Kent-Moore Tools For General Motors. J-39547 is a press adapter use with J-39511 Countershaft Bearing Remover split plate to remove the countershaft large bearing. J-39547 provides a surface for a hydraulic press to remove the bearing without damaging the bearing or the countershaft. J-39511 is placed around the countershaft large bearing, then placed on a press bed. J-39547 is placed onto the countershaft bearing, and used with a hydraulic press to remove the bearing.