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Second update: Part cost is way higher now. My new cost is $1920 + core. So, I decided to rebuild the unit myself. I opened it up over the weekend and it looked very good inside. The bearings seemed very smooth without any noticeable excess movement. The output flange splines seem worn and thus loose. I plan to use loctite 660 on the flange splines upon reassembly. I have ordered a clutch pack kit for $311 (including expedited shipping) and will install upon arrival (Wednesday). The existing clutch disks and steels looked okay, but I don't know how much material the discs had when new. The steels looked a little discolored, but not blued. And, I ordered a rubber guibo to replace the original aluminum version that I suspect contributes to the spline wear. BMW TIS demands that the rubber guibo be used upon reassembly.
I will update again after the unit back together and in the car.
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