AW55-50SN Overhaul Kit 1999, new and ready to install. Fits the AW55-50SN. Ships fast from the USA.
If you have a Volvo or Saab five-speed automatic on the bench, or an AW55-50SN that slips once it is hot, drips at the pan rail, or takes a long pause before it grabs Drive, this is the soft-parts kit that every rebuild starts with. The kit is cataloged for the AW55-50SN and AW55-51SN transmissions, plus the version Nissan calls the RE5F22A. The maker lists its coverage as 1999 and up, so a single kit works on units built over many model years. It is a new aftermarket kit made by Goldstar under their number 35802GSX.
The AW55-50SN is a transverse five-speed that applies its clutches and brakes with hydraulic pressure. That pressure comes from the valve body, and the solenoids decide where it goes. A circuit only does its job if it holds that pressure until the clutch is fully applied. The rubber and Teflon pieces in this kit are what hold it: piston seals on each clutch and brake piston, sealing rings on the rotating shafts and drums, plus the case, pan and cover gaskets and O-rings. After high mileage and a lot of heat cycles, those seals harden and shrink. Pressure then bleeds past them, so a clutch applies slowly or slips under load. Because no single part looks broken, the problem is easy to blame on the fluid or the computer.
To be clear about what you are buying: this is a gasket and seal set. It does not include friction plates, steel plates, a filter or solenoids. If the frictions are burned, buy them separately (see the parts list below).
On this transmission, P0750-P0770 shift solenoid performance codes and cold harsh shifts usually trace back to valve body bore wear, not to bad seals. Seals alone will not fix those symptoms. Our AW55-50SN service guide covers both failure patterns and tells you how to separate them.
Read the codes first, then check the fluid level and condition. Be careful under the car. On the AW55-50SN, the fill plug and the band anchor look almost alike. Loosening the anchor by mistake releases the band, and the car loses 3rd gear. If the unit slips only when hot and has no solenoid codes, it has lost apply pressure, and an overhaul with this kit, plus new frictions where needed, is the correct repair. If it flares and shudders with fresh fluid, inspect the valve body before you blame the seals. The Aisin slipping-under-load guide walks through that diagnosis step by step.
The listing covers the AW55-50SN, the AW55-51SN and the RE5F22A, 1999 and later. In North America, you will most often find this family in early-2000s Volvo S60, V70, S80 and XC90 models, and in the Saab 9-3 and 9-5. A 1999 model year car with a different gearbox will not use this kit, even though 1999 is the start of the catalog range. Confirm the transmission tag on the case or send us your year and VIN before ordering. See every part we carry for this family on the Aisin transmission parts page.
| Fits | AW55-50SN 1999 |
| Part type | Overhaul Kit |
| 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.
No. It is the gasket and seal set: piston seals, sealing rings, gaskets and O-rings. Frictions, steels and the filter are sold separately, or you can buy a master rebuild kit that bundles them.
Yes, the kit is cataloged for the AW55-50SN, AW55-51SN and RE5F22A, 1999 and up. Confirm the tag on your case or send your year and VIN, because some cars from those years used different gearboxes.
Usually not on its own. Those codes on this family typically point to worn valve body bores or solenoids. Seals fix lost apply pressure from hardened rubber. If the valve body is worn, it needs bore repair or replacement during the same rebuild.
Use the fluid listed for your vehicle. Volvo and Saab applications call for JWS 3309 (T-IV) or AW-1, depending on build date. GM-branded units use Dexron VI. Do not mix them up based on fluid color.
Yes. The fill plug and the band anchor look very similar on this transmission. Loosening the anchor by mistake drops the band and costs you 3rd gear, so identify the plug before turning a wrench.
