General Maintenance & Repairs - Unknown Clunk?

After 6 hard runs at the strip last friday i noticed a clunk the next day. It only does it if im on an uphill slope being rough with the clutch with about a 1/4 throttle. Its almost like a Clunk Clunk Clunk (Always 3 Clunks) that you cant here but i can barley feel in the floor board. Almost like bad U-joints on a hill. Any ideas??

I know there is a broad range of things that could be wrong i just need some places to start looking. Im thinking Clutch or rear end.

I started to think it was loose or disconnected rear suspension parts, loose drive shaft bolts, my u-joints, or a worn sleeve yoke and mainshaft spline. But i dont think these problems would cause multiple clunking? Any ideas anyone??

wheel hop!

wheel hop!


Thats what i was thinking

thats what it feels like but im not on it that much

thats what it feels like but im not on it that much when it happens