can't find the rattle in the rear, rattle, rattle Options

[lipweb]

Hey guys. I just bought back my old celica and have been busy working on it. The exhaust was so loud on this beast that I couldn't hear the rattle until I just replaced my Hi-flo cat with a new quieter and deeper sounding one. Now I can here myself think.

This is the problem - I have a rattle coming from the rear passenger side. I thought it was the hatch - it is not. It is not anywhere in the trunk area. I've narrowed it down to somewhere between the b-pillar and below the rear quarter window. Any thoughts? It is driving me NUTS. I can only here it when I hit a bump. It sounds like the hatch is shaking. But it is not the hatch.

I hope 1 of you knows exactly what it is. thanks.