braking makes sound in gearbox
 

I am having some issue with my 98 Milly 2.5L. Doesn't seem to be doing anything to the car right now, but kinda freaking me out. When I hit the brake when the car is in park. I can hear a noise directly below the gear shifter, so I am assuming is coming from the gearbox. The transmission has always seemed kind of violent, but seems to just be a universal mazda trait. But just in case, I am throwing it out there. This is one of the weirder things I have come across, so not sure where to start. Any ideas?

Jeff