Peter W Wareham , MA October 07, 2014 Appliance: Jenn-Air Self Cleaning Free Standing Gas Range JGR8775QDW Jenn-Air Range Jgr8775qdw: Oven gasket required replacement. How to replace Range Oven Door Gasket. Removed existing gasket and replaced with new gasket in less than 5 minutes. Very Easy. Make sure to remove the lower burner cover (inside the oven) which allows you to pull the end gasket material through the two circular openings in the frame. 3 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes