The Ford 8F57 transmission is a sophisticated 8-speed automatic transmission designed for high-torque applications in vehicles like the Ford Edge ST. This article provides a detailed overview of the key OEM (Original Equipment Manufacturer) parts of this advanced transmission system.

Transmission Assembly

• Part Number: K2GZ-7000-A
• Description: Complete 8F57 transmission assembly
• Application: 2019-2023 Ford Edge with 2.7L EcoBoost V6 engine

The transmission assembly is the core component, containing all the internal parts necessary for the 8F57’s operation. It can handle up to 575 Nm of engine torque, making it suitable for high-performance applications.

Planetary Gear Sets

The 8F57 uses a unique configuration of planetary gear sets to achieve its eight forward speeds:

• Overdrive Planetary Set
• Reaction Planetary Set
• Output Planetary Set
• Final Drive Planetary Set

These gear sets combine to provide the various gear ratios, with the Overdrive and Reaction planetaries working together for some of the gear changes.

Clutch Packs

The 8F57 utilizes several clutch packs to engage and disengage different gear ratios:

• Input Clutch
• Direct Clutch
• Overdrive Clutch
• Low/Reverse Clutch
• 3-7 Brake Clutch

Each clutch pack consists of multiple friction plates and steel plates precisely engineered to handle the torque loads of the transmission.

Valve Body

• Part Number: (Specific part number varies by application)
• Description: Hydraulic control unit

The valve body in the 8F57 is based on the Casting Integrated Direct Acting Solenoids (CIDAS) layout, similar to that used in Ford’s 10-speed transmissions. It houses several key components:

• Pressure control solenoids
• Shift solenoids
• Temperature sensors
• Pressure switches

Transmission Control Module (TCM)

• Part Number: (Varies by vehicle application)
• Description: Electronic control unit for the transmission

The TCM uses Ford’s TRIECS control software, adapted from the 10-speed transmission platform. It manages all aspects of the transmission’s operation, including shift timing, pressure control, and adaptive learning.

Selectable One-Way Clutch

• Description: Electrically activated one-way clutch

This innovative component reduces drag by eliminating the need for a large reverse reaction clutch. The 8F57 is electrically activated, unlike the hydraulically activated version of the 8F35.

Oil Pump

• Description: Variable vane-pivoting pump

The 8F57 uses a variable vane-pivoting pump, shared with the larger GM GF9 platform and proven in the earlier 6F50 platform. This pump design contributes significantly to the transmission’s fuel efficiency.

Start-Stop System Components

• Description: Internal electric pump

To support the vehicle’s start-stop functionality, the 8F57 incorporates an internal electric pump. This pump is similar to the start-stop pump used in Ford’s 10-speed transmissions and differs from the external accumulator type used in the smaller 8F24 and 8F35 transmissions.

Torque Converter

• Part Number: (Varies by specific application)
• Description: Lockup-style torque converter

The torque converter can handle the high torque output of engines like the 2.7L EcoBoost V6. It features a lockup clutch for improved efficiency at highway speeds.

Case and Housing

• Material: Aluminum alloy
• Description: Main housing for all internal components

The transmission case provides rigidity while minimizing weight, contributing to overall vehicle efficiency.

Maintain Performance and Reliability

The Ford 8F57 transmission represents a significant advancement in automatic transmission technology. Its OEM parts are carefully designed and manufactured to provide smooth operation, fuel efficiency, and durability in high-torque applications. When servicing or repairing this transmission, it’s crucial to use genuine Ford OEM parts to maintain the transmission’s performance and reliability.

Always consult the latest Ford parts catalogue or contact an authorized Ford dealer for specific part numbers and availability, as part numbers and specifications may vary based on the exact vehicle model and year.