AW55-50SN Valve Body 2004-06, remanufactured and ready to install. Fits the AW55-50SN. Ships fast from the USA.
A 2004, 2005 or 2006 Saturn Vue, Saab 9-3 or Volvo running the AW55-50SN that shudders at cruise like a slipping torque converter, bangs into gear, or trips a pressure-control or TCC solenoid code is usually dealing with a worn valve body, not a transmission that needs to come out. This remanufactured valve body is built to the 2004-06 window specifically, which was a GM-influenced run of this Aisin Warner transaxle shared across Saturn, Saab and Opel/Vauxhall platforms during those model years.
Inside the AW55-50SN, the valve body is the part that turns the computer's shift commands into actual hydraulic pressure. Line pressure flows through its precision bores and spool valves to apply each clutch pack and band, and the pressure-control and TCC solenoids mounted on the valve body are what the transmission control module pulses to time lockup and every shift event. As the bores wear, the solenoids can no longer hold a clean, consistent pressure, and the torque converter clutch is usually the first thing to show it as a shudder at steady speed.
Scan for codes and note whether the complaint is a steady-speed shudder, a shift-quality problem, or both, since that split points toward either the TCC circuit or the broader valve body depending on what else is happening. Our AW55-50SN service guide breaks down how Sonnax's diagnosis notes separate a solenoid-only fault from the bore wear that forces a full valve body replacement, which is worth reading before you commit to either repair.
This valve body is cast to the 2004-06 AW55-50SN used in Saturn Vue, Saab 9-3 and Volvo applications during that window, and it will not be the correct casting for a 2001-2003 or a 2007-and-later build. Confirm your old unit's casting marks and connector count against this listing, or send your year and VIN, before ordering. If your vehicle falls outside 2004-06, the 2000-2008 version covers the wider range, and the 2004-2007 version extends one additional model year.
Change the fluid and filter alongside the valve body, using JWS 3309 or a full-synthetic ATF built to that spec, and torque the bolts in the factory sequence rather than just snugging them down evenly by eye. Run the adaptive relearn once the vehicle has a few drive cycles on it so the computer stops using pressure values it learned from the worn part. If the TCC shudder was the main complaint, a fresh TCC solenoid or the 8-piece solenoid set installed alongside the valve body gives the new unit a clean set of solenoids to work with instead of pairing it with ones that already have hours on them.
| Fits | AW55-50SN 2004-06 |
| Part type | Valve Body |
| Condition | Remanufactured |
| 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.
A worn valve body loses the ability to hold a clean, consistent pressure at the TCC solenoid circuit, which the torque converter clutch translates into a shudder or vibration at steady speed. It is one of the most common early symptoms on this transaxle family.
No, this listing is the valve body casting and internal valves only. For a fully equipped unit, see the valve body with solenoids version.
Primarily Saturn Vue, Saab 9-3 and Volvo models built in that window, which shared this Aisin Warner transaxle across GM and Volvo/Saab platforms during those years.
If the main complaint was a TCC shudder, yes — pairing a fresh TCC solenoid or the full 8-piece solenoid set with the new valve body avoids reusing worn solenoids that could carry the same symptom into the new part.
JWS 3309 or an equivalent full-synthetic ATF built to that specification. Q8Oils' published data sheet cross-references JWS 3309 against the Volvo and GM part numbers used on this transaxle family.
Yes. The control module has learned pressure and timing values from the old, worn valve body, and a relearn after the first drive cycle resets those so the new part shifts cleanly instead of feeling harsh.
