Hey guys. I got a 1991 BMW 318ic and about a month ago my diff started to make noise when ever I took my foot off the gas so today my mechanic opened my diff up and the Side Bearing Houseing is brokin. I went to BMW and they said they don't sell that part. Does anyone know where I can get that part and if all the E30 diffs use the same side bearing house. I really don't know the real name of it. Here a picture. Its the piece that number 9(bearing) sits on.

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