245 sound/stop points rear axle or wheel bearing

Hello everyone, I have been in possession since last week of a Volvo 245 year 1993, which I brought with me from Sweden. It is a “240 Classic”, i.e. from the very last series of 200 (or 240?) pieces, which were numbered individually at the time, with certificate of authenticity from the factory and badge on the dashboard. Mine has the no. 46, so is the 46-letz-built of all 200s. My experience with this vehicle type is so far rather small, so I hope that someone from The visit to the TÜV resulted in some minor defects, nothing serious, to fix everything really well. Among other things, the rear brake discs are strongly corroded, so that I first dismantled everything. So the brake calipers and the brake discs. Also so far well, the discs have quickly “must be persuaded” by a 5 kg hammer to leave your original seat. The problem now is that when turning the wheel hub (left or right) reg When the motor with inserted gear is running, it is not noticeable to hear. Is this so normal? Can a locking differential be installed here? Or have the wheel bearings been destroyed when the brake discs were removed? The effect is exactly the same on the left and right. I transferred the car to Germany on my own axle last week, it was so normal. Thanks very much al for your support! //Jörg