1. It looks like the dimpled bushing is inside your primary drive gear in the above picture, sometimes they get stuck due to oil stiction.
2. Usualy there is a collar next to the crank bearing, but are the rear drive teeth for the oil pump correctly lined up with the oil pump gear in the above pic?
3. You shouldn't use an impact gun when installing the clutch nut, it may cause binding against the crank bearing.
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