They need adjustment, the drums need you to back up and hit them several time. It'll take a short time for them to adjust...if they have auto adjusters. Tim

1941 Taylorcraft
1968 Charger
1994 Wrangler
1998 Wrangler
2008 Kia Rio
2017 Jetta

I didn't do 4 years and 9 months of Graduate School to be called Mister!