I have a 2001 Mitsubishi Lancer CE, I recently replaced the clutch as the release bearing was no longer servicable.
After replacing the clutch I noticed during deceleration a vibration like noise. At approx 12 seconds here, I take my foot of the throttle in 2nd gear going down a hill. I've noticed the higher the RPM the louder / higher frequency of the noise, also it seems much worse going downhill vs flat ground.
When I push the clutch pedal in (disengage the clutch) the noise stops immediately. And when I reapply sufficient throttle to accelerate the noise also disappears.
I don't think it's the clutch as I imagine that would also occur while accelerating. But it definitely appears to be drive line related. Also I confirmed the transmission oil level is full after I noticed the noise.
I'd appreciate any suggestions.