Ah, I see what you're after now. I leave mine in gear and back out of the throttle to let it shift, which is how the manuals (shop and owners) describes to operate it.
One of the nice things about having it setup the way the factory did it is that you really can't engage it under 30 mph, or at least not for very long. Not only will the governor will not allow it to engage until 28 mph, but will also disengage it at 25 mph. If everything is present and in working order within the transmission, it should not be able to be engaged in overdrive in reverse, but I suppose if the reverse lockout rod was missing/broken/bent, one could do that and damage things.
