3.73 or 3.55 Rear End Ratio

[Superduty123]

I am thinking of ordering a 2011. Right now I have an 07 with the 3.73 Limited Slip RR

I will be both either towing a 5th wheel at times or carrying a camper. Can I get a 3.73 or had Ford changed it to the 3.55

Does anyone here have the 3.55 and doing any heavy towing?

[jstange2]

I have 3.31s and tow about 40% of the miles usually around 4000 to 7000 pounds. I think the 6 speed makes a huge difference for us guys with the higher diff gears.

[jimchris]

My 3:31's in the Ford will out pull my 3:73's in the Dodge with a chipped 5.9. Go with the 3:31's, I tow about 25% of the time and when I do tow I'm 25K plus and it handles it very well.

[jstange2]

Originally Posted by jimchris

My 3:11's in the Ford will out pull my 3:73's in the Dodge with a chipped 5.9. Go with the 3:11's, I tow about 25% of the time and when I do tow I'm 25K plus and it handles it very well.

Do you mean 3.31s or am i missing something?

[jimchris]

Originally Posted by jstange2

Do you mean 3.31s or am i missing something?

Yea, 3:31's

[jstange2]

I pulled my 8000 lb (i know)camper and got 12 mpg. Absolutely no lack of power either.

[DieselHamster]

I also have 3.31s on my longbox crew cab, and while towing a 4000 lb dry / 7500 lb gross trailer it is quite happy in 6th gear. I have to say that surprised me given that my 7.3 does strain somewhat while towing that trailer.