8.8 28 spline or 31 spline axles - 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 09-13-2015
Member
Thread Starter
 
Join Date: Sep 2015
Location: Monrovia, Md.
Posts: 6
8.8 28 spline or 31 spline axles

Hi Guys,
This is my first post. I been sitting back reading the mail.
The pinion bearing and spider gears are going bad in my 04 4.0 Ranger(175K). The rear axle is a 8.8 w/4:10 trac-loc. I have a 8.8 from a 00(369K) Ranger w/4:10 trac-loc that I dis-assembled and found 28 spline axles. I was about to order spider gears for my my 04 but know I don't know if it has 28 or 31 spline axles. Is there a was to identify what axle spline I have without dis-assembling the rear in the 04? Thanks
Reply With Quote
  #2  
Old 09-13-2015
RazorsEDGE's Avatar
There's no lifeguard in the gene pool
iTrader: (4)
 
Join Date: Aug 2006
Location: New Mexico
Posts: 7,501
Unless it's an fx4 it's got 28 spline.
Reply With Quote
  #3  
Old 09-13-2015
Member
Thread Starter
 
Join Date: Sep 2015
Location: Monrovia, Md.
Posts: 6
Quote:
Originally Posted by RazorsEDGE View Post
Unless it's an fx4 it's got 28 spline.
It is a FX4, so I going to assume it has 31spline axles and order my parts.


Thanks for the quick reply.
Reply With Quote
  #4  
Old 09-13-2015
RazorsEDGE's Avatar
There's no lifeguard in the gene pool
iTrader: (4)
 
Join Date: Aug 2006
Location: New Mexico
Posts: 7,501
Since it's an FX4 it should be 31 spline but I'd measure the axle tubes just to be sure. 31 spline is 3.25" and 28 spline is 3".
Reply With Quote
  #5  
Old 09-13-2015
Member
Thread Starter
 
Join Date: Sep 2015
Location: Monrovia, Md.
Posts: 6
Quote:
Originally Posted by RazorsEDGE View Post
Since it's an FX4 it should be 31 spline but I'd measure the axle tubes just to be sure. 31 spline is 3.25" and 28 spline is 3".

That's what I was looking for. A way to accurately determine what spline axles I have. Measuring the axle tubes is a simple and easy means to accomplish this. Thanks again!!!
Reply With Quote
  #6  
Old 09-13-2015
vista4.0's Avatar
Member
iTrader: (3)
 
Join Date: Jan 2009
Location: Beaver Falls, PA
Posts: 2,824
Aren't the axle tubes the same size? The just neck down to 3" for the bearing on the 28spline. I have a 28spline and when my spiders went I couldn't find replacements anywhere. Ended up buying a LSD mustang carrier on eBay to steal parts off.
Reply With Quote
  #7  
Old 09-13-2015
Member
Thread Starter
 
Join Date: Sep 2015
Location: Monrovia, Md.
Posts: 6
Quote:
Originally Posted by vista4.0 View Post
Aren't the axle tubes the same size? The just neck down to 3" for the bearing on the 28spline. I have a 28spline and when my spiders went I couldn't find replacements anywhere. Ended up buying a LSD mustang carrier on eBay to steal parts off.
I haven't measured the axle tubes yet, will do that tomorrow, but even if they neck down to 3" at the bearings that will tell me they're 28 or 31 spline. I've found 2 places that sell spiders for 28 spline trac-loc. The first is America muscle and the other is Randy's gears. Thanks for the replies.
Reply With Quote
  #8  
Old 09-14-2015
99offroadrngr's Avatar
TOYOTA
iTrader: (37)
 
Join Date: Jul 2007
Location: Massachusetts
Posts: 11,728
04 fx4 is a 28 spline

04 fx4 Level II is a 31 spline

you should have a 28 spline if you don't have a Level II
Reply With Quote
  #9  
Old 09-14-2015
camodown's Avatar
Lost in Nowhere
iTrader: (3)
 
Join Date: Feb 2007
Location: Midland, TX
Posts: 5,029
8.8 28 spline or 31 spline axles

Quote:
Originally Posted by 99offroadrngr
04 fx4 is a 28 spline

04 fx4 Level II is a 31 spline

you should have a 28 spline if you don't have a Level II
^^^X2.

