Weird sound from engine bay. Diagnosis help

[LandTuna]

I have this weird sound when the truck is in drive and stopped. It’s like a loud hum or vibration but only when in drive and not moving. If you go into neutral it goes away and if you press the gas it goes away. I’m stumped as to what it could be, any advice where to look is greatly appreciated.

 

[nissanh]

Engine or trans mount?

 

[abuck99]

Engine cover still in there?

 

[LandTuna]

Engine cover still in there?

Yeah it’s still on there.

Engine or trans mount?

It’s not really clunky like an engine or trans mount could be. Very consistently humming.

 

[AlpineAccess]

@abuck99 is tracking, I think it's probably an engine cover, heat shield, etc.

I had a buzzing noise an hour after a water crossing, found 2 little rocks were on top of my skid plate . Worth checking there too.

 

[LandTuna]

Thanks I’ll look into it and report back!