Oh Wow! You've found a gurgler! I love how the motor starts as soon as you start the machine and then there is a LOUD BANG when it starts to agitate. I was living in an apartment house with turquoise Speed Queens in the laundry room when Stevie Wonder's Sir Duke came out and there were parts of the song when the horns stop and it's just the beat of the keyboard, drums and guitar that made me think of the rhythm of the SQ when the water valve closed near the end of the long, loud flotation rinse and suddenly all you heard were the sounds of the motor, some water slopping over the side of the tub, the pump and that transmission clunking back and forth. That was short-lived until the next LOUD BANG to shift it into spin.
I hope you enjoy this and that nothing needs to be done to it, but if so, I hope you have the special angled tools needed to work on it without cutting your knuckles to shreds.