V8 engine shaking

[LP_4Runner]

Does anyone else notice that their 4th gen V8 will "shake" a bit at around 1500-1800 rpm when not in drive? In other words, if you rev the engine up to around there while parked, the truck will shake a bit like the engine is bouncing. It doesn't do it when driving (but feels very "buzzy" at that RPM while driving). Everywhere else it feels really smooth.

 

[RickyCRX]

I never really noticed that, but when you put it in neutral or park and the idle speed comes up slightly from when it's in drive, I notice a little bit of a 'shake' when it's idling around 8-900rpm in neutral or park. It is smooth as glass any other time, so I don't worry about it.

Ricky