In the spin cycle it sounds like a jet plane taking off. very loud. What could be the problem?

Sounds like the main bearing has gone south, this is an expensive repair and not worth it, Buy a new one!

I assume you mean it sounds like a jet plane when it spins, if so, I suspect a bad tub bearing. Depending on age of the machine, probably too expensive to repair.

most likely bearings are going bad

you may have something between the tubs or your bearing is going bad . does it sound like a jet plane in spin cycle?

a loud noise comes when you forget to remove shipping bolts after installation or if the shocks are worn out it makes noise thirdly the bearings might be worn out if the washer is more than 6years old

The bearing in the outer tub assembly is going out and you will need to replace it. Here is the part if you want to order it but you might want to look into buying another machine.

Most likely it is the spin tube bearing worn. Reguires some know how and special tools. Requires a major dismantle of the machine and usally I did these repairs in the shop. Bearing will eventually sieze over use and time. Labor will probably exceed the value of the machine.

If it is making a sound like a loud rumbling sound similar to a jet plane taking off, it probally due to the seal has failed causing water to leak into the bearings. The bearings begin to rust, and no longer round and the noise gets progressively louder. It can be rather expensive to fix. Get a few estimates before deciding whether it is worth fixing.

If the washer is vibrating a lot, then you could have a bad drum bearing. There are also counter weights and shock absorbers that could be bad. The best thing to do is take off the back panel and look inside. many times the problem can be clearly seen. Usually a loud noise like a jet plane on spin cycle means a bad bearing. This can be costly unless you can do the work yourself. The parts are readily available.

If it sounds like a jet plane taking off, a grinding noise, it is the bearing. This is pretty difficult to replace. If you do attempt it, you MUST replace the inner tub seal. This is leaking onto the bearing, causing it to go bad.