[tdangle]

The way mine is set up the vac switch is hooked to manifold vacuum. When I go into a cruise condition in 4th the converter Locks after 10 sec. I set the vac switch at about 8" of vac. So it only unlocks when vac drops below 8". slight grads it stays locked, but heavy pulling will drop it below 8" of vac and unlock. My only issue is I have a 2004r and it shifts way too early in light throttle driving, so I mostly drive around town in D as even with 4.10 gearing 30 in OD lugs the engine more than I like.