Originally Posted by
woodcraft
First check that the cassette is on tight, & that the quick release is tight.
Then clean & lube the freehub body- disassemble w/ two 5mm allen keys. Don't be in a hurry to buy a new freehub- they last long
AFAIK.
The 11 speed freehub will work for 10 speed w/ a spacer.
Some RD adjustment may be needed w/ any cassette change.
Do your own adjustment- the LBS might just put some oil on it & call it good.
I removed, cleaned and regreased it. The QR and cassette are tight. I'll let you know if this solves it. Thanks.