Remanufactured A6MF1/A6MF2 valve body with all eight solenoids mounted, for 6-speed Hyundai Sonata, Santa Fe, Tucson and Kia Optima, Sorento.
Hyundai and Kia owners shopping for this part usually describe the same thing: a bang on the 2-3 or 3-4 upshift, a hard kick on downshifts, a flare between gears, a long pause before Drive engages, or a check engine light with solenoid codes in the P0750-P0770 range or P0748. This is a remanufactured valve body for the A6MF1 and A6MF2 six-speed transaxles, supplied with all eight shift and pressure control solenoids installed and the manual valve detent lever in place.
These six-speeds rely on solenoid-controlled clutch-to-clutch shifting. The transmission control module commands a mix of on/off shift solenoids and variable force solenoids, and the valve body uses switch valves to route their pressure to the right clutch at the right moment. That design makes the shifts very sensitive to valve and solenoid condition. A published shop case on a 2011 Kia Forte shows how little it takes: a broken tab on a solenoid retainer bracket let Shift Solenoid A move out of position, the low/reverse clutch applied on the 3-4 shift, and the car felt like it hit a wall. Worn bores and tired solenoids create the same kind of mistimed apply on a smaller scale, which is why new solenoids alone often do not cure a worn unit.
Start with the fluid level and condition, since low or degraded SP-IV causes many of the same complaints. Pull codes, then watch commanded versus actual gear and solenoid duty in live data during a road test; our guide to reading transmission live data shows what to look for. Check solenoid resistance at the case connector following our solenoid multimeter test. If a solenoid fails electrically and the fluid is clean, a single eight-piece A6MF1 solenoid kit may be enough. If the solenoids test good and the shifts are still harsh or flaring, the bores are worn and the complete valve body is the fix.
The listing covers 2009-on six-speed A6MF1 and A6MF2 applications, including the Hyundai Sonata, Santa Fe, Tucson, Elantra, Azera/Grandeur and Veracruz, and the Kia Optima/K5, Sorento, Forte, Carens, Sedona/Carnival and Cadenza/K7, in FWD, AWD and 4x4 versions. The A6LF longitudinal units are not covered by this part. Model years, engines and solenoid connectors vary across this long list, so compare the new body to your old one and confirm your transmission code before ordering, or send us your year and VIN. You can browse other transmission families from our shop by transmission page.
Drain the fluid and drop the pan, unplug the solenoid connectors, remove the valve body bolts and lower the assembly. Before the new body goes up, confirm every solenoid retainer bracket is intact and each solenoid is fully seated. Torque the bolts in sequence to spec, install a new filter and pan gasket, and refill only with genuine-specification SP-IV. Run a TCM adaptive reset or relearn afterward so shift quality settles. If the old fluid was full of friction material, the clutches have been damaged and a A6MF1/A6MF2 master rebuild kit belongs on the same job. The listing states this unit carries a 6 month, unlimited mile warranty and manufacturer part number DMA6MF.
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Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
No. It is listed for the A6MF1 and A6MF2 front-wheel-drive based six-speeds. The A6LF longitudinal units are not covered.
Yes. All eight shift and pressure control solenoids come installed on the valve body, along with the manual valve detent lever.
Hyundai/Kia SP-IV automatic transmission fluid. Do not substitute a universal fluid, because shift quality on these units depends on the friction characteristics of SP-IV.
On most of these vehicles, yes. Perform a TCM adaptive reset or relearn with a capable scan tool so the module stops compensating for the worn valve body it learned on.
Not always. A mispositioned shift solenoid, low fluid or a worn clutch can cause it. Check fluid, codes and solenoid resistance first; if those pass, the valve body is the likely cause.
