Description: The 279640 dryer idler pulley, also known as a dryer belt tension pulley wheel, keeps the dryer drive belt under tension as the belt wraps around the dryer drum. This part maintains the right amount of tension for the belt to rotate the drum. Common symptoms of a bad dryer pulley are: does not rotate, no start, squealing noises, the drum rotates intermittently but clunks. Exact replacement for majority of name brands: Kenmore, Whirlpool, Maytag, KitchenAid, Crosley, Inglis, Admiral, Amana. Works with the following models: Whirlpool MGDE400XW, MGDZ600TW, WED8300SW0, WED8300SW1, WED9050XW, WED9150WW, WED9200SQ0, WED9250WL, WED9250WW, WGD8300SW1 and more. Replaces part numbers: ER279640, W10468057,279640, 279640VP, 2958, 3388672, 697692, AP3094197 Fixes the following symptoms: Squeals. Does not rotate. Will Not Start. Drum rotates intermittently but clunks Please reach out to us if you have a question about compatibility. Comment below in the customer questions and answer section or send us a message on the Seentech storefront. We’re happy to help ensure you select the right part number for your dryer.!