'03 TTHP with only 43 hours. Hydros quit yesterday in the middle of a turn. Flat lawn, no prior warning, no noise, just stopped. Neither side will rotate when I put her up on jack stands and engage the drive. Fluid level is fine, no discoloration. I've looked in the manual and tried to figure this out to no result. As both wheels are dead there must be an electrical connection or belt involved, but I see no fuse in the wiring diagram and there is no broken belt. Any ideas??