The OTC Crankshaft Rear Seal Remover, No. 6740, is a three-jaw puller designed to grab the inner lip of the seal. The forcing screw attached to the center plate is used to react against the crankshaft end to pull the seal out, eliminating damage to the block and crank that prying the seal can cause. For use on 2001 and later 6.6L Duramax diesel engines found in GMT800, 2500HD, 3500, and GMT900, GMC Sierra HD and Chevrolet Silverado HD, as well as 2006 to 2016 Chevrolet Express and GMC Savana.