I am seeing an issue with a slightly slow shift on the street on the 3-4 shift and a no shift at times at the track. Can anyone point me in the direction on how to maybe apply more clutch pressure or increase firmness to help with what I think might be a glazed clutch pack?
If you datalog the 3-4 shift take a look at the TCC status. I'm seeing "slipped" instead of "applied" at the 3-4 shifts when at WOT but "Applied" at the 1-2 and 2-3. I'm not sure if this has anything to do with your situation but I basically have the same question as you since the 3-4 shift seems to be the weakest in these transmissions.