The TC lock/unlock is extremely annoying on my '98, especially on the highway where you might crest a hill and let off the gas a little too much, causing the TC to unlock. Then you have to wait the 5sec for it to lock again. I find it extremely annoying. Small vac leaks might be amplifying the issue, though I believe I have largely resolved those. I don't recall if the '00 I had years ago did it as much. But 98 was the first year of the electronic control for the trans, so I figure there were probably some updates/tweaking of the programing in the years since. Anyway... I have a ScangaugeII so I can monitor the TPS on the fly. Idle is "17" and I've noticed TC unlocks at "19". WOT is around "91", so around 3% throttle the TC will unlock. Not much, but I seem to hit it quite often. That got me thinking... What if I measure the resistance difference from idle and the tc unlock point, then wire up a switch with a resistor (the same value as the difference in resistance) inline on the TPS wiring to flick on while on the highway. That way it would never go under the TC unlock threshold, keeping it locked. Would that 3% variance from the actual throttle position really cause much issue to the ECU?