If it is a loud mechanical noise like a tearing rattle, it's probably th edrum bearings have gone. Pig of a job, if yours is a machine it can be done on at all.
Assuming its front and back bearing, plus seal, you could be looking at £50-70 just for the bits, depending on model.
DIY means no warranty and the rest of the machine is old.
Probably simplest to get a new machine from a good supplier with a long warranty.
Sorry to be the bearer of bad tidings
http://www.espares.co.uk/search/ma107pt1553/washing-machines/bearings/hoover
https://www.youtube.com/watch?v=yAg2s3sSZBU
https://www.youtube.com/watch?v=kG5HWQ0x2s0
https://www.how-to-repair.com/help/replace-washing-machine-bearings-candy-hoover-otsein-zerowatt/
My experience of removing old drum bearings is that they will have disintegrated (hence the noise), meaning the two parts of the race must be driven out individually using a suitable drift and bashing the living crap out of the thing.
Acp, August 2017