I hear a chattering noise that sounds like it is coming from the sealed transmission. But I have no apparent problems with shifting, etc.
A stethoscope and a visual inspection is in order to narrow down the source of the noise. The noise may sound like it is coming from one place, but may be traveling through the engine block. A diagnostic inspection of the noise from a qualified technician, such as one from YourMechanic, can help you determine the cause, and fix your issue.
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