Doug W Corolla , NC October 13, 2014 Appliance: KitchenAid 5-Speed Blender KSB5BU4 Kitchenaid Blender Ksb5bu4: Kitchen aid blender: upper coupling froze up/coupler was destroyed. How to replace Blender Drive Coupler. Got online, found AppliancePartsPros.com, watched the video on how to change the coupler, ordered the parts, received them in TWO days, and brought it back to nearly new condition! Oh, utilized the Live Chat in the parts department to ensure that I was ordering the correct part/s... So fast and Dannielle was ultra professional in helping... That was EASY! 21 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes