Main Control: Assembly

Main Control Upper Half 

NOTE: Many components and surfaces in the main control valve body are precision machined. Careful handling during disassembly, cleaning, inspection and assembly prevents unnecessary damage to machined surfaces.
Fig 1: Identifying Retaining Clips, Caps, Valves And Valve Springs
Courtesy of FORD MOTOR CO.
1. Install the retaining clips, caps, valves and valve spring into each bore.

   Main Control Lower Half 

NOTE: Many components and surfaces in the main control valve body are precision machined. Careful handling during disassembly, cleaning, inspection and assembly prevents unnecessary damage to machined surfaces.
Fig 2: Identifying Retaining Clips, Caps, Valves And Valve Spring
Courtesy of FORD MOTOR CO.
2. Install the retaining clips, caps, valves and valve spring into each bore.
NOTE: A Variable Force Solenoid (VFS) is calibrated from the factory and are not all the same. If replacing a VFS  , match the replacement solenoid type (normally high/normally low) and the band number with the original solenoid or harsh shifts or damage to the transmission can occur.
3. Inspect the solenoid screens for contamination and install new solenoids if needed. Lubricate the solenoid O-rings with clean transmission fluid.

   If replacing a solenoid, use the solenoid exploded view at the beginning of this procedure to identify what type of solenoid is being replaced. The solenoid can be a normally high VFS  , normally low VFS  or an ON/OFF solenoid.

   If replacing a VFS  , record the band number to get the correct part number for the solenoid.

   1. O-rings
   2. Screens
   3. Solenoid band number
      Fig 3: Identifying Solenoid Band Number, O-Rings And Screens

      Courtesy of FORD MOTOR CO.
4. Install the solenoids into their correct bores as indicated during disassembly.
   Fig 4: Identifying Solenoids

   Courtesy of FORD MOTOR CO.
5. Install the shift control solenoid hold down bracket and the 8 hold down bracket bolts.
   • Tighten to 6 Nm (53 lb-in).
     Fig 5: Remove/Install Solenoid Bracket Bolts

     Courtesy of FORD MOTOR CO.
NOTE: Toward the back of the upper valve body there is a hydraulic passage that is shaped as though it receives a check ball. This passage does not require a check ball. Be sure not to mistake this hydraulic passage for a passage that does require a check ball or damage to the transmission can occur.
6. Install the solenoid dampers, check balls, converter drain back valve and filter screens.
   1. Solenoid dampers
   2. Check balls
   3. Converter drain back valve
   4. Small filter screen
   5. Large filter screen
   6. Empty hydraulic passage (no check ball)
      Fig 6: Identifying Solenoid Dampers, Check Balls, Converter Drain Back Valve, Small And Large Screen

      Courtesy of FORD MOTOR CO.
7. Align the guide pins on the molded leadframe with the holes in the main control upper valve body and install the valve body onto the molded leadframe.
   1. Molded leadframe
   2. Main control upper valve body
   3. Guide pins
      Fig 7: Identifying Molded Leadframe, Main Control Upper Valve Body And Guide Pins

      Courtesy of FORD MOTOR CO.
NOTE: If the drain back valves are not installed correctly in the separator plate, damage to the transmission can occur.
8. Position the new main control separator plate on the main control upper valve body.

   Check the 2 drain back valves to be sure they are correctly positioned in the separator plate when the separator plate is pressed flush against the main control upper valve body.

   1. Main control separator plate
   2. Drain back valves
      Fig 8: Identifying Main Control Separator Plate And Drain Back Valves

      Courtesy of FORD MOTOR CO.
9. Position the main control lower valve body on the 2 molded leadframe alignment studs, align the manual valve with the Transmission Range (TR) sensor on the molded leadframe and install the main control lower valve body.
   1. Main control lower valve body
   2. Manual valve
   3. TR  sensor
      Fig 9: Identifying Main Control Lower Valve Body, Manual Valve And TR Sensor

      Courtesy of FORD MOTOR CO.
10. Install the 6 long molded leadframe-to-valve body bolts hand-tight.
    Fig 10: Locating Long Molded Leadframe-To-Valve Body Bolts

    Courtesy of FORD MOTOR CO.
11. Install the 19 short main control assembly lower-to-upper valve body bolts. Tighten the bolts in the sequence shown in illustration.
    • Tighten bolts 1 through 6 to 6 Nm (53 lb-in).
    • Tighten bolts 7 through 25 to 7 Nm (62 lb-in).
      Fig 11: Identifying Short Main Control Assembly Lower-To-Upper Valve Body Bolts Tightening Sequence

      Courtesy of FORD MOTOR CO.