Axels - Ranger-Forums - The Ultimate Ford Ranger Resource


Drivetrain Tech General discussion of drivetrain for the Ford Ranger.

Reply
 
LinkBack Thread Tools Search this Thread
  #1  
Old 04-19-2005
Member
Thread Starter
 
Join Date: Nov 2004
Location:
Posts: 3,115
Axels

When we were at centrailia Jeff and I were discussing ranger axel sizes. From my understanding V6 rangers have a 8.8 inch axel. While 4 bangers have the 7.5 inch axel. It dawned on me later is there a difference in axel spline or size between an fx4 level 2 and a none FX4. If so what is the difference ? Maybe I should just ask the question how do I know what axel, and splines, I have ?

Jeff what is your screen name anyway ?
Reply With Quote
  #2  
Old 04-19-2005
Member
 
Join Date: May 2004
Location: Fuquay Varina, NC
Posts: 3,048
im pretty sure all the 4 cyls come with the 7.5 axle. low end 6 cyls also have the 7.5 as well, high end 4.0 and 4x4s have the 8.8 the 8.8 has 28 spline axles i think, while the FX4 axle with the torsen diff has 31 splines. if im wrong its because i have ford 9 inch numbers rolling around in my head.

to see what you have, clean off the tag hanging off the diff cover, and tell us what it says. on yours it should say somewhere 88 4L10 for 8.8 4.10 LS
Reply With Quote
  #3  
Old 04-19-2005
n3elz's Avatar
RF Veteran
 
Join Date: Jun 2004
Location: Kennett Square, PA
Posts: 10,620
Some 6 cylinders (3.0's) have 7.5 axles too, particularly the standard cabs, but some extended cabs got them also.

Yes, the FX4 Level II has 31 spline axle shafts which are thicker than the shafts on the 28 spline models and about 30% stronger. Also, the 28 spline axle tube is 2.75" in diameter, while the 31 spline axle tube is 3.25" in diameter. Another difference is the axle bearings: 28 spline use 2.25" diameter bearings, 31 spline use 2.5" diameter bearings.

Both 28 and 31 spline axles use compatible ring and pinion systems. The carriers are the same also I THINK, but the splining and size of the gears that go on the end of the axle is different. Could be the 31 spline carriers are different -- don't know.

From 2003 on, the FX4 that is NOT the level II has the 28 spline rear.

7.5 and both 8.8 axles have compatible braking systems. There are two drum sizes used in Rangers. Most later ones and most 4x4's have 10" rear drums but earlier Rangers and some 4x2 Rangers have only 9" rear drums. I'm uncertain of the cut off years, or how Ford decided who got what.
Reply With Quote
  #4  
Old 04-19-2005
Member
 
Join Date: May 2004
Location: Fuquay Varina, NC
Posts: 3,048
john im pretty sure that the carriers would have to be different for the different spline axles. the ring and pinion should be the same however.
Reply With Quote
  #5  
Old 04-19-2005
n3elz's Avatar
RF Veteran
 
Join Date: Jun 2004
Location: Kennett Square, PA
Posts: 10,620
No, they wouldn't have to be different. They just need a big enough hole in each end for either axle, and appropriate bearings. But they probably are different -- I just don't know.
Reply With Quote
  #6  
Old 04-19-2005
Member
 
Join Date: May 2004
Location: Fuquay Varina, NC
Posts: 3,048
yeah i guess its possible if the 28 spline axles were longer, and the 31s shorter, than the carrier could be the same, but, the 28 spline axle would have to be as no thicker than the thinnest point of the 31 spline, in the splines, if you know what i mean. also, you would only be using half of the available space in the carrier to hold the axles, which would be silly as far as a strength standpoint.

but like you said, i dont know either, just rationalizing
Reply With Quote
  #7  
Old 04-19-2005
92 Ranger's Avatar
Member
 
Join Date: Aug 2004
Location: Raleigh NC
Posts: 1,229
damn Mr. Griggs knows his stuff.....
Reply With Quote
  #8  
Old 04-19-2005
V8 Level II's Avatar
RF Veteran
iTrader: (4)
 
Join Date: Nov 2004
Location: Michigan
Posts: 7,833
Some general info about late model Ranger axles:

All 4x4s have 8.8.
All 4.0L have 8.8.
All Trailheads have 8.8.
Beginning sometime in the 2002MY, all Edges have been equipped with 8.8, regardless of engine size or drive.

2WD XL, XLT 2.3L have the 7.5
2WD XL, XLT 3.0L, regular cab or supercab, have the 7.5.

All have 28-spline axle shafts except the 2002 FX4 and the 2003+ FX4 LII. These have a unique axle assembly with larger tubes, larger bearings, larger 31-spline axle shafts and a Torsen differential.

