Hi all. I just got a used Nissan np300 2.5l 4x4 with very low mileage and is very clean besides a noise when letting the clutch out and engaging the next gear that seems to go away the smoother I time the engine revs, it's been for full diagnostic tests and nothing got picked up.

The chap that did the tests said it was normal for my van to do it but need to drive it smoother to eliminate premature wear and tear.

I have tried to do some homework and can only think it's transfer case related or somewhere in the drives, I don't know.