Loud knocking noice around drum area when on final spin.

The bearing in the drum has failed and it's always noiier as it spins faster as there is more debris being thrown around inside the hardened steel casing of the bearing. Bad news is that's a write off. Uneconomical repair. It will tear its self apart shortly, probably leaking grease into the wash and leaving black marks everywhere, oor the drive belt will come off, or the drum will impact the front gasket and fill the drum with smoke. Any way you look at it, it's almost certainly going to destroy a load of washing. Throw it away now before it wrecks your washing

Move the empty drum by hands upp and down listen for noise, drumbaring my have been worne. Or is there some loose outside drum?

sounds like you are dealing with the same problem as me .
take off the front panel (after unplugging power) take a flash lite and look at the large pulley at the back just below the pulley is the helix check to see if they are worn .

http://fixitnow.com/wp/2008/10/21/amana-washer-makes-loud-ratcheting-noise-during-spin-but-doesnt-actually-spin/

Hi
The most common cause of this is the main drum bearing seal has failed and water has washed all the grease out of the drum bearing and knackered it. You will hear a loud roaring noise on the fast spin when this has happened. As it's certainly not a 5-minute-job, it's not economic to have this fault repaired on an older machine if you are paying for the repairs yourself. Get a new machine.
It is fairly unusual for balance weights to come loose as they are usually held tight by locking nuts. I've seen it happen but not very often. Sometimes they break off the drum completely. Symptoms of this are loud knocking noises, the machine attempting to leave the building while on a fast spin and a heavy piece of metal/concrete on the floor under the machine!

Thanks for contacting Fixya.com

Hi
The most common cause of this is the main drum bearing seal has failed and water has washed all the grease out of the drum bearing and knackered it. You will hear a loud roaring noise on the fast spin when this has happened. As it's certainly not a 5-minute-job, it's not economic to have this fault repaired on an older machine if you are paying for the repairs yourself. Get a new machine.
It is fairly unusual for balance weights to come loose as they are usually held tight by locking nuts. I've seen it happen but not very often. Sometimes they break off the drum completely. Symptoms of this are loud knocking noises, the machine attempting to leave the building while on a fast spin and a heavy piece of metal/concrete on the floor under the machine!

Thanks for contacting Fixya.com

Verify that the inner drum isn't broken. Sopin by hand it should trun smoothly and staight.

I think that the drum bearings have gone on the machine..

To open the door and spin the empty drum quickly by hand and you should hear the noise or say a less amplifed one.. You can also move the inner drum up and down to see if there is something wrong with it..

The spin bearing or basket drive may be worn. When these components are worn-they prevent the drum from spinning freely, and usually you hear a loud sound during the spin mode.

Bad door latch or Control board is bad

LETS check the DRAIN MOTOR PUMP it could be clogged , open panel of washer to access inside , look for a small motor with 2 hoses connected to it , take it out , clean it , re install and try it again , hope this helps AJ