Rear Axle Ratio...how do I know what I have? - Ford Truck Enthusiasts Forums



Excursion - King of SUVs 2000 - 2005 Ford Excursion SPONSORED BY:

Rear Axle Ratio...how do I know what I have?

Reply
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 01-01-2010, 11:52 AM
Michael Hopton Michael Hopton is offline
New User
Thread Starter
 
Join Date: Dec 2009
Posts: 15
Michael Hopton is starting off with a positive reputation.
Rear Axle Ratio...how do I know what I have?

My new to me 03 EB Exc 4x2 is equipped with the factory towing package. I'm not towing that much - a 4500lb max weight popup camper. How can I determine what the axle ratio is in the rear end of my truck? Oh, it is a 5.4l v8 - and no, it doesn't win a drag race - but it sure moves quickly enough for hauling my family around safely!

thanks...
Reply With Quote
  #2  
Old 01-01-2010, 12:12 PM
howler4x4's Avatar
howler4x4 howler4x4 is offline
Senior User
 
Join Date: Jan 2009
Location: LI, NY
Posts: 483
howler4x4 is gaining momentum as a positive member of FTE.howler4x4 is gaining momentum as a positive member of FTE.
Post the info from the tag on the diff
or
search here for VIN # decode info

Both of the above assume that the ratio is still matches the tag/VIN. 100% sure method is to count teeth; prolly overkill for your purpose.
Reply With Quote
  #3  
Old 01-01-2010, 12:22 PM
gr8scott72 gr8scott72 is offline
Posting Guru
 
Join Date: Nov 2008
Location: Norco, LA
Posts: 2,305
gr8scott72 has a brilliant futuregr8scott72 has a brilliant futuregr8scott72 has a brilliant futuregr8scott72 has a brilliant futuregr8scott72 has a brilliant futuregr8scott72 has a brilliant futuregr8scott72 has a brilliant futuregr8scott72 has a brilliant futuregr8scott72 has a brilliant futuregr8scott72 has a brilliant futuregr8scott72 has a brilliant future
Quote:
Originally Posted by howler4x4 View Post
Post the info from the tag on the diff
or
search here for VIN # decode info

Both of the above assume that the ratio is still matches the tag/VIN. 100% sure method is to count teeth; prolly overkill for your purpose.
Even easier than that:

If it's close to this:


Then you have 4.10:1 gears.
If it's below 2k rpms at 60 mph, then you have the 3.73:1 gears.
Reply With Quote
  #4  
Old 01-01-2010, 06:10 PM
Immortal_Ben's Avatar
Immortal_Ben Immortal_Ben is offline
Mechanic by Necessity
 
Join Date: Nov 2007
Location: Calhan, CO
Posts: 1,880
Immortal_Ben has much to be proud ofImmortal_Ben has much to be proud ofImmortal_Ben has much to be proud ofImmortal_Ben has much to be proud ofImmortal_Ben has much to be proud ofImmortal_Ben has much to be proud ofImmortal_Ben has much to be proud ofImmortal_Ben has much to be proud ofImmortal_Ben has much to be proud of
Yup, I have the 4:10s and that looks about right.
Reply With Quote
  #5  
Old 01-01-2010, 07:14 PM
gr8scott72 gr8scott72 is offline
Posting Guru
 
Join Date: Nov 2008
Location: Norco, LA
Posts: 2,305
gr8scott72 has a brilliant futuregr8scott72 has a brilliant futuregr8scott72 has a brilliant futuregr8scott72 has a brilliant futuregr8scott72 has a brilliant futuregr8scott72 has a brilliant futuregr8scott72 has a brilliant futuregr8scott72 has a brilliant futuregr8scott72 has a brilliant futuregr8scott72 has a brilliant futuregr8scott72 has a brilliant future
Quote:
Originally Posted by Immortal_Ben View Post
Yup, I have the 4:10s and that looks about right.
The picture is from mine and it is the 4.30:1 but the OP has the V8 so it would be the 4.10:1 instead. (or 3.73:1)
Reply With Quote
  #6  
Old 01-01-2010, 08:05 PM
Immortal_Ben's Avatar
Immortal_Ben Immortal_Ben is offline
Mechanic by Necessity
 
