I have a 2000 GS with about 80k, and some of the sounds I'm beginning to recognize are killing me. When I switch gears, my car makes a thunking click. I used to always put my car in Nuetral at red lights and its become painful to hear. Is this normal with age? What can I do to quiet gear changing? The clicking feels like its coming from underneath the middle of the car. Any help would be appreciated.

 

of course its coming from underneath the middle of the car.....its the transmission clicking.
maybe flush your tranny and see if it helps