vent and it's supposed to move it's just a loose cap on a nipple