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That block crack is the EXACT same block crack on every one of the trucks with driveshaft vibration problems. It goes from the oil pan bolt up, turns 90°, and then to the bellhousing bolt. It was identical on mine, as well as several other posts here over the years. (PSA: Read my common problems doc here in my signature.)Wow never seen a LMTV with the block cracked back there. Does it run? Very definitely a lemon. More like humpty dumpty.