Join Date: Nov 2007
Location: Calhan, CO
Posts: 1,880
Immortal_Ben has much to be proud ofImmortal_Ben has much to be proud ofImmortal_Ben has much to be proud ofImmortal_Ben has much to be proud ofImmortal_Ben has much to be proud ofImmortal_Ben has much to be proud ofImmortal_Ben has much to be proud ofImmortal_Ben has much to be proud ofImmortal_Ben has much to be proud of
I said "about"
Reply With Quote
  #7  
Old 01-01-2010, 09:02 PM
UrbanXX's Avatar
UrbanXX UrbanXX is offline
Posting Guru
 
Join Date: Sep 2008
Posts: 2,497
UrbanXX has a superb reputationUrbanXX has a superb reputationUrbanXX has a superb reputationUrbanXX has a superb reputationUrbanXX has a superb reputationUrbanXX has a superb reputationUrbanXX has a superb reputationUrbanXX has a superb reputationUrbanXX has a superb reputationUrbanXX has a superb reputationUrbanXX has a superb reputation
If you want to know your "rear axel" look in the drivers door jam:
You will see an axel code
If your axel code begins with a LETTER you have a posi rear-end
Get the axel code and look up the code for ratio.

Your Excursion being 2WD with a 5.4 engine should have a 4:10 if the axel code starts with a letter then it should have a posi-track rear end, if not a standard 4:10 rear end. Unless it has been changed over the years.
There are exceptions but few.
Reply With Quote
  #8  
Old 01-02-2010, 02:04 PM
Michael Hopton Michael Hopton is offline
New User
Thread Starter
 
Join Date: Dec 2009
Posts: 15
Michael Hopton is starting off with a positive reputation.
My axle code is "31"

At ~60-65mph I'm turning just under 2k rpms - 18-1900 or so.

Don't think anything's been changed - vehicle is all stock. What is better for towing? 3.73, or 4.01? Does it matter too much if my fully loaded pop-up is no more than 4500lbs?

thanks
Reply With Quote
  #9  
Old 01-02-2010, 04:24 PM
UrbanXX's Avatar
UrbanXX UrbanXX is offline
Posting Guru
 
Join Date: Sep 2008
Posts: 2,497
UrbanXX has a superb reputationUrbanXX has a superb reputationUrbanXX has a superb reputationUrbanXX has a superb reputationUrbanXX has a superb reputationUrbanXX has a superb reputationUrbanXX has a superb reputationUrbanXX has a superb reputationUrbanXX has a superb reputationUrbanXX has a superb reputationUrbanXX has a superb reputation
Axel code 31:
3:73 NON Limited Slip.
Reply With Quote
  #10  
Old 01-02-2010, 04:33 PM
Michael Hopton Michael Hopton is offline
New User
Thread Starter
 
Join Date: Dec 2009
Posts: 15
Michael Hopton is starting off with a positive reputation.
Which means...?
Reply With Quote
  #11  
Old 01-02-2010, 04:35 PM
Monsta's Avatar
Monsta Monsta is offline
Post Fiend
 
Join Date: Oct 2001
Location: The Island of Maui
Posts: 18,306
Monsta has a spectacular reputation.Monsta has a spectacular reputation.Monsta has a spectacular reputation.Monsta has a spectacular reputation.Monsta has a spectacular reputation.Monsta has a spectacular reputation.Monsta has a spectacular reputation.Monsta has a spectacular reputation.Monsta has a spectacular reputation.Monsta has a spectacular reputation.Monsta has a spectacular reputation.
You have a 3.73:1 ratio axle and you do not have a limited slip (traction device) installed.

4.10s would be a better match for your truck (IMO) but sounds like things are working out for you as it is now.
Reply With Quote
  #12  
Old 01-02-2010, 04:38 PM
UrbanXX's Avatar
UrbanXX UrbanXX is offline
Posting Guru
 
Join Date: Sep 2008
Posts: 2,497
UrbanXX has a superb reputationUrbanXX has a superb reputationUrbanXX has a superb reputationUrbanXX has a superb reputationUrbanXX has a superb reputationUrbanXX has a superb reputationUrbanXX has a superb reputationUrbanXX has a superb reputationUrbanXX has a superb reputationUrbanXX has a superb reputationUrbanXX has a superb reputation
It means your Ford Excursion has an axel ratio of 3:73 to 1. It also means that your Ford Excursion does not have a limited slip rear-end.
Reply With Quote
  #13  
Old 01-02-2010, 04:41 PM
gr8scott72 gr8scott72 is offline
Posting Guru
 
Join Date: Nov 2008
Location: Norco, LA
Posts: 2,305
gr8scott72 has a brilliant futuregr8scott72 has a brilliant futuregr8scott72 has a brilliant futuregr8scott72 has a brilliant futuregr8scott72 has a brilliant futuregr8scott72 has a brilliant futuregr8scott72 has a brilliant futuregr8scott72 has a brilliant futuregr8scott72 has a brilliant futuregr8scott72 has a brilliant futuregr8scott72 has a brilliant future
Quote:
Originally Posted by UrbanXX View Post
It means your Ford Excursion has an axel ratio of 3:73 to 1. It also means that your Ford Excursion does not have a limited slip rear-end.
I also means that as long as you are happy with the way it tows, save your $750 and keep driving it the way it is. (Regearing costs about $750 per axle to have a quality shop do it.)
Reply With Quote
  #14  
Old 05-22-2012, 04:17 PM
Nof1 Nof1 is offline
Senior User
 
Join Date: Mar 2012
Location: Troy michigan
Posts: 112
Nof1 is gaining momentum as a positive member of FTE.Nof1 is gaining momentum as a positive member of FTE.
Hi everyone .. I need ur help .. I have 01 v10 x limited with towing package the tag on the inside of my door say axle e ... What size gear does that mean??? Thank you for your
help
Reply With Quote
  #15  
Old 05-22-2012, 07:12 PM
ComputerCowboy's Avatar
ComputerCowboy ComputerCowboy is offline
Posting Guru
 
Join Date: Dec 2011
Posts: 1,015
ComputerCowboy is a splendid one to beholdComputerCowboy is a splendid one to beholdComputerCowboy is a splendid one to beholdComputerCowboy is a splendid one to beholdComputerCowboy is a splendid one to beholdComputerCowboy is a splendid one to beholdComputerCowboy is a splendid one to behold
Quote:
Originally Posted by Nof1 View Post
Hi everyone .. I need ur help .. I have 01 v10 x limited with towing package the tag on the inside of my door say axle e ... What size gear does that mean??? Thank you for your
help
An axle code is supposed to be two characters. Are you sure it only says E?

I called my local dealer with my VIN and they looked up my axle for me.
Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
1955 F-250 Rear axle ratio jaskoskip 1948 - 1956 F1, F100 & Larger F-Series Trucks 6 01-03-2016 06:17 AM
axel ratio njeske Ranger & B-Series 14 05-06-2007 04:57 PM
1995 F150 4X4 rear axle ratio yoda Clutch, Transmission, Differential, Axle & Transfer Case 4 10-14-2003 08:44 PM
Want to understand 411 rear axle ratio DeeBee Expedition & Navigator 10 09-12-2003 10:53 AM
Differential/Gearbox ratios jonniekash 1973 - 1979 F-100 & Larger F-Series Trucks 7 07-15-2001 11:29 PM


Go Back   Ford Truck Enthusiasts Forums >

Tags
05, 373, axel, axle, codes, duty, end, excursion, find, ford, ratio, ration, ratios, rear, rearend, super, truck

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 On
Pingbacks are On
Refbacks are On

Forum Jump


All times are GMT -5. The time now is 07:19 PM.


This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company.