Ariens 53213600 – Replacement MPN: 53213600 Ariens OEM, Part Number: 53213600 GEARCASE ASS’Y – 26 ALUMINUM Genuine Ariens Part # 53213600. Ariens 53213600 Gravely Gearcase Ass’Y 26 Aluminum. Ariens Part Number: 53213600 Compatible with the following Models: Ariens ST926LE Ariens ST8526LE Ariens ST8526L Ariens ST8526DLE Ariens ST1332LE Ariens ST1328LE Ariens ST11528LE Ariens Pro 26. We are proud to be a factory authorized retailer. We use several different carriers and choose the most economical for the item and destination based on the estimated transit time displayed. FixMyToys – A Division of Ball Equipment.