Upgrade the flex plate in your 2004.5-2005 Chevy/GMC 6.6L LLY Duramax. Crack or breakage can happen due to an out of balance engine/torque converter or from bolts that were not torqued to the proper specifications or in the proper sequence. Ring gear teeth can also break off or wear as a result of the starter, failure to use starter shims (where required), or engaging the starter when the engine is running. Excess noise when starting an engine can also be an indication of either a starter failure or broken or missing teeth on your flex plate. Eventually cracking or breakage can occur causing it to wobble. Signs of a failed flex plate can include a clunking or grinding sound with the engine running. A flex plate connects the crankshaft to the torque converter. Flex plates are used on vehicles with an automatic transmission, as opposed to a flywheel that found in a manual transmission setup. Flex plates are generally much lighter and thinner than flywheels. A flex plate consists of two parts, the flex-plate and the ring gear. Steel stock-style replacements are available or upgraded billet versions that are SFI 29.1 certified for competition use. Shop all the top manufacturers such as ATS Diesel, BD-Powers, Diesel Site, DPC, Hays, Revmax, Sun Coast Converters, Valair, and more!
