1 Knocking sound when starting and ending spin cycle
Hi fixers,
I've got a Bosch VarioPerfect Serie 4 washing machine that has started knocking loudly when the machine is ratcheting up or down from the spin cycle. The spin still works and the machine doesn't excessively wobble or move around. It'll knock very loudly, very quickly (3 knocks per second maybe) for 20-40 seconds when working up to the spin cycle, then it'll stop, then start again when the spin cycle winds down. During the normal wash cycle, it works perfectly. Whisper quiet.
I found a manual online but it didn't have any useful info. And I haven't cracked the machine open yet, so I can't say what's going on inside at this point. This will be my first time dissecting something larger and more essential for living than a sewing machine, so any insights are appreciated.
crwdns2934109:0crwdne2934109:0
392 
1.5crwdns2936485:0crwdne2936485:0 
Hey @mikeb44808 , @jayeff
Thanks so much for the advice, y'all and sorry for the delayed response. I took a few days to look into it and the dampers seemed to be the likely candidate. I watched a tutorial on how to change them out, and located and priced replacements parts. The drum didn't knock when I manually pushed it with my hands like in the tutorial I found, but everything else seemed to be exactly as described. So far so good, right?
Then all of a sudden, after 4 months of knocking, the sound has just...stopped out of nowhere. It's like the washing machine knew I was talking about it. Which is good news, I reckon? But if it starts up again at least I know what to check first.
Jayeff, the model number is WAN28121 /23
crwdns2934271:0crwdnd2934271:0 gumpo crwdne2934271:0