Notices
1997 - 2003 F150 1997-2003 F150, 1997-1999 F250LD, 7700 & 2004 F150 Heritage
Sponsored by:
Sponsored by: Auxito

Limited Slip Question?

Thread Tools
 
Search this Thread
 
Old Aug 5, 2008 | 11:40 PM
  #1  
jdrahush's Avatar
jdrahush
Thread Starter
|
Senior User
Joined: Apr 2008
Posts: 125
Likes: 0
From: London, Ontario
Limited Slip Question?

Ok guys I know this might seem like a stupid question, but I have a 2002 F-150 4X2 with a 4.6 (not that it matters) and and I want/need a Limited Slip Differential. I currently have just a regular dif with 3.09 gears (I think) and I was wondering if there was anyway to install a LSD without doing axle swap? What would be the cheapest? Thanks for any input.
 
Reply
Old Aug 6, 2008 | 09:42 AM
  #2  
lonerangerinaz's Avatar
lonerangerinaz
Senior User
Joined: Nov 2003
Posts: 108
Likes: 0
You can install a LS diff. using your own axle. That's what most guys do "including myself". Around here "Arizona" it would run about $800.00 for the LS diff and install. You might be able to find an axle for a better price but It would hard to find one with the factory LS that match your gears. Most trucks came with 3.55. If you have the 3.08 gears it might be better to get an axle with the 3.55 and LS. That would make your truck pull alot better.
 
Reply
Old Aug 6, 2008 | 01:43 PM
  #3  
92merc's Avatar
92merc
Tuned
25 Year Member
Joined: Dec 1999
Posts: 464
Likes: 1
From: Bismarck USA
Another advantage to the axle swap method would be you get the larger rear end, or at least you could look for one. An axle from the 5.4 will have a larger rear end and help towing capacity.
 
Reply
Old Aug 6, 2008 | 01:54 PM
  #4  
galaxie641's Avatar
galaxie641
Postmaster
Joined: Nov 2006
Posts: 4,517
Likes: 3
From: SE Wyoming
For reference you have an 8.8 rear, the larger rear is a 9.75. I don't think I've ever seen a 3.08 LS in these trucks. Would be interesting to see what is out there.
 
Reply
Old Aug 6, 2008 | 05:47 PM
  #5  
mattri's Avatar
mattri
Laughing Gas
20 Year Member
Joined: Oct 2003
Posts: 896
Likes: 6
When did ford quit using the 8.8 or have they?
 
Reply
Old Aug 6, 2008 | 07:08 PM
  #6  
jdrahush's Avatar
jdrahush
Thread Starter
|
Senior User
Joined: Apr 2008
Posts: 125
Likes: 0
From: London, Ontario
Yeah I was thinking it would be better with 3.55 gears but how much would that effect my gas mileage? Normally I wouldn't ask but gas is like $1.30 a liter here in Ontario. Also how hard would be to do that axle swap myself?
 
Reply
Old Aug 6, 2008 | 07:29 PM
  #7  
Bobby82490's Avatar
Bobby82490
Posting Guru
Joined: Dec 2006
Posts: 1,466
Likes: 0
From: N. Fort Myers,FL
Nope they are still using the 8.8 just the F/E-150s with the 5.4 use the larger/stronger 9.75 rear end.
 
Reply

Trending Topics

Old Aug 7, 2008 | 06:25 AM
  #8  
Ron W.'s Avatar
Ron W.
Elder User
Joined: Jan 2008
Posts: 589
Likes: 0
From: Stockton Ca.
Originally Posted by jdrahush
Ok guys I know this might seem like a stupid question, but I have a 2002 F-150 4X2 with a 4.6 (not that it matters) and and I want/need a Limited Slip Differential. I currently have just a regular dif with 3.09 gears (I think) and I was wondering if there was anyway to install a LSD without doing axle swap? What would be the cheapest? Thanks for any input.
There should be a metal tag attached to one of the differential cover bolts that will tell you the ring gear diameter and gear ratio of the truck. Find one at a salvage yard that has the same info on it but with a "L" in the ratio numbers (3L08 or 3L55). Not sure but I'm thinking if you do change ratio you'll need to reprogram the speedometer. Might be easier to do the axle swap than replace the carrier assembly.
 
Reply
FTE Stories

Ford Trucks for Ford Truck Enthusiasts

story-0

This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level

 Verdad Gallardo
story-1

Top 10 Fords at 2026 Carlisle Ford Nationals

 Joe Kucinski
story-2

3 Best / 3 Worst Parts of Modern Ford Ownership

 Brett Foote
story-3

10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches

 Pouria Savadkouei
story-4

Every 2026 Ford Engine Explained

 Brett Foote
story-5

10 Ugly Ford Trucks That We Still Kinda Love

 Joe Kucinski
story-6

10 Things Every Truck Owner NEEDS (2026 Edition)

 Michael S. Palmer
story-7

Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath

 Verdad Gallardo
story-8

Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer

 Joe Kucinski
story-9

2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)

 Brett Foote




All times are GMT -5. The time now is 10:10 PM.

story-0
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level

Slideshow: The VelociRaptor Expedition gains a lift, upgraded suspension, Brembo brakes, and trail-ready equipment while retaining the stock 440-horsepower EcoBoost V6.

By Verdad Gallardo | 2026-06-12 11:01:55


VIEW MORE
story-1
Top 10 Fords at 2026 Carlisle Ford Nationals

Slideshow: Top 10 Fords at 2026 Ford Nationals

By Joe Kucinski | 2026-06-09 11:10:08


VIEW MORE
story-2
3 Best / 3 Worst Parts of Modern Ford Ownership

Based on years of owning multiple modern Ford products.

By Brett Foote | 2026-06-09 10:53:36


VIEW MORE
story-3
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches

SPONSORED: From muddy boots to rain-soaked cargo, these upgrades address some of the most common frustrations Ford truck owners face every day.

By Pouria Savadkouei | 2026-06-08 18:50:34


VIEW MORE
story-4
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-5
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-6
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-7
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-8
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-9
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