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Stock Problems/IssuesDiscussions related to warranty related issues and repairs, or other problems with the OEM parts and software for MINI Cooper (R50), Cabrio (R52), and Cooper S (R53) MINIs.
When the transmission was rebuilt was it run through the gears properly? I had a problem with my CVT and after replacing the fluid and adding a serum from oilextreme.com it worked a lot better but I needed to run through all of the gears. On this site in the DIY section there is a reference on how to go through the gears properly. Not sure if this would help but that's my 2 sense.