Several folks have made the point that they turned off Traction Control and shazam! All the misbehavior attributed to the ZF9 disappeared. I decided to attempt to duplicate the results in controlled circumstances.
Here's what I observed:
1 - Car seemed to leap off the starting line
2 - No problems downshifting around corners, almost too aggressive
3 - No problems downshifting several gears at slow to moderate speeds (e.g., punching it at 35 mph or so)
4 - SHAWD torque vectoring seemed even more aggressive.
Turning off traction control turned the car into a beast. I could see how on a wet road you could really get in trouble, even with the grip of the Michelin Pilot Sports. ;-)
So I would be curious to see the results of others CAREFULLY duplicating the same experiments. It certainly does seem that it is the traction control programming, NOT the ZF, that causes the unpleasant quirks people report around downshifting. That means it is an eminently correctable problem, and could even be tuned as part of IDS.
Here's what I observed:
1 - Car seemed to leap off the starting line
2 - No problems downshifting around corners, almost too aggressive
3 - No problems downshifting several gears at slow to moderate speeds (e.g., punching it at 35 mph or so)
4 - SHAWD torque vectoring seemed even more aggressive.
Turning off traction control turned the car into a beast. I could see how on a wet road you could really get in trouble, even with the grip of the Michelin Pilot Sports. ;-)
So I would be curious to see the results of others CAREFULLY duplicating the same experiments. It certainly does seem that it is the traction control programming, NOT the ZF, that causes the unpleasant quirks people report around downshifting. That means it is an eminently correctable problem, and could even be tuned as part of IDS.