Amana lwa40aw noise during spin cycle

drain or drain pipes blocked
bearings gone

I guess you washed some curtains and blankets in it that it spun unbalanced. There are 2 things. One is the one of the suspension springs broke off. Another is the center post is already bent. You may have to check inside. If you are handy, you can take off the cover and check. Suspension springs are dangerous when being replaced. You may have to wear a pair of goggles. With the centerpost, it is difficult to replace. I suggest you call a technician for this.

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I have a similar model (WTW4850XQ1) that was making a very loud grinding/screeching noise during the agitation and sometimes the spin cycle. I unplugged and turned it on its front to get underneath and exposed the motor/transmission unit. Took the cover off the belt drive assembly and my drive gear was loose. Simple tightening down of the nut was an easy fix for me. But some times those plastic gears between the drive pulley assembly and transmission crack or the teeth wear down (think it's called the CAM). That is a fairly cheap and easy fix as well ($35). Repair Clinic website has free videos on how to diagnose and fix issues and parts as well. Worth a look.

see this causes and fix it. God bless you
Tub Bearing If the washer is making a loud noise the tub bearing might be worn out, this is a common problem. The bearing can be replaced.

Clutch If the washer is making a loud noise in the spin cycle, the clutch assembly might be worn out. The clutch assembly makes the connection between the transmission and the inner tub. It is designed to allow the tub to get up to the proper spin speed gradually. As the clutch wears out it may become loud during spin or just after the spin cycle finishes. The clutch is not repairable, if it is loud or not working properly it will need to be replaced.

Drive Belt If the washer is making a loud noise the drive belt might be defective. Over time the drive belt will dry out and start cracking, eventually a piece of the belt can break off resulting in a loud noise whenever the motor is running.

Transmission If the washer is making a loud noise the transmission might be worn out or defective. There are many other more likely causes for noise from a washer. If the noise turns out to be caused by the transmission it may have to be replaced.

Transmission If the washer is making a loud noise the transmission might be worn out or defective. There are many other more likely causes for noise from a washer. If the noise turns out to be caused by the transmission it may have to be replaced.

Drive Motor If the washer is making a loud noise the drive motor bearings may have worn out. Washer motors are normally almost silent when they run. If the motor is run without a belt hooked up to it and it's loud it will have to be replaced.

Water Inlet Valve If the washer is noisy or loud, particularly when the washer is filling, the water inlet valve is at fault. Replace it.

Tub Seal and Bearing Kit If the washer is making a loud noise the tub seal and bearing kit may need to be replaced. This is a common problem and the parts are relatively easy to replace.
Rear Drum with Bearing If the washer is making a loud noise the rear drum with bearing might need to be replace. On this washer the bearing is not sold separately, the entire rear drum will have to be replaced. This is a very involved repair and will require disassembling most of the washer. However, the problem is going to get worse very quickly and so either the drum and bearing will need to be replaced or the washing machine.

Bearing If the washer is making a loud noise the bearing might be worn out. As bearings wear out from friction they gradually get worse and worse until they fail. In the meantime they get louder. If the noise primarily happens during the spin cycle the bearing is likely the problem.
Drive Pulley If the washer is making a loud noise the drive pulley might be worn out, cracked, loose or bent. Remove the drive pulley and inspect it carefully. If it is damaged or defective replace it.

Pulley If the washer is making a loud noise the pump may be worn out, or something might be caught in it. Remove the pump and inspect it for debris. If it is clear and the blades spin freely the problem might be somewhere else.
U-Joint Kit If the washer is making a loud noise the U-Joint may have failed. This is the primary drive mechanism for the agitation motion in this washer. Although this is not a very difficult repair for a DIY'er with some experience, the part is expensive and so it may be worth considering a new washer.

Motor Coupling If the washer is making a loud noise the motor coupling might have failed. The motor coupling connects the motor to the washer transmission. It is designed to fail if the washer is overloaded in order to protect both the motor and transmission

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/

Most noises from a washing machine occur during the spin cycle. If you hear loud thumping during the spin, the load of clothes may have become unbalanced. Stop the washer and redistribute the clothes, then re-start it. Repeat these steps if necessary.

The following are the reasons for the drum not spinning :-
* Test the lid switch
* Test the timer control
* Test the centrifugal switch
* Test the water level switch
* Inspect the motor coupler
* Inspect the drive belt (belt drive only)
* Inspect under the washer for soot (clutch)
* Test the motor
* Inspect the pulley
* Test the transmission


In the case of loud noises in the machine, the drum bearings might have been damaged and might need a replacement. Also do check the leveling of the machine. Good luck.

the machine is nknown to have bad main seals, in turn leading to the corrosion of the spin bearing, in which case makes it sound as if a helicopter is landing in your laundry room

The spin cycle activates the fast mode on the motor, squealing normal occurs due to belt slippage. I would check your belts (look for cracks. Check the belt tension as well, most washers have an adjustment, normally on the motor that allows you to increase the tension of the belt.