Mobil ATF 3309

MobilMobil ATF linegear and transmission

Fluid for automatic transmissions with slip-controlled lock-up clutches, for JWS 3309 duties; meets Ford WSS-M2C924-A.

Classification
Product line Mobil ATF 13 oils
Intended use gear and transmission
Approvals
Meets the requirements of What an approval means
Other designations JWS 3309
Typical properties
Viscosity at 40 °C 33 mm²/s
Viscosity at 100 °C 7.1 mm²/s
Viscosity index 181
Pour point <-45 °C
Flash point >185 °C
Density 852 kg/m³

The car maker has not officially approved the entries in the “Meets the requirements of” row.

Description

Mobil ATF 3309 is a fluid in the Mobil ATF range for automatic transmissions whose torque-converter lock-up clutch operates with controlled slip. Its friction properties prevent clutch shudder.

The fluid holds no official approvals. It meets Ford WSS-M2C924-A; for JWS 3309, GM 9986195, VW G 055 025 A2 and Toyota T-IV applications (topping up in service), ExxonMobil recommends it.

Typical figures: 7.1 mm²/s at 100 °C, 33 mm²/s at 40 °C, viscosity index 181, pour point below -45 °C, Brookfield viscosity at -40 °C 13,000 mPa·s.

Application

Automatic transmissions with a slip-controlled torque-converter lock-up clutch where JWS 3309 or GM 9986195 is required; also topping up where Toyota T-IV or T-III fluids are specified.

Worth knowing

There is little point comparing this fluid with its neighbours in the Mobil ATF range by viscosity: it shares 33 mm²/s at 40 °C with Mobil ATF SHC, yet not a single code. Mobil ATF 134, ATF 134 FE and ATF 200 have MB 236.14, MB 236.15 and MB 236.2 approvals, Mobil ATF 220 and ATF 320 are approved to the ZF, MAN and Voith lists, and ATF SHC has MB 236.8 and MAN approvals. None of these six lists Toyota T-IV, GM 9986195, Ford WSS-M2C924-A or VW G 055 025 A2.

For Mobil ATF 3309 the deciding factor remains the fluid number given in the gearbox documentation. VW G 055 025 A2, for example, is written in the ExxonMobil data sheet as Audi G-055-025-A2, and that is the number of the original Volkswagen fluid, not a quality class; the data sheet itself advises checking the choice against the owner’s manual. The article on universal ATF and long specification lists explains why a branded fluid name such as Toyota T-IV in the list on the can does not by itself make an ATF suitable for just any automatic gearbox.

Data current as of Check the label and the current product data sheet before you buy.

Sources

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