I bought a new 1046i zero turn cub cadet around 2009 or 2010 and it has lost at least 1/3 of its forward speed, is this a common problem. The hydrostatic drives are sealed so I can't check fluid levels. The linkages all seem to fo to their max position, I'm at a lost other rhan taking it to a service center. The mower travels straight, so what ever is happening is affecting both drives. My reverse speed is normal and actually I believe the mower moves just as fast in reverse.