Notices
1999 - 2016 Super Duty 1999 to 2016 Ford F250, F350, F450 and F550 Super Duty with diesel V8 and gas V8 and V10 engines
Sponsored by:
Sponsored by: Real Truck

What diff do I have?

Thread Tools
 
Search this Thread
 
Old Feb 5, 2005 | 04:04 PM
  #1  
sv250's Avatar
sv250
Thread Starter
|
Senior User
Joined: Dec 2004
Posts: 143
Likes: 0
From: Kenner, Louisiana
What diff do I have?

03 F250 6.0 3.73 gears. Is it 10.25 or 10.5? How many splines? Im looking at a limited slip unit for a 10.25 and dont know if it will fit. I did a search and cant find any info anywhere. ID#731053f13 v420f
 
Reply
Old Feb 5, 2005 | 04:35 PM
  #2  
IB Tim's Avatar
IB Tim
FTE Leadership Emeritus
20 Year Member
Veteran: Air Force
Joined: Jan 2003
Posts: 161,999
Likes: 75
From: 3rd Rock
Club FTE Gold Member
...Moved...to SD section
 
Reply
Old Feb 5, 2005 | 04:53 PM
  #3  
DCSpecial's Avatar
DCSpecial
Post Fiend
Joined: Dec 2002
Posts: 6,245
Likes: 1
From: IL, USA
You have a 10.5" rear axle, 35 spline.

The 10.25" and 10.5" used the same carrier.
 
Reply
Old Feb 5, 2005 | 11:29 PM
  #4  
sv250's Avatar
sv250
Thread Starter
|
Senior User
Joined: Dec 2004
Posts: 143
Likes: 0
From: Kenner, Louisiana
Ok will a limited slip chunk from an 86 F350 dually with a 10.25 35 spline fit in my truck? I can get it for a really good price should I or wait and get the Auburn set up?
 
Reply
Old Feb 6, 2005 | 11:12 AM
  #5  
DCSpecial's Avatar
DCSpecial
Post Fiend
Joined: Dec 2002
Posts: 6,245
Likes: 1
From: IL, USA
The limited slip from the '86 10.25" should fit in your 10.5" rear axle.

Is it a stock unit from the '86?
If so there are probably some people here with stock limited slips with less miles and wear that they'd sell cheap.

Personally, I feel if you are going through the labor of installing a limited slip I would get a better unit than the stock ls.
 
Reply
Old Feb 6, 2005 | 11:33 AM
  #6  
jcgswp's Avatar
jcgswp
Senior User
Joined: Nov 2004
Posts: 156
Likes: 1
From: Georgia
If your going through the trouble to swap the diff, definately hold out for something better than the stock limited slip.
 
Reply
Old Feb 6, 2005 | 01:46 PM
  #7  
sv250's Avatar
sv250
Thread Starter
|
Senior User
Joined: Dec 2004
Posts: 143
Likes: 0
From: Kenner, Louisiana
DCSpecial, your right. After some thought, I decided to just wait and get the Auburn. Thanks for all your help.
 
Reply




All times are GMT -5. The time now is 12:05 AM.

story-0
Every 2026 Ford Engine Explained

Here's everything you need to know about every Ford engine available for the 2026 model year.

By Brett Foote | 2026-06-05 12:58:01


VIEW MORE
story-1
10 Ugly Ford Trucks That We Still Kinda Love

Slideshow: 10 ugly Ford trucks that we still kinda love.

By Joe Kucinski | 2026-06-03 09:51:16


VIEW MORE
story-2
10 Things Every Truck Owner NEEDS (2026 Edition)

Slideshow: the best gifts for dads & grads

By Michael S. Palmer | 2026-06-03 15:43:58


VIEW MORE
story-3
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath

Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.

By Verdad Gallardo | 2026-06-03 11:38:36


VIEW MORE
story-4
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer

Slideshow: 10 most expensive Ford trucks ever sold on Bring a Trailer.

By Joe Kucinski | 2026-05-27 16:24:34


VIEW MORE
story-5
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)

Here's everything that has changed for the latest model year.

By Brett Foote | 2026-05-27 16:17:28


VIEW MORE
story-6
Top 10 Ford Truck Tragedies

Slideshow: Top 10 Ford truck tragedies.

By Joe Kucinski | 2026-05-18 19:34:33


VIEW MORE
story-7
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make

And it might be even better than that.

By Brett Foote | 2026-05-18 19:26:42


VIEW MORE
story-8
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!

Slideshow: Does lowering an F-150 Lobo RUIN the ride quality?

By Michael S. Palmer | 2026-05-18 19:20:37


VIEW MORE
story-9
Ford's 2001 Explorer Sportsman Concept Looks For a New Home

Slideshow: Ford's bizarre fishing-themed Explorer concept has resurfaced after spending decades largely forgotten.

By Verdad Gallardo | 2026-05-12 18:07:46


VIEW MORE