Question 309bobby

[309bobby]

Hi, i'm considering buying a new ford f-350 diesel truck to pull my 14k fifth wheel.
The truck is a great buy but has a 355 rear end

anyone know what will be effect on towing vs a 373 rear end. power,mileage,performane, hills etc??

thanks:

 

[BJS]

3.55 rears will give you a bit longer legs and can hurt towing power over the 3.73. What year trucks are you looking at, brand new or older?

Oh and welcome to the site.

 

[309bobby]

Thanks Brandon, 2009 new with 6.4.
nothing worse than being slow on hills after spending a ton of money 373 or 410 sounds best for my application.

 

[DaveBen]

3.73 gears are good gears. How often do you pull the trailer?

Dave

 

[309bobby]

Thanks Dave,

Retired, Illinois to Rio Grande Valley, monthly shoer hauls maybe a rally of 600 or more miles. 6,000 to 7,000 miles a year.

 

[02SilverStroke]

The 3.73 gears would be better than 3.55. Ford added the 3.55 gears to increase the fuel economy. When I had my PSD, I would have preferred the 3.55 because I rarely towed anything. However since you're going to be doing alot of towing, you'll be better off with at least the 3.73.