Question Regarding Cub Cadet 610

[DoubleB]

I am new here, I am a new owner of a Cub Cadet 610. I bought it used, it is a 2004. I know nothing about tractors so please bear with me. There is a problem that just started and it is intermittent. When you are driving it will stop moving. You can hear the transmission spinning (it is hydrostatic) and it wont go. If I shut it off and wait a couple minutes it will go again. I have checked the fluid levels and they are fine. Any suggestions?? Thanks for any help you can give me in advance.