Ford AX4S Valve Body 1998-2003 XF/YF Casting# – Updated, Tested, MADE IN USA
The Casting Number will begin with an XF or YF.See the RED ARROW in the above photo for the Casting Number location. In the photo above you can see the PWM Blue Lock-Up Solenoid(1 ) and the location of the XF/YF Casting Number(2 ).