A833 Reverse Detent Assembly

Going through the process of hunting down any leaks that cropped up on my ride. One caught my eye.

To best describe this, it is the large nut - with bolt - below the reverse light switch. Has anyone ever removed one with the transmission in place? I know there is a spring and metering ball beyond that, but I want to be sure nothing drops out into the transmission case before I put a wrench to it. Rather have the leak than to have to pull the trans to fish the pieces back out.

The leak is...

A833 Reverse Detent Assembly
Author: wedg2go