Lincoln Corsair: Automatic Transmission - 8-Speed Automatic Transmission – 8F35/8F40 / Description and Operation - Transmission Description - Overview

Overview

This automatic transmission is a 8-speed transmission with electronic shift control. It is designed for operation in a transverse powertrain for FWD and AWD vehicles.

This transmission includes:

• Torque converter with converter clutch

• Eight forward speeds

• Four planetary gearsets

• One hydraulic SOWC

• Five friction clutches

• Main control valve body with eight solenoids

The transmission's hydraulic control system uses eight electronically controlled solenoids for:

• Shift feel (through line pressure control and shift pressure control)

• Shift scheduling and timing

• TCC operation

Identification Tags

Identification Tag Location

Transmission Identification Tag

Original Solenoid Body Tag

The solenoid body strategy is programmed into the PCM to control the shift, Line Pressure Control (LPC) and TCC solenoids to prevent harsh shifts. The solenoid body tag on the transmission case contains the 13-digit solenoid body strategy and the 12-digit solenoid body identification.

Replacement Solenoid Body Tag

When a new solenoid body is installed, a new solenoid body strategy file is downloaded into the PCM . A replacement solenoid body tag is supplied with the new solenoid body which contains the 13-digit solenoid body strategy and the 12-digit solenoid body identification. The new tag is placed over the original solenoid body tag.

Solenoid Band Number

The solenoids are calibrated from the factory and are not all the same. The solenoids can be replaced separately, but only with a replacement solenoid with an injector nozzle and band number that matches the solenoid being replaced. When solenoid(s) are replaced, the new solenoid band number must match the old solenoid band number. The band number is next to the two-dimensional matrix barcode on the side of the solenoid and will be a 1, 2, 3, 4 or 5.