Here’s my 2 cents. 5th gen, 5.7l, 3.92 rear gear. Towed my 6500# travel trailer coast to coast twice and Maine to Florida. Always tow in t/h mode. If you look at the 7th and 8th gear ratios they are both overdrives. When in t/h mode 8th gear is blocked out, which is good so you don’t “lug” the...