Well your Cruiser has several thick layers of noise deadening sprayed in to it , that made a big difference . The 4:1 gears will always have this faint howl on the highway unfortunately but once in 4 low it makes up for that .Nice to know what they look like inside. Compared to everything else, I don't think they are that noisy in my truck. Only at a particular speed and RPM do I think, is this the noise everyone talks about. Too many other competing noise makers in my troopy...
Great to see you putting this to the front of your endeavors.