The left rear wheel on my 2000 bobcat 753 lost its drive power! Cheched chain case and fluid and chains appered fine. Jacked up the back end and that tire freewheels? Could this mean a broken axle, other wise it ran fine, no bad noises, wasnt working it to hard. Ive hard the machin for 5 years, has about 3000 hours, maintained it well. I have never done any work to the drive or axles before so any info would help. Thanks