Check 7FAQ (top right hand corner of this window) for oil levels, depends on spec.
It's most likely the quill inside the drive has broken. Take the drive out, you'll need to use circlip pliers to do this, & pull the quill out of the gearbox ( it's about an inch long). It's obvious if it's broken. Other wise the drive is US or maybe it's the plastic connection inside the gearbox.