Example model number: MAV7700AWW.
The agitator may be doing one of those lazy numbers where it’s still going back and forth but slower than it does during the normal agitate cycle. Doesn’t matter; if the agitator is working at all during the spin cycle, then the transmission is toast, fried, smoked, FUBAR. The gears inside this transmission are all plastic. This is what we’ve come down to: cheap plastic crap not made to last but made to be repaired every few years or, what they really want, throw it away and buy a new one.
Anyway, if you’re married to this washer and want to replace the transmission, be my guest; here’s the part link to the transmission: