I have three noises coming from my front end that no one can seem to diagnose. I was hoping to get some advice. Maybe be pointed in the right direction.

The First set are a high pitched grinding metal on metal accompanied by the sound of pebbles bouncing around. These happen when I am at freeway speeds accellarating.

The third noise is a thud / knock when coming to a stop then accellarating away from it such as at a stop sign. This can also be felt on the floor.

No one who has looked at the car can find what is making these noises but they are not normal operating noises on the truck.

Any advice or suggestions?

Grinding, I dont know.

Pebbles...pinging? timming off? Its kind of common.

Clunk/Knock...broken engine mount? Something in the suspension drive train? Look at the front swaybar mounts/bushing they do go out and allow thw sway bar to make some interesting noises.

On a side note mine makes a clunk when I turn the steering wheel/hit a bump, Ive had it to two alignment shops and the nissan dealer, no one can find the problem. Nissan didnt even want to look at it due to the lift and aftermarket steering. So they gave it the once over and said we cant find it.

Definately check your motor mounts, usually it's the drivers side.

Which would account for the noises on acceleration as the engine moves with the torque.

What is the second noise? You mentioned three, but I only see two...

I would agree on the motor mount. Check it

1= Metal grinding
2= Pebbles
3= Clunk

I thought the same as you, but after re-reading it I think this is what he ment by 3.