Is it a M103 or M104? My M103 whines a bit, only audible from the inside. It isn't loud though, I haven't been concerned about it. To me it sounded like it was from the transmission (TC maybe?) but it shifts fine.

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TC
Current stable:
- 2004 Mazda RALLYWANKEL
- 2007 Saturn sky redline
- 2004 Explorer...under surgery.

Past: 135i, GTI, 300E, 300SD, 300SD, Stealth