The Torsen is a gear type limited slip differential available in the LII-type Rangers only. Most other V6 Rangers have Ford's Traction Lok limited slip available as an option. The 2003+ FX4 Off Road has Traction Lok standard.
Reply With Quote
  #9  
Old 04-19-2005
n3elz's Avatar
RF Veteran
 
Join Date: Jun 2004
Location: Kennett Square, PA
Posts: 10,620
Beauty! Good info.

And I posted on those FX4 bearing sizes. Those larger (2.5") axle bearings are the same as on F-150's, and 31 spline Explorer axles.
Reply With Quote
  #10  
Old 04-19-2005
V8 Level II's Avatar
RF Veteran
iTrader: (4)
 
Join Date: Nov 2004
Location: Michigan
Posts: 7,833
Quote:
Originally Posted by n3elz
And I posted on those FX4 bearing sizes. Those larger (2.5") axle bearings are the same as on F-150's, and 31 spline Explorer axles.
I saw that, John. I had already answered the same question earlier for Ben on G-E. So I copied that post here more or less intact, just in case it might do someone some good.
Reply With Quote
  #11  
Old 04-19-2005
n3elz's Avatar
RF Veteran
 
Join Date: Jun 2004
Location: Kennett Square, PA
Posts: 10,620
lol! Yes, I had to get that stuff together purely as a practical matter when I went to order a rebuild kit for the rear and they guy asked me, "what size axle bearings?" and I had no idea!
Reply With Quote
  #12  
Old 04-19-2005
n3elz's Avatar
RF Veteran
 
Join Date: Jun 2004
Location: Kennett Square, PA
Posts: 10,620
Quote:
Originally Posted by SoundPer4mance
yeah i guess its possible if the 28 spline axles were longer, and the 31s shorter, than the carrier could be the same, but, the 28 spline axle would have to be as no thicker than the thinnest point of the 31 spline, in the splines, if you know what i mean. also, you would only be using half of the available space in the carrier to hold the axles, which would be silly as far as a strength standpoint.

but like you said, i dont know either, just rationalizing
One thing I can tell you for sure: the carrier BEARINGS are the same. When you get the rebuild kit it comes minus the axle bearings and the same bearings are used for the 31 and 28 spline for the carrier. Then you get the appropriate axle bearing as an "extra". You have to press the carrier bearings on the carrier.
Reply With Quote
  #13  
Old 04-19-2005
Member
 
Join Date: Mar 2005
Location: Cleveland, Ohio
Posts: 288
Hey Ben its me Jeff. :)

Anyway...I'm reading all this the whole while thinking...damnet SCREWED again not getting the "coolest" Ranger available and now I have this silly 28 spline axle...
Maybe I'll call around the yards and find a wrecked FX4 LII if I'm lucky and swap mine out!
Reply With Quote
  #14  
Old 04-19-2005
loneFX4's Avatar
Member
 
Join Date: Jan 2005
Location: Summerville,SC
Posts: 955
i bought my truck used from a dealership and on the description it said fx4 offroad package. truck was built in september of 2001. how do i determine if my truck is a true fx4 or not? itd be nice to know ive got 31 splines and i wouldnt be telling a lie if i slapped an fx4 sticker on there.
Reply With Quote
  #15  
Old 04-19-2005
V8 Level II's Avatar
RF Veteran
iTrader: (4)
 
Join Date: Nov 2004
Location: Michigan
Posts: 7,833
Quote:
Originally Posted by loneFX4
i bought my truck used from a dealership and on the description it said fx4 offroad package. truck was built in september of 2001. how do i determine if my truck is a true fx4 or not? itd be nice to know ive got 31 splines and i wouldnt be telling a lie if i slapped an fx4 sticker on there.
One way would be to measure the OD of the rear axle tubes. The 2002 FX4 should have the larger 3.25" tubes that enclose the 31-spline axles.

Also, since your truck is a manual, it would also have a manual transfer case shifter. If you have a 4x4 switch on the radio bezel, it is not a 2002 FX4 manual. A 2002 manual FX4 should have 2 chrome shifters that look like this:


Last edited by V8 Level II; 04-19-2005 at 10:58 PM.
Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
rear lift block kit for 31 spline axels 05Level2 Suspension Tech 11 12-06-2010 10:33 PM
Toy axels? chainfire Solid Axle Swaps 16 04-22-2010 06:05 PM
8.8 axels HillPrideRanger Drivetrain Tech 4 01-21-2010 08:31 AM
1973 Bronco axels reader585 General Ford Ranger Discussion 10 04-29-2009 08:51 PM
Replacing CV axels Ranger1 Drivetrain Tech 37 05-30-2006 02:13 PM


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 Off
Pingbacks are Off
Refbacks are Off



All times are GMT -6. The time now is 05:21 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.