I've found much the same towing out approx. 1.5 tonne van, the Deafener pulls it easy and makes getting past slower vehicles in passing lanes very easy.
Same up hills whereas in our 3ltr Prado we only got more noise when kicking down a gear, the Deafener will pull very well.
Better gear ratios and good torque show LR have obviously done their homework.
AlanH.

