Patches
Veteran Member
Nissan does what most truck makers are doing with 5 and 6 speed autos. The put in tall gears in the diff, like 3.36 in the Nissan. They put lower gears in the Tranny 1st gear and claim this is equiv to a 4:10. Obviously the manufactures have done their homework but this does put more torque onto the U-joints. The key is, how comfortable the run was. IE if it pulled well but you were white knuckled, then probably too much towed load. If you arrived relaxed and still smiling, then probably is a good fit for your trucks capacities.
Toyota doesn't cheat on the gearing; their 5.7 towing package comes with 4:30 differential gearing, 1:1 4th gear, and two overdrives. I can't imagine a better towing half-ton and I get what I consider good mileage empty