The Aisin AW91-40LS 4-speed automatic transmission was produced from 2000 to 2015 and installed in popular American Scion models paired with the 2.4-liter 2AZ-FE engine. This automatic transmission was installed in front-wheel drive Toyota models under its own designation, the U241E.
Specifications
| Type | automatic transmission |
| Number of gears | 4 |
| Type of drive | front |
| Engine volume, l | up to 2.5 |
| Torque output, Nm | up to 240 |
| Recommended oil | Toyota ATF Type T-IV since 2006 Toyota ATF WS |
| Oil capacity, liter | 8.5 |
| Partial replacement, liter | 4.0 |
| Maintenance | every 60 000 km |
| Gearbox lifespan, km | ~300 000 km |
| Weight, kg | 91 |
Gear ratios Aisin AW91-40LS
Using the example of a 2008 Scion xB with a 2.4 liter engine:
| Main | 2.74 |
| 1st | 3.943 |
| 2nd | 2.197 |
| 3rd | 1.413 |
| 4th | 1.020 |
| Reverse | 3.145 |
Using
The transmission was installed on:
- Scion xB 2 (E150) in 2007 – 2015
- Scion tC 1 (AT10) in 2004 – 2010
- Toyota Alphard 1 (AH10) in 2002 – 2008
- Toyota Avensis 2 (T250) in 2003 – 2008
- Toyota Camry 5 (XV30) in 2001 – 2006
- Toyota Camry 6 (XV40) in 2006 – 2011
- Toyota Camry 7 (XV50) in 2011 – 2014
- Toyota Estima 2 (XR30) in 2000 – 2005
- Toyota Estima 3 (XR50) in 2006 – 2010
- Toyota Harrier 1 (XU10) in 2000 – 2003
- Toyota Harrier 2 (XU30) in 2003 – 2008
- Toyota Highlander 1 (XU20) in 2000 – 2007
- Toyota Ipsum 2 (XM20) in 2001 – 2009
- Toyota Previa 2 (XR30) in 2000 – 2005
- Toyota Previa 3 (XR50) in 2006 – 2010
- Toyota RAV4 2 (XA20) in 2003 – 2005
- Toyota RAV4 3 (XA30) in 2005 – 2012
- Toyota Solara 1 (XV20) in 2001 – 2003
- Toyota Solara 2 (XV30) in 2003 – 2008
Disadvantages of the Aisin AW91-40LS gearbox
- In the early years, there were problems with the transmission control unit, but they were quickly fixed;
- And so, this automatic transmission lasts for up to 400,000-500,000 km with a respectable owner;
- The torque converter lockup clutch is too small and wears out quickly under vigorous driving;
- And if it’s not replaced promptly, it will damage the oil pump bushing and cause leaks;
- And under vigorous driving, the Teflon ring damages the groove in the rear cover;
- Then the oil pressure in the system drops, and the clutch packs begin to burn out.