But a 31 spline ranger axle tapers down right before the drum from I believe 3.25" to 3". 28 spline is the same measurement all the way. There used to be a picture of it but it's too late to search for it.
Reply With Quote
  #10  
Old 09-14-2015
RazorsEDGE's Avatar
There's no lifeguard in the gene pool
iTrader: (4)
 
Join Date: Aug 2006
Location: New Mexico
Posts: 7,501
I just measured my 28 spline and the tube is 3".
Reply With Quote
  #11  
Old 09-14-2015
Member
Thread Starter
 
Join Date: Sep 2015
Location: Monrovia, Md.
Posts: 6
Quote:
Originally Posted by RazorsEDGE View Post
I just measured my 28 spline and the tube is 3".
I ordered my parts today they should be here Tues. or Wed.


I measured the 2 diffs. I have and both are identical. The axle tube when it comes out of the center section is 3" after passing the shock mount but before the spring perch the axle tube tapers down to 2.75" and maintains that measurement until it meets the backing plate. If you stand back and look at it or run your hand along the tube the transition is noticeable. Hope this helps somebody. Thanks for the replies.
Reply With Quote
  #12  
Old 09-16-2015
Member
Thread Starter
 
Join Date: Sep 2015
Location: Monrovia, Md.
Posts: 6
Quote:
Originally Posted by Tinkerr View Post
I ordered my parts today they should be here Tues. or Wed.


I measured the 2 diffs. I have and both are identical. The axle tube when it comes out of the center section is 3" after passing the shock mount but before the spring perch the axle tube tapers down to 2.75" and maintains that measurement until it meets the backing plate. If you stand back and look at it or run your hand along the tube the transition is noticeable. Hope this helps somebody. Thanks for the replies.
My parts arrived Tues. Happy days, until I opened the box labeled Ford limited slip spider gears and found spiders for a open rear. Called them, was told that's what their listing shows. The guy was a order taker!!!
Called all the usual suspects, no luck, was even told the 28 spline trac-lock is not rebuildable. Finally found them at West Coat Differential. I even had they guy take them out of the package to confirm the were for a posi. Now we wait and see!!!
Reply With Quote
  #13  
Old 09-16-2015
vista4.0's Avatar
Member
iTrader: (3)
 
Join Date: Jan 2009
Location: Beaver Falls, PA
Posts: 2,824
Quote:
Originally Posted by Tinkerr View Post
My parts arrived Tues. Happy days, until I opened the box labeled Ford limited slip spider gears and found spiders for a open rear. Called them, was told that's what their listing shows. The guy was a order taker!!!
Called all the usual suspects, no luck, was even told the 28 spline trac-lock is not rebuildable. Finally found them at West Coat Differential. I even had they guy take them out of the package to confirm the were for a posi. Now we wait and see!!!
That sucks. But looks like you have had the same problem I did so far with 28spline spiders. Hopefully west coast knows what they are talking about
Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
31 Spline axles mldehan Drivetrain Tech 6 03-10-2013 07:58 PM
Checking Interest: Explorer axles 31 spline 8.8 4.56's tru trac (WI) topofffun Engine & Drivetrain 8 10-17-2010 07:28 PM
Any direct replacement axles for Level II 31-spline rear? KLC Drivetrain Tech 6 06-18-2010 01:29 PM
Interchangable items from 28 spline to 31 spline 01xltranger4x4 Drivetrain Tech 25 05-18-2007 01:09 PM
Modified Duff traction bars for use with 31 spline axles n3elz Suspension Tech 99 07-16-2005 01:29 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 04:15 PM.


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.