Not much is known yet about Grindcore, but he transforms into a double barreled tank and has a badass name.
IDW comics continuity
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Later, Grincore participated on the attack on Earth with Straxus. His job was setting up a Space Bridge while Straxus operated an energon drill. He and Straxus were later slagged by Sideswipe in the Jiangxi Province, China.