3878 - Rear Crankshaft Seal Installer Tool - 6.6L Duramax Diesel
- Press fit rear seal to engine block & crankshaft for proper fitment of inner & outer seal body
- Services GM/ISUZU 6.6L Duramax 2001-2016 GMT800, 2500HD & 3500
- Installation instructions: Set new seal on inner body of tool. Attach outside ring of tool to the end of the crankshaft assembly, turn forcing screw to press in new seal
- Compare to GM Factory tool J-44642
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