Complete A6MF1 valve body with the shift solenoids already installed, for Hyundai Sonata, Santa Fe and Tucson and Kia Sorento, Optima and Sportage.
Harsh or banging 2-3 and 3-4 shifts, a long delay before the Hyundai or Kia 6-speed engages after a cold start, torque converter clutch shudder at light throttle, or a drop into limp mode with the transmission stuck in one gear - on the A6MF/A6LF family, those complaints trace back to the valve body and its shift solenoids more often than anything else in the case. This is the complete valve body assembly for the A6MF1/A6MF2 and the related A6LF1/A6LF2/A6LF3, with the shift solenoids already mounted.
The A6MF/A6LF is a 6-speed front-wheel-drive electronic automatic used across the Hyundai Sonata, Santa Fe, Tucson and Azera, and the Kia Sorento, Optima, Sportage and Cadenza. The valve body routes line pressure to each clutch pack through a set of reducing valves that feed the shift solenoids a regulated pressure. TransGo's technical documentation on this case notes that it uses two reducing valves which commonly wear out their bores; when feed pressure to the solenoids drifts out of spec, the solenoids can no longer deliver the correct pressure even if they are otherwise good.
Sonnax's technical documentation for this reducing-valve bore wear condition covers the A6MF1/A6MF2 and A6LF1/A6LF2/A6LF3 together, describing wear at the pressure regulator bore that causes high line pressure, harsh shifts and overheating from reduced cooler and converter flow. Because the wear is in the body's bores and not isolated to one electrical solenoid, replacing the solenoids alone on a worn body typically does not resolve a persistent harsh-shift or shudder complaint - the complete assembly is the repair that addresses both the mechanical wear and the solenoids in one step.
This casting is shared across the A6MF1, A6MF2, A6LF1, A6LF2 and A6LF3, which Hyundai and Kia used across the 2009-2017 Sonata, 2009-2017 Santa Fe, 2009-2017 Tucson, 2011-2017 Azera and the 2011 Veracruz, and the 2011-2017 Sorento, 2012-2014 Optima, 2010-2014 Sportage and 2014-2017 Cadenza. Hyundai and Kia revised this transaxle across those years, so confirm the transaxle code stamped on your unit, or match it to your VIN, before ordering.
Drop the pan and filter, unplug the internal harness connector, free the manual valve link, and back the valve body bolts out working from the outside in so the separator plate doesn't cock - note the bolt lengths, since they vary by position. Set the new assembly with the manual valve engaged to the detent lever before starting any bolts, then torque in a criss-cross pattern from the middle out. Refill with SP-4 ATF to the correct level at operating temperature. If you're also chasing clutch or seal wear on a higher-mileage unit, pair the valve body with our A6MF1/A6MF2 master rebuild kit or, on the Sonata-specific A6LF1, the A6LF1 master rebuild kit. For units where only the solenoids are suspect on an otherwise sound body, see our standalone 8-piece A6MF1 solenoid kit. If pump wear is also present, our remanufactured A6MF1 oil pump covers that separately. Reset the TCM adaptive values with a scan tool before the road test - skipping it is the usual reason a good valve body still shifts roughly for the first few hundred miles.
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Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
The A6MF1, A6MF2, A6LF1, A6LF2 and A6LF3 transaxle family, used in the 2009-2017 Hyundai Sonata, 2009-2017 Santa Fe, 2009-2017 Tucson, 2011-2017 Azera, 2011 Veracruz, 2011-2017 Kia Sorento, 2012-2014 Optima, 2010-2014 Sportage and 2014-2017 Cadenza. Confirm your transaxle code or VIN before ordering, since Hyundai and Kia revised this unit across those years.
Yes, this assembly ships with the shift solenoids already mounted and matched to the valve body.
Sonnax's technical documentation on this transaxle ties the common harsh-shift and overheating complaints to bore wear in the valve body itself, not just the solenoids. Replacing a solenoid on a worn body usually leaves the underlying pressure problem in place.
SP-4 ATF, the Hyundai/Kia specification for this transaxle family. Do not substitute a generic ATF.
Yes. Reset the TCM adaptive values with a scan tool before the road test, or shift quality can stay rough for the first few hundred miles even with a good valve body installed.
