I checked the half axles, they were fine.

problem was loose suspension links in the rear. I suppose while under braking with an auto tranny, the torque converter is applying a load, and the brakes are applying an opposite load at low speeds, so the loose link was able to move around on its own for a bit until the car completely stopped. I don't know how they came loose, but I retorqued them back to factory spec so hopefully this wont happen again, otherwise I might need loctite on them.

The thing I did notice though was that the EPC called for new torque specs on the newer suspension links for the w201/w124, so that might be the problem. does anyone know the new torque specs?