I don't use Tow Haul all of the time and the only time I have had any shuddering, is going through a residential area....and it only happens once in a great while and when it does, it only does it for second or two. Much ado about nothing.
I drove a 2014 2500 68rfe at the empty weight of 10K not including driver @ 30K miles with 3:42. T/H caused a lot of dead pedal issues in bumper to pumps traffic, also it would clunk a lot.
To each his own, I know if I buy a new one, which I doubt, it’ll have 4:10’s or a higher ratio, depending on the truck.
I think the G56 only comes with a 3.73 gear ratio?