Greg its starting to make sense.

I was looking at some data from when the diff was 3 weekends old(first time with data logger) and noticed going through a chicane hopping curbs the data was showing a small jump in RPM.

Plus the weekend when the axle broke, I actually set my fastest lap time at the track so it would seem a little odd if my fastest lap time was with an almost open diff.

I guess I was just assuming it would provide enough bias to drive.

by re-springing the clutch packs do you mean installing clutch packs that are thicker?