Thread Tools Display Modes
Old 09-13-2010, 03:36 PM   #1
Junior Member
Join Date: Sep 2010
Posts: 2
Engine/Axle Ratio Combinations

I'm looking at purchasing a 2010 Ford F100 as a TV. The two I'm considering have different engine and axle ratios. One is a 5.4L with a 3.31 ratio (7,700# rating). The other is a 4.6L with a 3.73 ratio (8,200# rating).

Both options are more than adequate for my needs but does anyone out there have a preference? My towing trips will be mostly weekends here and there so I will be using the truck for non-towing purposes the majority of the time.

sjp_42 is offline   Reply With Quote
Old 09-13-2010, 06:43 PM   #2
Join Date: Aug 2009
Location: Ottawa Valley, Ontario
Posts: 181
3.31 is not much of a towing gear. You'll get better towing with a 3.73 but you give up MPG. What is your loaded trailer weight & loaded truck weight? These numbers will go a long way to help some of the experts help you. Without this info my preference would be the 5.4 with 3.31 gear as long as your towing doesn't consist of mountains on a regular basis. That leaves you with a powerful truck with great gas mileage. Also, do these trucks have the tow package? This link might help too.

Arn is offline   Reply With Quote
Old 09-13-2010, 07:13 PM   #3
Junior Member
Join Date: Sep 2010
Posts: 2
Sorry, I mis-typed. Meant F-150. TT dry weight of 4500# and a maximum loaded weight of probably 5700-5800#. Both trucks have towing packages (transmission oil cooler, upgraded radiator & alternator).

Initial use will be Wisconsin and Michigan so some hills but no mountains.
sjp_42 is offline   Reply With Quote
Old 09-13-2010, 08:30 PM   #4
Join Date: Aug 2009
Location: Ottawa Valley, Ontario
Posts: 181
6 of one, half a dozen of the other. You're right, both are more than adequate.
Arn is offline   Reply With Quote
Old 09-13-2010, 08:46 PM   #5
Join Date: Aug 2010
Posts: 796
From what you have stated above, I am guessing you are looking at a LWB Reg Cab 4X4?

If I were you and were planning ahead on towing while you are in the buying mindset, I would opt for the 3.55 rear with the 5.4L which would put you at an amazing 9500# WITHOUT having to pop for the max payload OR Max trailer packages which would give you a healthy safety margin on your tow weights AND it would still be a reasonable gear for your everyday highway driving.
Or go with the 4.6L 3.55 and go with some drop off...

Good luck in whatever you choose!

Drive Safe, Drive Ford!

I have an 09 Screw W/ 4.6L 3V and 3.55 rear and it is good for 9500# according to the Ford man....Hope I never even sniff that tho....
RhoZeta is offline   Reply With Quote
Old 09-13-2010, 08:58 PM   #6
Senior Member
powerboatr's Avatar
Join Date: Aug 2006
Location: homebase Quitman Texas at Lake Fork
Posts: 1,388
I have a 2010 f150 with a 3.55 rear end i think we are rated at 8500lbs
with 20" wheels,
my only complaint is i am used to my 350 deisel and it had gobs and gobs of torque
this gas burner is not what i would consider to be a barn burner in the torque arena. it downshifts from 6th quite often in hilly terrain, like over passes

i wouldn't go any higher in a ration
3.13 i beleive is one below as is a 3.08

355 or 373 is best for towing.
if your going to be close to your capacity i would opt for a 3.73 if available

remember the 2011 will get a new gas engine 6.2 litre and quite a few more HP and the tranny will have a selector to allow you to choose a gear and stay in it like 5th for towing etc, right now you can select 3rd and it stays there,
but being able to take on 5th as you wish will be great for towing

the 5.4 is a dead horse, it will be phased out by end of next years run possibly for the 150, the new 5.0 should be online by then for the trucks, keep in mind the NEW 5.0 is a new engine not related to the 5.0 of the past years except in displacement
Living in the Piney Woods of Texas.
powerboatr is offline   Reply With Quote
Old 09-14-2010, 07:29 AM   #7
archham's Avatar
Join Date: Jul 2009
Location: High Point NC
Posts: 96
I have a 2009 SCREW with the 5.4 and 3.31s pulling about a 4k camper. It does GREAT. I can go just as fast as I want, subject to the tire rating of course. About the only thing I will not do with it is pass a slower vehicle on a 2 lane road (unless it is downhill ) I get about 11MPG towing and roughly 16 non-towing (half city / half highway).

If I get another camper that is over 6k I might re-gear to 3.73 - but otherwise it is fine. I think you would be ok with 3.73s, but what if you decide to upgrade to a bigger camper?

I have heard that the 3.73 might get a bit better mileage in city driving than the 3.31 as the trans can get to overdrive easier. Not sure on that though.
2012 Puma 30FQSS
2005 Ford F-250 Super Crew 6.0 PSD
2003 Honda Odyssey
1 wife, 1 son, & 1 cat
Volunteer Firefighter/EMT
Asst. Scoutmaster (BSA)
archham is offline   Reply With Quote
Old 09-21-2010, 09:41 AM   #8
Site Team
acadianbob's Avatar
Join Date: Mar 2008
Location: St. Paul, Minnesota
Posts: 2,985
We have 3.73s and can often tow our 5,000 pound trailer in overdrive. I would think that the 3.31s would work fine but it is more likely that you would have to lock out overdrive.

On another (off topic) note, I wonder about the new 5.0 in the F150. Horsepower and torque appear to be up from the 5.4. BUT, I notice that the torque peak is 4,250 RPM; considerably higher than the 5.4. Not exactly the sweet spot for towing. We tow mostly around 2,000 to 2,500 RPM. I wonder what the 5.0 torque is at these speeds versus the 5.4. I guess the question is this; will the 5.0 really tow better than the 5.4? I've always been a Ford proponent because of engine torque characteristics. This seems like it is going in the wrong direction to me. Thoughts?

Don't bother with brand bashing. I'm looking for honest discussion here.

2018 F250 Lariat 6.2 4X4 w 4.30s, 2018 Wildcat 29RLX
2003 Yamaha FJR1300, Demco Premiere Slider
1969 John Deere 1020, 1940 Ford 9N, 1948 Ford 8N
Jonsered 535, Can of WD-40, Duct Tape
Red Green coffee mugs
acadianbob is offline   Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

» Featured Campgrounds

Reviews provided by is not in any way associated with Forest River, Inc. or its associated RV manufacturing divisions.

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 03:09 PM.