Front diff oil change
Thread Starter
5 Year Member
Joined: Sep 2019
Posts: 276
Likes: 49
Front diff oil change
It’s tone to change the front diff oil on my 02 screw 5.4.
I’ve got some Redline 75-140 laying around from when I did my rear diff. I didn’t have to add any modifiers when I did that.
from what I’ve read I should be fine, but I just want to double check. Do I have to add a friction modifier in the front diff with the Redline oil?
Thank you.
I’ve got some Redline 75-140 laying around from when I did my rear diff. I didn’t have to add any modifiers when I did that.
from what I’ve read I should be fine, but I just want to double check. Do I have to add a friction modifier in the front diff with the Redline oil?
Thank you.
has left the building
Joined: Jan 2020
Posts: 9,647
Likes: 3,421
Note:
Friction modifier additives are only used in a differential that has limited slip. By that I mean the traditional LS with friction clutch material.
Note 2:
I don't believe Ford has offered a limited slip front differential?
Friction modifier additives are only used in a differential that has limited slip. By that I mean the traditional LS with friction clutch material.
Note 2:
I don't believe Ford has offered a limited slip front differential?
5 Year Member
Joined: Aug 2015
Posts: 229
Likes: 71
From: The Tundra
Be sure to loosen the upper fill plug first. I don’t believe mine had been off since the factory in 2000. A propane torch and a impact driver, with two extensions. I still barely got it off without stripping the 3/8” square holes plug.
