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
^^^^ With the 10 speed 3.31 gears are available with 20’ wheels in the SRW Ford trucks. Dropping gears on hills is no big deal. In fact it makes sense to be in direct (4th gear with the 6 speed or 7th with the ten speed) when you’re pulling grades. The additional torque of the newer engines coupled with the lower 1st gear ratio of the 10 speed transmissions make 3.31 gears an excellent choice for lighter trailers. ( by lighter I mean under 20,000 lbs). Once you go dually with the Ford, 3.55 becomes the highest ratio offered.
