Hi,
I have a Sorento 04 with the 5 speed auto box. I much prefer it to a manual box, as it makes it so much easier in haevy traffic and when moving the van. I tow 1400kg and the box is rarely caught out. I have towed in France over the Massif Centrale in hot weather and the Sorento's cooling systems kept the needle dead steady. In a fit of enthusiasm I undertook a 4wd club day out on the Salisbury Plain Training areas and Wiltshire byeways. Over 75 miles in all the auto and diesel combination were well matched and relaxed. The penalty is a slight increase in fuel consumption and I get 22-24 towing and 28-31 solo.
Cheers
Other Clive