My lawn guy towed my stalled ZD221 (300 hrs) about 200 ft with drive handles in start position. Now freewheels easily with clicking sound and will not engage to drive. Dealer 2 hours away. Where to start? 2 transmissions and 2 hydrostat pumps. Seems more a transmission problem. Did some pins shear? Have decent local mechanic, but needs direction on this one. Trucking mower to dealer would be awful and $$$. Could remove transmissions and pumps for servicing I suppose. Grateful for any advice.