[Christ]

I should also note that I pointed out another fact to someone else in another thread regarding this:

When you're driving normally, without a TCC lockup switch engaged, you're normally locking and unlocking the TCC MORE and under heavier loads than when you can control it.

In many cases, every time you let off the accelerator too far, it unlocks the TCC, anticipating a brake application. Next, you hit the gas again, with high load at 70 MPH, and it must now decrease the engine speed under high load/tension, to match the speed of the output side of the torque converter.