Here is an alternate solution to the factory JWS-3309 ATF fluid for the AISIN GA6F21WA 6-speed Automatic Transmission used in both Gen 1 Cooper S and Gen 2 Cooper and Cooper S models.
For the following models equipped with the 6-speed Automatic:
2005-2006 R50 MINI Cooper S Hatchback
2005-2008 R52 MINI Cooper S Convertible
2007-2013 R56 MINI Cooper and Cooper S Hatchback
2008-2014 R55 MINI Cooper and Cooper S Clubman
2009-2015 R57 MINI Cooper and Cooper S Convertible
2012-2015 R58 MINI Cooper and Cooper S Coupe
2012-2015 R59 MINI Cooper and Cooper S Roadster
D4 ATF is a fully-synthetic product designed with superior low-temperature properties compared to a Dexron III® fluid, and the improved shear-stability requirements which is part of the Mercon V® specifications.
D4 ATF also provides a GL-4 level of gear protection, making it a superior product for transmissions and transaxles. The balanced frictional characteristics provides smooth and consistent shifts for extended drain intervals. The superior stability compared to petroleum ATFs allows high-temperature operation without varnishing valves and clutches which leads to transmission failure.
Suitable replacement for JWS 3309.
Vis @ 100°C, cSt: 7.5
Vis @ 40°C, cSt: 34
Pour Point, °C: -60
Pour Point, °F: -76
Flash Point, °C: 225
Flash Point, °F: 437
Brookfield Vis @ -40°C, P: 52
The MINI 6-speed Automatic fluid capacity is 6.0 liter or 6.3 quarts. When replacing oil sump, the capacity is 4.5 liter or 4.8 quarts.
NOTE: This fluid is not compatible with the CVT automatic transmission. For the CVT automatic transmission, see NMG7298.