So it's fairly seldom where I am unable to find the cause of a problem, this is one of those times.... I recently installed a new 10 bolt rear, and built a truck arm suspension for my 51 Chevy hardtop and have a on again off again (more on then off) clunking noise from the rear end when I hit the brakes. The suspension is solidly fabricated and installed, trucks arms ran at an angle from the crossmember to the axle, frame width Panhard bar, air bags, shocks, all the parts to make it right. The clunking sensation sounds/ feels like the whole rear axle is shifting but after checking and re checking there is no way it's moving. I thought perhaps it was the brakes but I have rebuilt more drums than I care to admit so I know that they are right, the master cylinder is a cpp power deal, no prop valve (could that be my issue?) I am reluctant to believe its the slip yoke as the truck arms keep the axle firmly located. Any thoughts/ ideas/ solutions would be greatly appreciated!