IRS Grinding ?

[gt40gordy]

The car is a Cobra FIA from Unique.

I have had the car at our former auto repair company already. When the car was on the hoist we checked the CV's, any loose bolts in the rear, the wheel bearings,and the condition of the rotors/pads for the rear brakes. All looked god.

I may not have described the problem as well as possible.

When we push the car, not running, there is a low clunking sound which you can also feel as resistance as it rolls coming from around the rear end.. Not really a dragging feel, more like resistance, then rolls free, then resistance again.

The thing I hear when slowing down under braking sounds like the driveshaft is grinding on the frame, the car actually shudders when it happens, and it's loud. Can't find anything in the rear hitting, but it sure sounds like it is. The real kicker is that it does not occur all the time, or under any particular situation except braking and not every time.

My tech said we need to pull the axles and check the CV's when they are free from load.

Sorry for being so long winded, and thanks for the ideas, keep them coming.

By the way, other than this, I LOVE the car.