Well I didn't check the gear oil on my Turf Tiger and guess what? That's right the bearings didn't like being dry! Had one cease right up. Stopped the motor immediately too! Scag dealer told me it was a "non-serviceable part" and I had to buy the whole $300 gear box! Well, it's turns out that the bearings are just common ones and my local mech. said he'd put a new set in for the cost of the bearing's 20.00/ea and 1/2 hour labor! Oh yeah, the reason there was no oil? When I removed the box noticed the side plug was backed 1/2 way out and it could be turned by hand! Lesson learned!