Hello Everyone,

I have some bad troubles with my 2011' Cooper S 6 speed automatic transmission since i have flushed it.
When cold it works quite properly, but once hot the transmission slips, has issue to pass the speed, is really brutal, make some buzzing sounds, and after several minutes the car can display a message and reduce it power.

I respected what it is said in the repair manual and the tips I found on this forum, especially about having the transmission fluid temperature between 35 and 45 degrees with motor on while filling it.

I used Vaico ATF spezial, contained in a pack, with filter, screws...

I think i should make a second flush, maybe with another fluid? The car have 105.000km and didn't have any flush before.

What do you think?

Thank you very much.