Lincoln Corsair: Automatic Transmission - 8-Speed Automatic Transmission – 8F35/8F40 / Removal and Installation - Main Control Valve Body

Removal

1. Remove the main control cover.
   Refer to: Main Control Cover (307-01A Automatic Transmission - 8-Speed Automatic Transmission – 8F35/8F40, Removal and Installation).
   Refer to: Main Control Cover (307-01A Automatic Transmission - 8-Speed Automatic Transmission – 8F35/8F40, Removal and Installation).
   

1. Unlock and disconnect the OSS sensor electrical connector.
   

1. Unlock and disconnect the TR sensor electrical connector.
   

1. NOTE: Note the location of the short and long main control valve body bolts for assembly.

   Remove the main control valve body bolts. Remove the main control valve body and transmission wiring harness assembly.
   

Installation

1. Verify the A (1, 2, 3, 4, 5), C (3, 7), F (2, 8), and the D (SOWC) clutch main control valve body case seals are in place.
   

1. NOTE: Note the location of the short and long main control valve body case bolts. Tighten the main control valve body bolts in the sequence shown.

   NOTE: Verify the manual lever is positioned in the main control valve.

   Install the main control, the transmission wiring harness and the main control bolts.
   Torque:
     Stage 1:  44 lb.in (5 Nm)
     Stage 2:  62 lb.in (7 Nm)

1. Install the wiring harness connector bolts.
   Torque: 71 lb.in (8 Nm)

1. Connect and lock he TR sensor electrical connector.
   

1. Connect and lock the OSS sensor electrical connector.
   

1. Install the main control cover.
   Refer to: Main Control Cover (307-01A Automatic Transmission - 8-Speed Automatic Transmission – 8F35/8F40, Removal and Installation).
   Refer to: Main Control Cover (307-01A Automatic Transmission - 8-Speed Automatic Transmission – 8F35/8F40, Removal and Installation).
   

1. If a replacement transmission assembly is being installed or a new main control valve body is installed, the PCM must be reflashed with a new solenoid body strategy and identification data file.
   Refer to: Transmission Strategy Download (307-01A Automatic Transmission - 8-Speed Automatic Transmission – 8F35/8F40, General Procedures).
   

1. NOTE: The 13-digit solenoid body strategy number displayed on the scan tool must match the solenoid body strategy number etched on the main control. If the numbers do not match, damage to the transmission or drivability concerns can occur.

   NOTE: If the new main control was not supplied with a replacement solenoid strategy idenification tage, DO NOT INSTALL the main control as all required programming information is missing.

   Verify the new main control software file solenoid strategy on the casting matches the new service solenoid body replacement tag.
   

1. If a new main control valve body is installed, install a new solenoid body identification tag.