Good Sam Club Open Roads Forum: Travel Trailers: FORD F-150 AXLE RATIO CHOICE
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 > FORD F-150 AXLE RATIO CHOICE

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Bellavance

Longueuil, QC

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Posted: 09/17/20 06:19am Link  |  Quote  |  Print  |  Notify Moderator

My new trailer (Keystone 26RBS) weighs only 6600 lbs + cargo.
I’m about to order a 2021 Ford F-150 equipped as follows:
V6 3.5 engine
Standard (not Max) Trailer Towing Package.
This truck has a 10-speed auto transmission, and can tow 10,500 lbs and the same 16,200 lbs GCWR with EITHER the 3.31 or 3.55 AXLE RATIO, according to Ford.
I was thinking about ordering the 3.31 axle ratio for fuel economy on flat highways, and pulling the trailer in 9th or 8th gear if necessary, which would raise the axle ratio as needed.
Can anyone help with this decision?
Thanks.
Pierre

APT

SE Michigan

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Posted: 09/17/20 07:05am Link  |  Quote  |  Print  |  Notify Moderator

Only 6600 pounds dry will be 7200-8000 pounds loaded. Combine that with pulling two sheets of plywood through the air at 65-70mph.

That is a 7% difference in gearing. You'll never notice a measurable difference in fuel consumption. You will feel a 7% difference in wheel torque. I recommend 3.55 (or whatever the highest numerical axle availible).


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Ivylog

Blairsville, GA and WPB, FL.

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Posted: 09/17/20 07:29am Link  |  Quote  |  Print  |  Notify Moderator

What % of the time will you pull...5%??? Get the 3.31 and pull in 8th if necessary. The days of a 3 speed and 4.11 are long gone.


This post is my opinion (free advice). It is not intended to influence anyone's judgment nor do I advocate anyone do what I propose.

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prichardson

Lafayette, La

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Posted: 09/17/20 07:30am Link  |  Quote  |  Print  |  Notify Moderator

I do not know what the difference is between Ford's standard and max tow package; but my choice would be max tow with 3:55, especially with that engine.

mbopp

Henrietta, NY, USA

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Posted: 09/17/20 07:48am Link  |  Quote  |  Print  |  Notify Moderator

prichardson wrote:

I do not know what the difference is between Ford's standard and max tow package; but my choice would be max tow with 3:55, especially with that engine.

I had a F150 with the standard tow package - get the max tow package.


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Lwiddis

near Jawbone Canyon, CA

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Posted: 09/17/20 08:12am Link  |  Quote  |  Print  |  Notify Moderator

Eight thousand pounds plus......3.55. Not towing...let the transmission shift down for fuel economy.


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ppine

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Posted: 09/17/20 08:13am Link  |  Quote  |  Print  |  Notify Moderator

If you are going to tow over 8,000 pounds get the 3:55.
The 3:73 would be even better.
You are asking a lot from a small engine and a trailer that weighs a lot more than your truck.
I would suggest an F-250 or 350 for that weight and up.

* This post was edited 09/17/20 11:11am by ppine *

goducks10

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Posted: 09/17/20 09:03am Link  |  Quote  |  Print  |  Notify Moderator

https://www.rvusa.com/rv-guide/2020-keys........n-travel-trailer-floorplan-26rbs-tr42323

1st off you'll need the Max Trailer Package (53C comes with a 36 gal gas tank) you'll need that cause your mpg's will drop to the 9 mpg range, 2nd dry brochure tongue weight is 880 lbs. Add all the stuff that goes in front of the axles and you'll be pushing 1000 lbs or more for tongue weight.
You'll need a high payload rating in the 1800-2000 lb range if you pack stuff in the truck and are taking passengers. The higher the payload rating the more stable the truck will be.

Your TT will more than likely be around 7600 lbs loaded and at 30' long it will be a load for you 1/2 ton truck.

I would opt for the 3.55 at a minimum and if I could I'd go 3.73.

Not to go weight police but IMO a 3/4 ton gas would be much easier.
won't get the empty mpg's but the tow experience will be much more relaxed.

MFL

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Posted: 09/17/20 09:26am Link  |  Quote  |  Print  |  Notify Moderator

prichardson wrote:

I do not know what the difference is between Ford's standard and max tow package; but my choice would be max tow with 3:55, especially with that engine.


Agree...Max tow with 3.55.

Jerry





Jebby14

Windsor Ontario

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Posted: 09/17/20 10:09am Link  |  Quote  |  Print  |  Notify Moderator

max tow and 3.55. pay attention to payload you will need it to be around 2000 lbs. trailer that large id be going 3/4 ton.


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