View Full Version : 3.55 or 3.73 rear end

03-03-2006, 12:47 PM
I'm thinking of getting a 2001-2003 F-150. One, to pulling a trailer with all my lawn mowing tools. Two, to plow snow in the winter. I'm not really familiar with rear ends. So should I get a F-150 with a 3.55 or 3.73 rear end. What are going to be my positive and negative aspects. I know i'm going to be getting the 5.4 V8 in it though.

03-03-2006, 01:13 PM
3:73 or maybe even 4:11 it will make alot of difference with pulling and pushing snow!

03-03-2006, 01:14 PM
Just put a 4.10 gear in my Ranger 3.0V6 to give me more pulling power with my trailer.
The lower the gear ratio (higher numerically) the higher the RPM will be from your engine, meaning you will have low end power but at 70mph the engine will reving at a higher RPM, maybe out of it's power range IF you gear it too low.
If I put a 4.56 gear in I could pull a stump out of the ground but my top speed would be around 55mph...so to speak.

I would go with the 3.73 gear or higher numerically if you are pulling a trailer or pushing snow.

I'm sure the Mechanics on this board could explain it better.:waving:

http://www.accuautoparts.com/index.jsp ...browse and go to "calculators" on the right side.

03-03-2006, 01:20 PM
The higher the number the worse gas mileage you'll get, but the more power to push or pull.

General Landscaping
03-03-2006, 01:56 PM
Unless you are doing a LOT of highway driving... get a 4.11 or 3.73.

That 5.4 isn't exactly a powerhouse and will need the help of a "big" axle.

03-03-2006, 02:03 PM
Unless you are doing a LOT of highway driving... get a 4.11 or 3.73.

That 5.4 isn't exactly a powerhouse and will need the help of a "big" axle.

^^^^^ He hit the nail right on the head. The 5.4 is a really weak motor. I should know first hand. We have one in our 2002 Expedition with 3.55 gears and it feels like it wont move out of its own way let alone when I put my car and car trailor behind it. Poor thing struggles like it is on its last leg to pull it.

Here are a couple tips.

1. Make sure you get 3.73 or 4.11 gears
2. Make sure you get a 2003 or newer. From 2002 and back they had a 2 valve design that made less power. From 2003 to present they have a 3 valve head that makes more power.

If you get a 2003 or newer plus 3.73 gears or 4.11's it should do just fine.

Richard Martin
03-03-2006, 05:55 PM
Being a Ford guy from way back this is what I'd do. 4.10s automatic, 3.73s stick unless you do a lot of highway and then I'd get the 3.55s for either.

03-03-2006, 06:06 PM
buy a 3/4 ton or more you wont regret it!!

03-03-2006, 06:25 PM
a F 150 is not a snow plowing Machine, Get a 250 with 373 or 411s.
A 150 is restrictive on the GVWR and cannot have a good plow on it without a lot of front end expense, save in the long run and step up to the right equipment to begin with.
get a 250 or just a side note, the 350 is less than a grand to upgrade to it instead of the 250