Pumps
Turquoise: There was actually no oil on the outer tub or the boot but I wiped the top of the transmission and there was a black oily film on top. Also there was oil leaking when I tilted the machine to its side to install the new pump so I'm guessing there's a bad seal. I'm sure the easiest thing to do would be to swap out the transmission but this is the older metal housing and I think those are actually quieter so might be one I could just service and reseal.
Yogitunes: This pump seems to airlock and it's one of the new ones I found on Ebay. I found an older one so I went ahead and bought it and will see how that does instead. Definitely true that not all pumps are created equal.