dryfly wrote:
It appears I'm getting excessive slippage or "shear" in the TC. Adding additional cooling or manually shifting seems to me like putting a band-aid on the problem. I can only see these solutions in extreme situations when you have a transmission/TC set up to optimum and you are looking for the last ounce of performance, not as an initial solution.
If you want the torque converter to stay locked you will have to be making enough power to keep it locked, otherwise there are only two alternatives, the converter unlocks or you shift down to a gear where the converter can stay locked and maintain your speed.