Ford super duty 3.31 rear end. Will it be a big mistake. ?
Pulling a 37 foot Cedar creek with a f350. Diesel. Would the 3.31 rear end work or should I get the 3.55?
Forum Discussion
Of course the 3.55 will do better, all other things being equal. When doing your homework, check that the tire sizes are the same, earlier 6.7s used the 3.55 gears with the 20" wheels and the 3.31 with the 18" wheels, both had the same engine speed. There were a few exceptions such as snow plow preparation.
