Install Guide - 4F27E - Ford (Automatic Transmission)



• Compare replacement transmission and torque convertor to original before installation.
• Scan original vehicle computer, record any codes for later review and resolve all codes.
• Transmission cooler and lines must be hot flushed or replaced.
• Inspect flex plate closely and completely for cracks or damage; replace if necessary.
• Inspect crank pilot bearing for wear and apply a small amount of grease to aid with installation.
• Verify that both dowel pins are clean, installed properly, and are in good condition; this is critical for proper alignment.
• Check torque converter bolt length; too long of a bolt will damage the torque converter.
• Verify torque converter is properly and completely installed onto output shaft.
• Do not tighten bell housing with force; torque converter may have shifted during installation.
• Inspect mounts and axle shaft.
• Inspect and install PRNDL Neutral Safety Switch.
• Fill transmission with purchased synthetic or OEM-approved fluid.


Prior to installation of the replacement transmission, scan the vehicle for engine and transmission codes, record all codes, and resolve all engine codes. If you are not able to perform a scan, take the vehicle to a dealership. If any ABS or Speed Sensor codes are found, these issues must be resolved prior to transmission replacement.

The entire transmission cooling system must be completely cleaned, flushed, and flow tested. If the cooler is plugged, it must be replaced. A restricted and/or contaminated cooling system is the leading cause of transmission failure after replacement.

Inspect the transmission wiring harness for damaged wires or connectors. Verify proper function of the entire electrical system, including the battery, alternator, and, most importantly, the vehicle grounds.

This is an electronically-controlled transmission with a complex shift adapt system. The following information is very important to understand and perform correctly. Failure to do so may cause damage to your new transmission and/or cause performance problems.

The TCM must be recalibrated; disconnecting the battery is not sufficient. Your local dealership can perform this for a nominal charge. Do not attempt if you do not have the proper equipment.

Visit Ford’s site to verify that the vehicle’s TCM has the latest software, updates, and calibrations to esure proper operation and shift quality.

A final system scan is required after the road test or if problems are detected during the test drive. If codes are present, compare to original codes to diagnose or call the tech line for help.

Updated Rear Cover
Due to premature rear cover failures in most Mazda applications, all of our remanufactured 4F27E (FN4A-EL) transmissions are updated with the improved Ford-designed rear cover.

The cooler return line must be relocated from the case to the end cover. During remanufacturing, the transmission is internally updated and the factory cooler line hole in the case is permanently sealed – all Ford applications will remain
unmodified. Mazda units are updated to accept Mazda factory cooler line fittings (M14 x 1.50).


If you install the return cooler fitting into the original case location there will be no lubrication provided to the rear of the
transaxle and immediate failure will result and is not covered under your warranty.

Applicable Models:

  • Ford EcoSport with 2.0L Duratec engine
  • 2000 Ford Focus
  • 2001 Ford Focus
  • 2002 Ford Focus
  • 2003 Ford Focus
  • 2004 Ford Focus
  • 2005 Ford Focus
  • 2006 Ford Focus
  • 2007 Ford Focus
  • 2008 Ford Focus
  • 2009 Ford Focus
  • 2010 Ford Focus
  • 2011 Ford Focus
  • Mazda3
  • Mazda6
  • Ford Transit Connect with 2.0L Duratec 2010–2013
  • Mazda2
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