Forget that block of wood and hammer to remove the main bearing Removes the old bearing straight without possible damage to the transmission case and without removing the transmission case This product can be used with Harley-Davidson 5-Speed Big Twin All Harley-Davidson 6-Speed Big Twin All Harley-Davidson Twin Cam 88 A (Except 2006 Dyna) 99-06 Harley-Davidson Twin Cam 88 B (Except 2006 Dyna) 99-06