Tachometer needle vibration

[bglfgd]

Earlier today I thought I noticed the tachometer needle slightly vibrating when the transmission upshifted, it was under somewhat heavy acceleration - RPM between 3500-4000. Once the 4runner was parked I revved-up the engine to about 4000 RPM for a brief moment and released the gas pedal - once the needle started going down there was a subtle vibration. Did that few more times and the vibration was there upon both acceleration and deceleration of the engine once the needle went over 3K RPM - I'm talking just quick bursts at the gas pedal, if I keep it steady at 3-4K there's no vibration. There's a good possibility this has always been the case and I just happened to notice it today since the engine doesn't spend much time over 3K RPM... I tried to take a video of it but the vibration is so subtle that the video quality my phone is capable of wouldn't cut it. This is a stock 2016 SR5P with 23K miles. No noticeable engine issues to report.
Knowing how long this engine has been around I don't have much of a concern regarding reliability, just curious if anyone else has noticed anything like this?

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[TfourR]

Nope, nothing here. If it won’t show up on video due to it being subtle, then I wouldn’t worry about it.

 

[johnbt]

I'll try to remember to look in the morning. I don't think I've looked at the tach since I bought it 15k miles ago.

 

[BobsTrail]

If I get to 4K quickly, I'm watching the road and terrain, not the gauges.

 

[bglfgd]

If I get to 4K quickly, I'm watching the road and terrain, not the gauges.

Duly noted, however, since getting quickly up to 4K RPM in a 4runner doesn't really equate to any meaningful acceleration I figured I'd get away with it...
On a serious note, as I said I THOUGHT I saw something while driving and only looked into it closer once in P.

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