mossline 15 Report post Posted March 8, 2012 Has anyone done a transmission flush on their 540i auto box before? Seems like there are plenty of write ups and DIY's out there. Just wondered how easy others here had found it? Quote Share this post Link to post Share on other sites
*Glenn* 854 Report post Posted March 8, 2012 Its best to drain oil, change filter, clean & refit pan with new gasket. Replace wiring loom socket in the housing as well if there are signs of leaking then refill correctly with the appropriate oil. There are 2 different oils that are used dependant on the type of gearbox. Quote Share this post Link to post Share on other sites
