Differential oil additive?
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Joined: Sep 2004
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From: Australia
Differential oil additive?
Hi everyone.
I am after some info for a F250 7.3L Turbo, 2003 model.
Changing the diff oils today, I'm using 75w140 GL-5 full synthetic (as required).
On other Ford high performance vehicles I have used an additive; Ford MOTORSPORT Friction Modifier M-19546-A
Can anyone tell me if this I can use this in the F250 LSD diff, back & front?
Also, what type of diffs do these F250's have?
Thanks in advance.
I am after some info for a F250 7.3L Turbo, 2003 model.
Changing the diff oils today, I'm using 75w140 GL-5 full synthetic (as required).
On other Ford high performance vehicles I have used an additive; Ford MOTORSPORT Friction Modifier M-19546-A
Can anyone tell me if this I can use this in the F250 LSD diff, back & front?
Also, what type of diffs do these F250's have?
Thanks in advance.
FTE Leadership Emeritus
Joined: May 2001
Posts: 13,653
Likes: 6
From: Cabot, Arkansas
Your front diff is either a Dana 50, or 60 and takes non synthetic 75w-90. It also is an open differential.
The rear is a corporate 10.5" (Built in Sterling Mich., not Sterling Inc.). You can use the motorsport friction modifier or just abut any other. In fact, a year or so ago the local Ford dealers were recommending the mopar friction modifier as the Ford stuff was too slick. I chose to run mine without any modifier and it works a ton better. It's actually a limited slip now as opposed to the limited grip it was before.
The rear is a corporate 10.5" (Built in Sterling Mich., not Sterling Inc.). You can use the motorsport friction modifier or just abut any other. In fact, a year or so ago the local Ford dealers were recommending the mopar friction modifier as the Ford stuff was too slick. I chose to run mine without any modifier and it works a ton better. It's actually a limited slip now as opposed to the limited grip it was before.
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