AgroXR6T

I have a BF MK1. Yesterday my gearbox started doing some weird stuff. The gears shift ok if your driving slowly but if you put you foot down that little bit extra to overtake etc. the box doesnt change gears, It just keeps winding out past 5000 if you let it. This happens in normal and performance mode in 2nd and 3rd gear. If you switch to tiptronic and manually change it does this without a problem. Any suggestions?

Hi Im interested in a high flow cat as well as a 4' dump pipe if possible.