Ford/Lincoln/Mercury 5R55S/W Transmission Remanufactured Solenoid Block 04-ON Fits '04-later Rebuilders now have a no-hassle option of replacing worn or contaminated 5R55N, 5R55W and 5R55S solenoid blocks with Sonnax 56954L, 56954K and 56954N remanufactured solenoid blocks. The improved design of these blocks features a new, integrated, printed circuit board in place of the OE circuit assembly that eliminates fatigue failures common to the ribbon cable inside the OE circuit assembly. In addition, the integrated circuit boards soldered connections provide a more secure interconnection than the OE barbed, press-fit connection for greater durability. All remanufactured solenoids are 100% tested. New integrated circuit board Improved design over OE No-hassle direct replacement Remanufactured solenoids are 100% tested New Viton® O-rings NOTE: Fits 5R55W/S '04-later There is a shortage of cores in rebuilding these solenoid blocks, we are encouraging you to return your old solenoid core for a $40.00 refund; we have provided you with a pre-paid call tag and a core return form. You will not be charged anything additional after your purchase; the cost of the core is calculated into the part. Please follow the instructions on the form and send the core back; once we receive it back we will issue you a credit.