Master rebuild kit for the Ford 4F27E / Mazda FN4A-EL 4-speed with overhaul kit, plate kit, band, filter and pump bushing.
A Focus, Transit Connect or Mazda3 with the four-speed automatic that flares on the 2-3 shift, loses 2nd gear, or sets a converter clutch code when it gets hot usually needs more than a fluid change. This master kit is for the Ford 4F27E, which Mazda calls the FN4A-EL. It includes an overhaul gasket and seal kit, a clutch plate kit, a new band, a new filter and a pump bushing. That pump bushing makes this kit different from a plain overhaul set: on this unit a worn bushing leaks converter clutch oil and causes problems a new set of clutches alone will not fix.
The 4F27E is a front-drive transaxle with two planetary gearsets, built as a strengthened version of the older F-4EAT. It runs ratios of 2.81, 1.50, 1.00 and 0.73. Six electronically controlled solenoids handle line pressure, shift timing and converter clutch apply, but the actual work is done by the clutch packs and the 2-4 band, which hold 2nd and 4th. This kit renews all of those friction surfaces and every gasket and seal that keeps apply pressure where it belongs. The pump bushing matters most for converter lockup. Transmission Digest explains that the rear pump-stator bushings support the turbine shaft and forward clutch drum, and they also act as seals for the converter clutch apply circuit. As they wear, apply pressure drops, and the leak gets worse as the fluid heats and thins.
P0741 is often described as converter clutch "stuck off," which sends people to replace the solenoid first. Transmission Digest recommends working out how the code set: the computer compares engine speed with input shaft speed and flags excessive lockup slip. Speed sensors, the solenoid, worn valve body bores and low line pressure can all cause it, but the pump-stator bushing leak is the most common. The 4F27E valve body also wears its bores, which can cause wrong-gear starts and lost 2nd with clean fluid. Read live data as described in how to read transmission live data and see converter hub and pump bushing wear. Burnt fluid and debris mean this kit; a clean pan with shift complaints points to the solenoids or the valve body.
The listing names the 2000-2018 Focus 2.0L and 2.3L, the 2010-2013 Transit Connect 2.0L, and Mazda 3, 5, 6 and Tribute 2.3L applications, with interchange references K71900KP, K71900KPX and XS4Z-7D034-AB. Be careful with the Focus years. In North America the 4F27E was used in the 2000-2011 Focus, and the 2012 and later automatic Focus uses a dual-clutch unit that this kit does not fit. Confirm the transmission tag and send us the year and VIN if you are unsure. See all 4F27E parts on our 4F27E parts page.
| Transmission | Ford 4F27E / Mazda FN4A-EL 4-speed FWD |
| Listed fitment | 2000-2018 Focus 2.0L/2.3L, 2010-2013 Transit Connect 2.0L, Mazda 3/5/6 and Tribute 2.3L |
| Kit contents | Overhaul kit, plate kit, filter, band, pump bushing |
| Interchange | K71900KP, K71900KPX, XS4Z-7D034-AB |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
No. North American Focus models from 2012 on use a dual-clutch automatic, not the 4F27E. The 4F27E was used in the 2000-2011 Focus. Check the transmission tag or send us your VIN.
On the 4F27E the rear pump-stator bushings also seal converter clutch apply oil. When they wear, the lockup slips and P0741 sets, mostly when the fluid is hot. Replacing the bushing during the rebuild prevents that.
Ford models take Mercon V through 2007 and Mercon LV from 2008, and Ford later approved LV for the earlier units. Mazda models use Mazda M5 fluid, also sold as Idemitsu Type M. Do not mix them.
Yes. FN4A-EL is Mazda's name for the 4F27E. Calibrations and fluid differ between the brands, so match the tag and use the fluid for your vehicle.
Yes. Clear the adaptive values with a scan tool after the rebuild and drive the vehicle through every gear, gently at first, so the computer can relearn shift pressures for the new clutches.
