Was cutting my grass and all of a sudden while motor was running and blades turning forward movement stopped. For a second I smelled something burning and light grey smoke coming from the mid to front underbody section.... Turned it off pushed it using the freewheelin lever back to the garage and restarted.... Everything worked fine except pushing the peddle for forward and reverse resulted in nothing... no movement either way. Quick look and the drive belt seems to still be on and in good shape..... Anything sound familiar? Thanks....