TC Remanufacturing F577L2AA Automatic Transmission Torque Converter

Automatic Transmission Torque Converter

This TC Remanufacturing automatic transmission torque converter, part number F577L2AA, is built for Ford and Mercury applications that use the specified 10.930-inch lock-up design. It is a direct-fit replacement for vehicles that require the 7L2AA converter code, 21-spline connection, and 9.250-inch bolt circle.

Key Features

• Part number: F577L2AA
• Automatic transmission torque converter with lock-up design
• 10.930-inch converter diameter
• 9.250-inch bolt circle
• 4-stud mounting type with 3/8 x 24 mounting thread size
• 21-spline count
• Medium stall characteristics
• 10-vane stator
• Flats / stepped hub type
• Pilot diameter: .750/.825; pilot length: 1.550
• No ring gear
• Do not interchange with F57SDAA

Detailed Description

F577L2AA is a remanufactured automatic transmission torque converter for Ford Ranger, Ford Explorer, Ford Explorer Sport Trac, Ford Mustang, Mercury Mountaineer, and Mazda B4000 applications listed in the fitment data. It is specified with a lock-up converter type, medium stall, 10-vane stator, and a 21-spline interface to match the transmission and engine package used in these vehicles. The 9.250-inch bolt circle and 4-stud mounting pattern are important identifiers for correct installation, especially on Ford Ranger and Ford Explorer applications that require this configuration.

This part number also cross-references the 7L2AA converter code for the same application. Use F577L2AA when replacing a worn or failing torque converter in 2006-2011 Ford Ranger, 2007-2010 Ford Explorer, 2007-2010 Ford Explorer Sport Trac, 2005-2010 Ford Mustang, 2007-2010 Mercury Mountaineer, and 2007-2008 Mazda B4000 applications, along with the earlier Ford Ranger, Explorer, Explorer Sport, and Explorer Sport Trac fitments shown below.

What It Helps Address

• Torque converter shudder during lock-up operation
• Slipping or delayed engagement in the automatic transmission
• Vibration or drivability issues tied to converter wear
• Incorrect fitment from using a converter with the wrong bolt circle or spline count
• Noise or performance problems caused by a damaged internal stator or hub

Installation Notes and Tips

• Verify the 9.250-inch bolt circle before installation.
• Confirm the 21-spline count, 4-stud mounting type, and 3/8 x 24 thread size match the original unit.
• Check the converter code 7L2AA and compare the existing unit to avoid interchange errors.
• Do not interchange with F57SDAA.
• Inspect the transmission, cooler, and fluid condition before installing a replacement converter.

Quality Assurance

TC Remanufacturing remanufactures this torque converter to match the listed application specifications, including diameter, hub style, pilot dimensions, and mounting configuration. Confirm fitment against the vehicle listing and converter identifiers before installation.