Robert, thank you for making this video. So soothing to hear the "irrk" I'm assuming the pumps were different in each model. I could hear the pumping and cavitating in the Pulsamatic. I think I could actually hear some similar sounds coming out of the Unimatic pump during initial wash agitation and during the overflow wash & rinse. If so, that is a FIRST in my nearly 60 years of being around Unimatics. Also, please give both the Norge washer & dryer (impersonating as Montgomery Wards) very affectionate pats as I've become very nostalgic for our equivalent Dispense-o-Mat washer & Wrinkle-Out dryer that entered my life during the 2nd half of my age 9 life and have been pouring over the documents downloaded a long time ago recently.