Help with Grinding sound when breaking and lightly when not.

'14 Prius V 150k miles.

Over the past couple of months a grinding sound has arose when I slow down between 20mph-5mph. You can't really hear it outside with the windows down, but you can in the cabin especially with the windows up and the cabin is quiet. I can even feel the grind in the steering wheel when slowing down to brake and if going left/right at low speed.

I assumed it was the brakes, but the pads, calipers and slides are all look and work smooth and perfect. The pads were changed about 3000 miles ago so their still brand new.

Next I thought it must be one of the wheel bearings. So I changed both front wheel bearings. Nope, noise is still there.

I reversed and got to speed and tried to brake, but the sound is not there when in reverse, just forward.

Anyone have any idea what else it could be if it's not the brakes or the bearings?

Thanks all!

 

Yes it does

 

To my knowledge bad CV joints would be a clicking and pop sound.... Not this type of grinding?

 

No, just removed all the brakes and checked. Their all good

 

If it were the tranny, why would it grind when breaking? Slowing down without the brakes applied you barley hear it... Turning hard left or right at low speeds you can hear it without breaking, which is why I thought it was the bearings.

 

So these would grind more when breaking? Wouldn't they just grind all the time breaking or not?

And is there a way to test and re-lubricate these or do you need to buy new ones reguardless?