The 6.4L Powerstroke is aging and the flexplates can crack, rattle, and likely are missing teeth on the ring gear. If you've decided to up the power, or just are giving your 2008-2010 Ford an update, this Billet Steel Flexplate for the 5R110 is a solid
one piece flexplate design that can withstand the stress of your
modified diesel engine. This flexplate will only fit the Ford 6.4 Powerstroke engine.