I found once I had the opportunity to clear the F51 code by removing the rotor cover, etc, that there was a very fine baby powder like black powder in the rotor cover and on the rotor motor (or whatever that thing is with all the copper wires and the wonderful computer stuff. The tub seems to be floating correctly but still have the scrubbing. The teeth on when I took the agitator cover off, Part number: AP3892170, don't appear to have any wear on them as you described to look for. Guessing I am going to have to call someone.....UGH! Any advice?

kept getting F-51 code on maytag bravo 2013 washer. bottom line, after trying everything else I found that the bolt holding the motor cover was loose( you need a large allen wrench) . I tightened it and the washer now works great.
we heard a loud bang from the tub when it spun before the F-51 code. it was the tub banging around because it was loose on bottom. Glad it was a quick inexpensive fix, as I haven't the talent for this sort of thing.

I finally found the problem after hours of troubleshooting and researching online. After getting the F51 error I began by taking the drum out of my 5 year old tub. I found about 30 cents in change but nothing bad or plugging the drain. I cleaned up the unit while I had it apart (it was pretty gross in there). After putting everything back together I was still getting the error. I decided it must be the RPS so I ordered a cheap replacement through Amazon. I replaced the sensor with the help of some YouTube videos and fired up the machine. I seemed to work, but when it was time to spin it had a slight delay and made a quiet sound like the motor was stalling. After 5-10 seconds it would engage and everything worked fine after it got started so I left it be. The washer worked for about another month or 2 before I started getting the same error code. Getting frustrated, I knew the root cause of the problem had to be something else, so I got back under the appliance. I disassembled the motor and RPS again. I cleaned the contacts to the RPS even though they looked perfect.

Then as I was beginning to reassemble everything I found the problem. The large lock nut around the shaft was very loose. I think it was 2 full rotations loose. I tightened it up best I could with a vice grip and large wrench. After putting everything back together the washer runs beautifully. Quieter than ever and there are no more delays. It just goes to show you that error code troubleshooting will only get you so far. Sometimes you have to look for other possible problems that could happen.

Finally solved my F51 error... Been fighting this @#$! error for past 2 yrs, whilst cursing the Bravos for at least that long. So I've been chasing the various possible issues like socks between the tubs, change blocking the drains, etc.

Today, I'd disassembled down to the outer tub and noticed the shaft had some pitting, though I found it hard to believe that was the cause of the F51, decided there were not many other options. I'd planned to order parts and reassemble until they arrived (the laundry must not be held up given 4 teenagers!)

In one last attempt to address all options I'd tipped the unit back to wiggle the rotational sensor wires and what did I find?!? Some socks and wash cloths collected under the machine to the point that they were pressing the foam noise baffle on the bottom up against the motor spindle. In removing it, there was a clearly worn path coinciding with the contact point. Ahhh,.... all so obvious now. Confident this was the problem. Thanks for the great forum and all the ideas bantered about.
Best,
Tim

Hello. I too have an f51 code on our washer I've replaced the bearing already a couple of years ago. last week I code the code. Washer sounds fine. I pulled tub, and there was nothing wedged anywhere. I am trying to get the rotor off to look under that, but the rotor bolt spins loose, but won't come off. I can tighten it. but when I loosen, it just spins and doesn't come out. Any suggestions?