This video provides step-by-step instructions for replacing the tub seal on GE top-load washing machines. The most common reason for replacing the seal is if it leaks, which you can see by opening up the main access panel while the washer is full of water with a small amount of detergent: the leak will appear at the underside of the outer tub, at or near the center.
All of the information in this tub seal replacement video is applicable to the following brands: GE, Hotpoint, RCA
