Every time I let off the gas when I'm driving the converter clutch releases. The problem that I'm having is that when DFCO activates, the engine slows down enough to hit the DFCO RPM disable point because the converter unlocks. This disables DFCO at anything under about 40mph or so, which makes it essentially useless around town unless I'm getting off the freeway. I'd like to keep the converter locked at 0% throttle in 4th gear any time I'm over something like 20-25mph or something close to that. Any way to do this?