[Walt Fricke]

You'd be better off tack welding the pin part to the tube with everything in place (except the shift tower) than trying to get the whole tube out without pulling the transmission (which means the engine, too unless you've done some serious tub modifications). Doesn't take much. You can get the top, and by rotating with the coupler at the rear disconnected, as many sides as you want.

If you go easy, and maybe use a die grinder, you should be able to keep the weld down to where you can slide the bearing bush over it when you next want to replace it, but if it is good now, you can push it well to the rear, and worry about a new one much later.

I wonder if Porsche glued this pin into the tube? That's how it attached the machined ball socket lower piece to the tubular shift lever itself, and over time those bonds sometimes break loose.