William H Thurmont , MD September 18, 2020 Appliance: KitchenAid 5 Quart Stand Mixer KV25G0XGR5 Kitchenaid Mixer Kv25g0xgr5: Planetary drive fell off shaft. How to replace Planetary. Replaced planetary assembly and one other gear inside the gearbox which was worn but didn't cause the problem. Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes