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Open Roads Forum  >  Dinghy Towing

 > Axle ration

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AGKing

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Posted: 02/14/12 12:58pm Link  |  Print  |  Notify Moderator

I am shopping for a used truck to tow a 5th wheel. How do I determine what the axle ratio is?

donn0128

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Posted: 02/14/12 01:09pm Link  |  Print  |  Notify Moderator

Most newer trucks have a build sheet on the glove compartment door. Look for the axle code there.


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Old-Biscuit

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Posted: 02/14/12 01:12pm Link  |  Print  |  Notify Moderator

Look for tag on axle.

Take VIN to dealer and have them run it for data.

Ask the owner.

Jack up rear end......rotate tire 1 revolution and count how many revolutions drive shaft turns.

psa0298

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Posted: 02/14/12 03:00pm Link  |  Print  |  Notify Moderator

Usually you can use the VIN and look it up in the owners manual.

WyoTraveler

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Posted: 02/14/12 06:28pm Link  |  Print  |  Notify Moderator

coded and posted on driver door post. I googled truck type and some of the truck forums came up with the different codes and which axles


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Golden_HVAC

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Posted: 02/14/12 11:38pm Link  |  Print  |  Notify Moderator

Golden_HVAC wrote:

You can find your vehicle assembly plant, engine size, ect with this VIN decoder.

https://www.fleet.ford.com/maintenance/vin_tools/default.asp

I found out mine is a F53 chassis, V8, assembled in Mexico.

Yes I already knew that, but it is a cool website anyway.

I also found a towing guide for 2007 models.

https://www.fleet.ford.com/showroom/rv_trailer_towing/2007/2007_default.asp

You can change model year 2007 to a range from 2002 to present model year.

Fred.


On the work van that I drive, there is a W indicating it is non - limited slip 4.10:1 axle ratio. Exactly what is needed in that E250 van with the smaller 4.6L V8 and really tall overdrive, that limits the engine speed while in overdrive.

So look at the driver's door, and there should be a letter indicating what axle is installed, but no chart to show what axle it is. You have to look that up on the internet or from the dealer.

Fred.

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Posted: 02/15/12 07:28am Link  |  Print  |  Notify Moderator

My 2002 F250 is coded C1 for 3.73 axle and my 2008 F250 is coded 4N which is 4.10 axle with limited slip.

All of the codes are on the internet. The code is located on the left hand door post of the vehicle.

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