Forum Discussion

RedRaider44's avatar
RedRaider44
Explorer
Feb 13, 2015

Ford F-150 Ecoboost 3:55 vs. 3:73

Looking for a used (2012-2014) Ford F-150 ecoboost to pull my 27 ft Jayco 27BH, and am only finding ones with the 3:31 or 3:55 rear end. Would love to find one with a max payload package (3:73 rear end), but they are few and far between.
I want to pull my TT without downshifting at every overpass and be able to relax and enjoy my pull....will the ecoboost with the 3:55 rear end be up to the task, or will I need to look for a 3:73 f-150. My TT weighs approx. 5000 lbs dry.
Tow Vehicles
  • Tystevens's avatar
    Tystevens
    Explorer
    Feb 14, 2015
    I am thrilled with how well my EB w/ 3.55 pulls my travel trailer, which sounds like the same size as yours. It tows at 65 in 6th gear comfortably, up small inclines, and so on. I have a GM 5.3, so I know all about downshifting on an overpass, and the EB is leaps and bounds ahead as far as that goes.

    The max payload is hard to find. Max trailer is easier (also 3.73 gears, I believe), and would be nice to have.

    That said, I probably get slightly better mpg unloaded with the 3.55's as well -- I'm averaging 21 on the freeway. But let's also be realistic -- the mathematical difference between 3.55 and 3.73 is slight, so the advantages either way are going to be minor.

About Travel Trailer Group

44,025 PostsLatest Activity: Feb 22, 2025