By the way, A/T's do not have the same immediacy of engine brake as a manual because it courses through a torque converter. In the situation of an A/T, talagang mas madalas gamitin ang preno dahil hindi naman kasing effective ang engine break even if you shift to 2 or low. There is a noticeable lag before the gear engages and this may not be quick enough for the situation at hand.