Automatic transmission made by Toyota subsidiary Aisin
The Aisin AW AF33 is a 5-speed automatic transaxle developed and manufactured in Anjo, Japan by Aisin AW, a division of Aisin. It is designed to be used in transverse engine configurations in both FWD and AWD configurations.
The actual model codes are "AW55-50SN" and "AW55-51SN". Manufactures have sometimes chosen own designations such as "AF23", "AF33" or "AF33-5" (GM), "RE5F22A" (Nissan and Infiniti) or "SU1" (Renault). Other manufacturers use the original designation(s) or minor variations of it such as "AW55-50 LE" (Volvo), "AW 55-51 LE" (Opel) and "FA57" (Saab).
Maintenance.
Several manufacturers list the transmission in their owners manuals as fill for life, meaning that there are no scheduled transmission fluid changes under normal operating conditions.
Transmission experts recommend regular fluid changes for severe driving condition, every . Specific fluid must be used. If incorrect fluid is used it could result in improper operation and lead to transmission damage.
Aisin recommends to follow the scheduled maintenance. A badly done oil change can destroy the transmission.
Reliability.
Some AF33 transmissions – specifically the variants used in Volvo vehicles – were very unreliable, with failures occurring within on some vehicles. Volvo eventually released an upgrade package to address the issue.
Fluid.
Fluid must meet the JWS 3309 specification. The fluid can be found under varying designations.
GM Saturn: Aisin AF23/33-5 type T-IV P/N 88900925
(in Canada, P/N 22689186).
Volvo AW55-50/51SN P/N 1161540-8.
Nissan RE5F22A Nissan Matic "K"
Fluid capacity 8.2 qt. (7.8L) Synthetic.
Exxon/Mobil manufactures a specific synthetic mineral fluid for this transmission simply called "3309".
Applications.
Ford Motor Company
 Ford
* 2008–2012 Ford Kuga 2.5T AWD
General Motors
 Chevrolet
* 2004–2009 Chevrolet Equinox (GM code M09 (FWD), M45 (AWD))
* 2006–2010 Chevrolet Captiva
* 2006-2007 Chevrolet Epica
 Opel / Vauxhall
* 2002–2004 Opel Vectra C
* 2002–2004 Opel Signum
* 2006–2015 Opel Antara
 Pontiac
* 2006–2009 Pontiac Torrent
 Saab
* 2003–2007 Saab 9-3
* 2002–2009 Saab 9-5
 Saturn
* 2002–2003 Saturn Vue
* 2003–2004 Saturn Ion (GM code M43)
Lancia
Nissan
Renault
Suzuki
Volvo
Notes.
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References.
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