Rebuilt Chevy, Ford, and Dodge Automatic Transmissions

Index   The 5R55S/W is a Longitudal transmission. The 5R55S/W is a 5 speed automatic transmission, 4th gear is 1 to 1, it may deliver more torque but it is still only 1 gear overdrive. The final gear ratio is .75/1 in the W and .71/1 in the S, this is what separates the two units. The 5R55x utilizes three bands and two sets of planetaries to extrude the 5 forward gear ratios, not counting lock-up. The transmission is controlled by a solenoid pack in cooperation with the valve body.

Checking your Mercon 5 Transmission fluid in your 5R55X. This unit does not utilize a dipstick, it is necessary to, safely, pull plug in the center of the drain plug in the transmission. You must have vehicle running at temp. before you remove the 30Torx. If the vehicle is full you should see a steady stream, if not fill using a pump.  Index

The 5R55S/W was introduced in 2002 by Ford.