On mine I found the cable at handbrake was ripped mine would clunk.
Shims are not a safe solution.
If cables are bad replace..
First tho try roll backs
It took a while for me to solve mine working between adjusters and the mechanism adjustment.
Mine was lifting too high and didn't feel to be holding.
You can try this drive car back n lift handbrake to take slack out of the drum adjusters
I think rolling back on slight incline also worked for me.
This worked but took a couple turns.
