Upgraded Differential on 2nd Gen?

[98eb5.4]

Hey Guys....and gals. My '03 Expy has open differentials

how'd you find that out? what gear ratio?

 

[JExpedition07]

https://www.carid.com/ford-performa...204-f318c.html?singleid=56773784&url=84934582

Brand new ford ones. (LSD).

 

[98eb5.4]

https://www.carid.com/ford-performa...204-f318c.html?singleid=56773784&url=84934582

Brand new ford ones. (LSD).

that's for 8.8

 

[Vancouver Bob]

Personally, I would install an E-Locker.

Hi Wizard... would you happen to know who makes one for the Ford 9.75" rear end with IRS? I can find lockers for the 2002 or earlier with the solid axles but nothing for the 2003 and on. I'm told it's because of how the axle shafts are held into the side gears (ring clip vs c clip). The ring clips require side gears with a retention feature. Evidently not something most aftermarket differentials can accommodate. In talking with ARB, they said I'd have to have the side gears modified... probably voids all warranties .

 

[Vancouver Bob]

https://www.carid.com/ford-performa...204-f318c.html?singleid=56773784&url=84934582

Brand new ford ones. (LSD).

Thanks, JE07. But when I look at that I think it's for the front differential...


The rear is a 9.75 34 spline. But I'm sure I can get a new replacement LSD since they did offer them for my model year.

 

[Vancouver Bob]

that's for 8.8

Ha!! You beat me to it!

 

[98eb5.4]

Thanks, JE07. But when I look at that I think it's for the front differential...

View attachment 22224
The rear is a 9.75 34 spline. But I'm sure I can get a new replacement LSD since they did offer them for my model year.

but u said?

"My '03 Expy has open differentials"

what gear ratio?

 

[98eb5.4]

pretty sure, all 3.73s were lsd,

& yes, if your original diff was lsd, you can just replace the clutch pack,

can't just do that tho with an original open diff

 

[98eb5.4]

Probably quickest and "easiest" way to do it is just go to a salvage yard and find an Expy or Navigator with a "H6" code on the door jamb sticker ( 3.73 Limited Slip ), and pull and swap with that complete axle. Unless you're going rock crawling that should be good enough. The limited slip axles were actually more common than non-limited slip .

op hasn't said what gear ratio they have, if not 3.73, they have to match, front & back

op needs to know what starting with? before what next

expys had 3.73 - .55 -.31 sized 8.8 or 9.75

http://www.fourwheeler.com/how-to/transmission-drivetrain/129-0802-ford-f150-975-axle-build/

 

[JExpedition07]

Thanks, JE07. But when I look at that I think it's for the front differential...

View attachment 22224
The rear is a 9.75 34 spline. But I'm sure I can get a new replacement LSD since they did offer them for my model year.

Oops sorry. Many options for LSD here’s a rear https://www.carid.com/2006-ford-exp...gear-limited-slip-differential-503435323.html