Gearbox Aisin TB-61SN

The Aisin TB-61SN 6-speed automatic transmission has been produced by the company since 2003 and is installed on many rear-wheel drive Toyota models under the symbol A761E and A761H. This transmission is also installed on Hyundai sedans like the B600 or on Mazda coupes and roadsters like the SJ6A-EL.

TB-60 family: TB‑60SN, TB‑61SN, TB‑65SN, TB‑68LS.

Specifications

Production years	since 2003
Type	automatic transmission
Number of gears	6
Type of drive	all wheel / rear
Engine volume, l	up to 5.0
Torque output, Nm	up to 480
Recommended oil	Toyota ATF WS
Oil capacity, liter	10.8
Partial replacement, liter	4.0
Maintenance	every 60 000 km
Gearbox lifespan, km	~400 000
Weight, kg	109

Gear ratios Aisin TB-61SN

Using the example of a Lexus LS430 2005 with a 4.3 liter engine:

Main	3.615
1st	3.296
2nd	1.958
3rd	1.348
4th	1.000
5th	0.725
6th	0.582
Reverse	2.951

Using

The transmission was installed on:

• Fiat 124 Spider I (348) in 2015 – 2019;
• Hyundai Genesis 1 (BH) in 2008 – 2013;
• Hyundai Equus 2 (VI) in 2009 – 2011;
• Lexus GS430 3 (S190) in 2005 – 2007;
• Lexus LS430 3 (XF30) in 2003 – 2006;
• Lexus SC430 2 (Z40) in 2005 – 2010;
• Mazda MX-5 III (NC) in 2005 – 2015; MX-5 IV (ND) since 2015;
• Mazda RX-8 I (SE) in 2005 – 2012;
• Toyota Celsior 3 (XF30) in 2003 – 2006;
• Toyota Century 2 (G50) in 2005 – 2016;
• Toyota Crown Majesta 4 (S180) in 2003 – 2009; Crown Majesta 5 (S200) in 2009 – 2013.

Disadvantages of the TB-61SN gearbox

• This is a fairly strong automatic transmission, but its service life greatly depends on the operating mode;
• With an active owner, the oil quickly becomes contaminated with wear products of the torque converter clutch;
• Then the dirty lubricant corrodes the channels in the valve body and damages the solenoids;
• Long-term operation with a worn torque converter clutch destroys the oil pump bushing;
• And this in turn leads to oil leaks, which is extremely dangerous for the gearbox.