Agitator move slow and machine runs loud grinding sounds

check belt under unit if ok check under agitator for bad cog splines

Bearings

It sounds as if the tub bearing on your machine is faulty. To replace this bearing one needs to basically strip down the entire machine.
Not a job for a novice.

Look under the washer. Is there a little pile of black rubber shavings? This sounds like the basket coupler between the motor and the drum. If the coupler is the problem it is inexpensive to fix. Some also call this part the "clutch". It kind of looks like a hockey puck with six holes in it... three for the motor, three for the clothes drum. In your case, I suspect that the holes are intact in the direction of spin, but as soon as it reverses for agitation, it breaks out through the back of the holes.

My Maytag Performa makes a grinding sound when it agitates. When it starts to dump the water it makes a loud grinding on metal sound... really loud. What is the problem and how much to fix?

its your drum bearings going there just about worn out,,not a cheep job to fix sorry,,,soon it will start leaking water from the drum drive shaft!!!

Hi, this is a bad transmission gear box that is stripped at the moment. i recommend purchasing a agitator kit and a new transmission Assembly and clutch as well. this will fix your issues

Well, Sounds to me like the Bearings are going out, but it could make that noise a good while, before it goes completely out.. Replacement would possably be more cost effective, Kinda hard to beleive !!!!!!

If the fill and drain functions correctly, AND the spin cycle works correctly, AND the cycle itself starts and completes correctly, the problem being that the back and forth motion of the agitator starts the loud grinding noise, it will likley be broken gears in the transmission. The single most expensive part in the washing machine.