Automatic Transmission Oil Pump Seal Front  The transmission pump seal is also known as the torque converter seal or torque converter hub seal. While the torque converter is operating, this seal prevents fluid from leaking out of the front bell housing.  MODEL YEAR C230 1997 - 2000 C230 2002 - 2005 C240 2001 - 2005 C250 2012 - 2014 C280 1997 - 2000 C300 2008 - 2014 C32 AMG 2002 - 2004 C320 2001 - 2005 C350 2008 - 2014 C43 AMG 1998 - 2000 C63 AMG 2008 - 2015 CL500 1998 - 1999 CL550 2009 - 2014 CL600 1998 - 1999 CL63 AMG 2008 - 2014 CL65 AMG 2008 - 2014 CLK320 1998 - 2005 CLK430 1999 - 2003 CLK500 2003 - 2004