Hit the drum in multiple locations and keep wiggling it. Paul is correct that the drum could be hanging up on wear grooves.
Hitting the drum will help it in getting past those grooves by vibration making it jump over them.
Jim
[img]https://www.stovebolt.com/ubbthread...A51D456-217E-4102-8B54-993B3C647DB7.jpeg[/img]

Last edited by 53 green 1- ton; 08/15/2022 2:21 PM.

~ Jim Schmidt, Bucks County, PA
1953 Chevrolet 3804 1-ton
In the DITY Gallery