AW55-50SN Pressure Control Solenoid 2000, new and ready to install. Fits the AW55-50SN. Ships fast from the USA.
Owners of a Volvo S60, V70, S80 or XC90, a Saab 9-3 or 9-5, a Nissan Altima or Maxima with the RE5F22A, or a Saturn Vue, Chevrolet Equinox or Malibu with the AF33-5 usually land here after the same complaints: a thump into Drive, a harsh or flared 2-3 shift, a lockup clutch that will not hold steady at highway speed, or a transmission that suddenly shifts hard everywhere after a pressure code. This listing is the Rostra 52-9036 linear solenoid set, the three pressure-control solenoids for the Aisin Warner AW55-50SN family: SLT (line pressure), SLS (shift pressure) and SLU (lockup), supplied on their mounting bracket. It is new, not rebuilt, and it ships from the USA.
The AW55-50SN uses two kinds of solenoids. Simple on/off solenoids move the shift valves to pick a gear, while these three linear solenoids decide how hard each clutch is squeezed. The TCM pulses them with a duty cycle; Sonnax lists the family at about 300 Hz and 10 to 40 percent duty, which is why they behave like dimmer switches rather than light switches. SLT builds the throttle-based signal that drives main line pressure. SLS, a normally open solenoid, controls clutch feed pressure through the shift pressure control valve, so it sets how each shift feels. SLU, normally closed, applies the torque converter clutch and also handles B-4 servo apply and B-2 neutral control. A solenoid modulator valve feeds all three and limits their top pressure. Because they share one feed, a worn modulator bore can make three good solenoids look bad.
Read the TCM codes and write them down before clearing anything. Check fluid level carefully by the factory procedure; on this unit both low and overfilled fluid upset linear solenoid control by themselves. Measure each solenoid at its connector: Rostra rates the 52-9036 solenoids at 5.3 ohms, and Sonnax gives 5.0 to 5.6 ohms for the family, so a reading well outside that range is a clear fail. A coil that measures fine can still have a sticking valve, so the next step is pressure testing. Our AW55-50SN service guide covers the valve body wear that mimics bad solenoids, and the Aisin harsh and delayed shift walkthrough helps rule out fluid, mounts and software first.
The Rostra 52-9036 set is catalogued for the AW55-50SN, AW55-51SN, AF33-5 and RE5F22A, with a 2000-2014 year range. That covers the Volvo and Saab five-speed cars from the 2000s, the RE5F22A Nissan V6 sedans, and the GM AF33-5 applications. This listing carries a 2000 year tag, but the set is the same across that range, so the year on the title is not the deciding factor. What does matter is the linear solenoid style. Sonnax documents early and late SLT and SLS versions: early ones use a narrow bracket with a 1.408 inch short manifold and connector up, and late ones use a wider bracket with a 1.510 inch long manifold, with the late SLT connector facing down and needing the updated Volvo harness. SLU stayed the same. Before ordering, pull your old solenoids or check the bracket width and connector direction, and if in doubt send us your year, vehicle and VIN. All AW55-family parts we stock are on the Aisin transmission parts page.
If the pan is full of friction material, solenoids will not fix it; a AW55-50SN master rebuild kit is the place to start, and scored bores call for a replacement AW55-50SN valve body.
| Fits | AW55-50SN 2000 |
| Part type | Pressure Control Solenoid |
| Condition | New |
| Brand | OEM |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
Three linear solenoids on a bracket: SLT for line pressure, SLS for shift pressure and SLU for the torque converter lockup clutch. It is the Rostra 52-9036 set. The on/off shift solenoids are not included.
The 52-9036 is catalogued for the RE5F22A, which is the Nissan-labeled version of this Aisin five-speed, as well as the AW55-50SN, AW55-51SN and AF33-5. Confirm your transmission code and compare the bracket and connector direction against your old solenoids.
Rostra rates these solenoids at 5.3 ohms, and Sonnax lists 5.0 to 5.6 ohms for the AW55-50SN family. Test at the solenoid connector; a reading far outside that range means a bad coil or wiring.
You can, but Sonnax notes the linear solenoids are calibrated to the valve body, and swapping single used units between cores often leaves a shift quality problem. Replacing all three together on your own valve body is the more reliable repair.
Yes. Clear the codes and give the TCM several drive cycles, or run the adaptation routine with a capable scan tool, so it can relearn shift pressures with the new solenoids.
