Hello, the following symptoms occur with my Cadillac Fleetwood Brougham Bj. 1979: After a short drive (usually from 15 minutes) there are flashing noises during slow rolling or starting. I then put myself with another driver next to the car: The rear tyres block again and again and then tear off. The whole runs up to about 15km/h so, then is calm. The vehicle then rolls quite normal, at higher speed you hear at least nothing striking. I have first the brakes are suspected: but these do not solve rationally and block. Now I have done the following: – Neutrally inserted and bent up one side at the back. The tire can be rotated a few centimeters, then it suddenly becomes difficult – the second tire also upbocked: Both tires can only be turned very hard – looks to me quite clearly for differential, so tub under and opened. Then laughs at what you see in the attached photo k I’m not a differential expert, but that looks like a limited slip differential (LSD) for me. Can that be!? Can that cause the problems? The disc wheels still look very good, the diff was at least filled. Thank you and love!