Hi Steve. This subject has been the subject of many (and lengthy) posts over the past 6 or so months on this Forum.

Some are very disappointed that the rear of the Mux sags even when the 'van is within Isuzus tow limits and other owners say they haven't had a problem - so go figure lol

I suggest you the search feature at the top of the page and dig out these previous posts - you will have to try various combinations of words to be successful in the search though - maybe "Mux" "Isuzu Mux" "Towing with a Mux" - but you should bring up at least 3 long posts about the subject