Wow. Thanks so much for all of the insight, guys. I had to look up a picture of a 'pawl', so that gives you an idea of where I am. I took off the back wheel, and yes, it spins in both directions as I hold the cassette stationary. I can't see how I would take off the cassette, but I did get the axle rod out (I'm not sure if that's what you call it). That didn't tell me much. But now the ball bearings fell out. I think I've kept them separate. I sprayed the lubricant into the center of the wheel, and now when it spins it seems to 'click' more. It was barely clicking before. With flashbacks to a dollhouse I once disassembled with a butter knife and could never get back together, I'm starting to thing I should just bring that wheel into a bike shop. I was just hoping the answer would be simple... like maybe something came off the track. Thanks to everyone for the advice.