I've noticed lately that when I go from reverse to drive and vice versa, you can hear and feel a "clunk" from approximately the area of the differential on the back of the transmission. If I have been driving forward, then come to a complete stop & shift into reverse, then give it a little gas, I get the 'clunk' right before it starts to move. Same thing if I do the opposite - stop, shift into drive, and then start to give it gas - 'clunk'. It shifts through all gears just fine while driving. Transmission seems just fine otherwise. If I have been going forward, stop, then go forward again, no clunk. Only when changing between drive/reverse.
I'm thinking it is something in the differential, and may even be normal. Thoughts? Thanks!!