Remanufactured A4CF1 and A4CF2 valve body with solenoids for Hyundai Elantra, Elantra Touring, Solaris and Kia Spectra four-speed automatics.
A bang into second gear, a flare between gears under light throttle, a long pause before the car actually moves after you put it in Drive, or the transmission dropping into limp mode and holding third gear with a shift solenoid or gear ratio code stored - these are the textbook complaints on the A4CF1 four-speed automatic, and almost all of them trace back to the valve body. This is a remanufactured, complete A4CF1/A4CF2 valve body with the solenoids already installed, sold as one assembly rather than a bare casting you have to source parts for separately.
The A4CF1 is a conventional four-speed automatic, not a CVT - it uses planetary gearsets and clutch packs to produce its four ratios, and the valve body is the hydraulic control center that decides which clutch gets line pressure at which moment. Solenoids mounted on the valve body open and close in response to the TCM, and the aluminum bores inside the valve body carry that commanded pressure to the clutch packs and the torque converter clutch. On this family of transmissions, the valve body's pressure regulator and pressure-reducing valve bores are known weak points - the regulator valve oscillates constantly in normal operation, and that motion wears the bore oval over tens of thousands of miles. Once the bore is worn, the solenoids can be perfectly healthy and the transmission will still misbehave, because the hydraulic circuit feeding them has lost its seal.
Before condemning the valve body, it is worth knowing the difference between a flare and an outright slip, since they point to different repairs - our guide on telling shift flare apart from slip covers that distinction. On the A4CF1 specifically, the internal wiring "ribbon" that carries signals between the solenoids and the case connector is also a documented failure point, so a bad connection can mimic a bad valve body - check continuity at the connector before you assume you need this part.
This valve body is built for the A4CF1/A4CF2 four-speed automatic used in the Hyundai Elantra, Elantra Touring, Solaris, and the Kia Spectra, but Hyundai revised this unit more than once across its production run. Before you order, pull the pan and compare the casting number on your existing valve body against this part, or send us your year, trim and VIN and we'll confirm the match. A casting match is the only reliable way to be sure, since the external bolt pattern looks the same across revisions even where the internal porting does not.
Drop the pan, pull the filter, and unplug the solenoid harness at the case connector before touching a single bolt. Back the valve body bolts out in a spiral from the outside in, not a straight line, so the separator plate underneath doesn't warp as clamping pressure comes off unevenly - note the length of each bolt as it comes out, since they are not all the same and a long bolt dropped into a short hole can crack the casting. Transfer the case connector and manual valve link to the new body, set it on a fresh gasket, and torque the bolts down in the reverse of the removal pattern. Install a new filter and pan gasket while you're in there, and if the clutches are also worn from running low on pressure, an A4CF1 master rebuild kit covers the frictions and seals in the same job. Reman valve bodies ship dry, so refill and check the level hot with the engine running - these units read as slipping if the fluid is even slightly low. Prime the new body by cycling the shifter through every position with the fluid at operating temperature, clear the stored codes, and drive it through a few cycles so the adaptive shift tables rebuild from a clean slate. If your original cooler lines show any discoloration or debris, a new Elantra transmission oil cooler keeps contaminated fluid from working its way back into the fresh valve body, and while you're under the car it's worth checking the Elantra automatic shifter cable for play if the lever position has ever felt sloppy or mismatched to the gear actually selected. For general background on what a healthy valve body should look like inside, our guide on valve body cleaning and inspection is worth a read before your next fluid service.
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It fits Elantras built with the A4CF1/A4CF2 four-speed automatic, which Hyundai revised more than once. Match the casting number on your original valve body to this part before ordering, or send us your year and VIN to confirm.
It's a remanufactured, complete assembly with the solenoids already installed. It ships dry, so plan to refill with fluid after install.
Possibly, but check the internal wiring ribbon and the case connector pins for corrosion or a loose fit first. That ribbon is a documented failure point on this transmission and can cause the same symptoms as a worn valve body.
A new filter and pan gasket at minimum. If the clutches are also slipping from long-term low pressure, pair it with a master rebuild kit, and replace the transmission oil cooler if the old fluid showed debris.
Yes. Refill and check the level hot, cycle the shifter through every position with the engine at temperature to prime the body, clear the stored codes, and drive through a few cycles so the TCM relearns its shift tables.
