Overview Manufacturer: John Deere Part: MIA12566 (K46BD Transaxle) What it is: Hydrostatic transaxle drive assembly with an integrated differential and brake, designed as a direct-fit replacement for select John Deere rear-drive tractors and lawn tractors. Primary use: Provides forward/reverse propulsion with hydraulic drive for mowing and yard maintenance tasks on compatible John Deere models. Key Features Part Number: MIA12566 (K46BD Transaxle) Type of machine suitable for: John Deere riding lawn tractors in the X300R/X305R/X350R family (direct-fit replacement). Installation tips: Pre-filled with hydraulic oil and vented for straightforward installation. Shaft diameter: 19.05 mm; Keyway width: 4.76 mm; Shaft hole: 9.2 mm. Mounting hole patterns to verify: outer pattern 63 x 443 mm; middle pattern 63 x 413 mm; inner pattern 44 x 330 mm. Carton weight/handling: 15.545 kg; dimensions approximately L 87.63 cm × W 40.132 cm × H 33.02 cm. Refer to the equipment service manual for exact torque specs and wiring/hydraulic connections during installation. Compatibility John Deere X300R, X305R, X350R (models listed as general fit for this part). Alternative part numbers / cross references: AM134519; 7A646084650; K46BD (variant codes used in different markets).
