Howdy John
I use those tires too. Mine have begun to howl the same as you describe. One of my trucks wore the front tires abnormaly and made a bunch of noise when we rotated them the noise moved to the rear and got a bit quieter. My personal truck just keeps getting louder as I put more miles on those revo's. Roll your window down and drive slow and listen as you stop. Then srart off and listen as you go to hiway speed. Mine gets better the faster I drive.
I really like everything about these revo's except the
noise. Of course it might be something else. Wheel bearing or rear bearing... But when you mentioned revo I thought I'd chime in.
Big Jim