Gearbox Mazda SJ6A-EL

The Mazda SJ6A-EL 6-speed automatic transmission has been produced in Japan since 2005 and is installed on the popular MX-5 convertibles and all their varieties such as Miata and Roadster. In fact, this transmission is one of the varieties of the famous Aisin TB61SN automatic transmission.

Mazda gearboxes: F3A, G4A‑EL, GF4A‑EL, F4A‑EL, AW6A‑EL, FW6A‑EL / GW6A‑EL, SJ6A‑EL.

Specifications

Production years since 2005
Type automatic transmission
Number of gears 6
Type of drive rear
Engine volume, l up to 2.0
Torque output, Nm up to 350
Recommended oil Toyota ATF WS
Oil capacity, liter 7.4
Replacing the oil every 60,000 km
Replacing the filter every 60,000 km
Gearbox lifespan, km ~400 000
Weight, kg 85

Gear ratios Mazda SJ6A-EL

Using the example of a Mazda MX-5 2010 with a 2.0 liter engine:

Main 4.100
1st 3.538
2nd 2.060
3rd 1.404
4th 1.000
5th 0.713
6th 0.582
Reverse 3.168

The transmission was installed on:

  • Fiat 124 Spider I (348) in 2015 – 2019;
  • Mazda MX-5 III (NC) in 2005 – 2015; MX-5 IV (ND) since 2015;
  • Mazda RX-8 I (SE) in 2005 – 2012.

Disadvantages of the Mazda SJ6A-EL gearbox

  • This is a strong automatic transmission, designed for much greater torque than in Mazda engines.
  • However, owners of sports models are often prone to overly aggressive driving.
  • Therefore, the gearbox oil quickly becomes contaminated with products from wear of the torque converter clutches.
  • And dirty lubricant significantly reduces the life of the solenoids, so update it more often.
  • If you drive with a heavily worn torque converter clutch, it will break the oil pump bushing.

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