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Hi, I am certain it is the same phenomenon. As you said it is associated with the motor re-engaging the clutch after the rider has momentarily caused motor torque to drop by reducing their own pedaling input as when shifting. Interestingly it hardly happened at all on today's ride because...

I picked up my TQ equipped Trek a week ago and noticed a strange growling sound coming from the motor under certain conditions. It turns out that that happens under conditions of high cadence and/or low pedal force that can occur after shifting. It does seem to be associated with a temporary...