I was once a "non-believer" in the 3:42 gears for towing, but the lower powered(370hp/800tq) 68RFE tows as well as my 2012 3500 Max tow with 4:10s could have done. If your buying a Aisin, I think they get the high torque motor. You shouldn't have a bit of trouble towing with 3:72 . 4:10's would be for EXTREME towing IMHO with that set up. When not towing, your truck becomes a freeway king and fuel miser with the 3:42's.