Warning:

  • 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.
  • This remanufactured valve body is updated to the six-checkball design. Some applications will require reprogramming to eliminate shift complaints. Reference tag on valve body and Tech & Install Tips for details.

6F50, 6F55

Remanufactured Valve Body
Part No. FD6F50L

Fits '09-later units with 1.83 ratio 3-5-R. Sold without transmission control module.

Tech & Install Tips Find a Distributor

Sonnax remanufactured valve body FD6F50L 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 assembly) 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 FD6F50L
  • 6F50, 6F55 Remanufactured Valve Body FD6F50L
  • 6F50, 6F55 Remanufactured Valve Body FD6F50L details

Ford 6F50 & 6F55 Identification Guide

Figure 1 — Front View
Figure 2 — Back View
Figure 3 — Side View

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