Hi @ambientprotect ,
Did you mean FGZ831AS1?
Does the drum rotate freely by hand?
If not remove the drive belt and then check. It may be a faulty bearing.
If it is the above model number, here's a link to the [https://www.partselect.com/Models/FGZ831AS1/|parts diagrams] that may help.
Click on ''Symptoms > will not tumble.'' It shows the possible reasons for the problem. If you then click on one of them e.g. drum support bearing, there is a video that shows how to replace it. The other possible problem parts also have videos.
Hopefully this is of some help.