Hi I recently purchased a used Cub Cadet Self Propelled 12AE18M3056 [2008] 6.75 HP 173CC OHV

seems to be the same as the 2010 CC550ES.

I think I may need to adjust how the drive system releases?

I notice when I release the lever to stop and turn around or to pull back, ... most of the time the rear wheels are making the "pop pop" or "clack clack" noise...

but I have noticed occasionally if I release the lever an roll forward a little bit sometimes it is OK.

Any thoughts?