Units are very similar in appearance, but vary by early and late — and cannot be interchanged. Reference the Sonnax identification guide to verify the correct valve body is installed.

6F50, 6F55

Remanufactured Valve Body
Part No. FD6F50E

Fits '07–'09 units with 1.35 ratio 3-5-R. Sold without transmission control module.

Tech & Install Tips Find a Distributor

Sonnax remanufactured valve body FD6F50E has been designed to address common issues, such as: line pressure instability, burnt clutches, harsh shifts, TCC apply concerns, codes P0741 and 742, ratio codes, delayed engagements and various shift concerns.

To guarantee the highest level of operational performance, this remanufactured valve body is tested on state-of-the art equipment to verify that main line pressure, actuator feed limit pressure, clutch pressures, and torque converter pressures match OE specification.

A transmission control module (solenoid body) is not included with the valve body, but is available from OE and various aftermarket sources if required.

  • Bores, checkballs, seals, casting...every critical area is reviewed, refreshed and repaired
  • New separator plates and gaskets installed
  • Top-quality Sonnax components optimize valve body function and prevent future wear
  • State-of-the-art testing verifies main line, AFL, clutch, torque converter pressures match new OE specs

Save your existing manual valve for reuse with our remanufactured valve body.

  • 6F50, 6F55 Remanufactured Valve Body FD6F50E
  • 6F50, 6F55 Remanufactured Valve Body FD6F50E
  • 6F50, 6F55 Remanufactured Valve Body FD6F50E details

Ford 6F50 & 6F55 Identification Guide

Ford 6F50 valve bodies can be misidentified from 6T70 valve bodies. Further, 6F50 early and late units are almost identical in appearance and cannot be interchanged. It is critical when ordering a remanufactured valve body to know which unit is installed.

6F50 vs. 6T70 Series Valve Body Identification

Look for these features to distinguish 6F50/55 units from 6T70 series valve bodies.

6F50 & 6F55 Valve Body Front View
6F50 & 6F55 Valve Body Back View

Early vs. Late 3-5-R Clutch Regulator Valves

Look for these numbers on the side of the valve body to distinguish between early and late valve styles.


BSAA5P Number is for FD6F50L, ’09-Later, 1.83 Ratio 3-5-R Clutch Regulator Valve


BS7T4P Number is for FD6F50E, ’07–’09, 1.35 Ratio 3-5-R Clutch Regulator Valve