Friction modifier

[mackdog2008]

So I put new gear oil in my differential, went with amsoil severgear 75w 140 and added 4oz of amsoil slip lock, I am getting a whine from the clutches when I turn.
I
bought a bottle of motorcraft friction modifier, is it safe to put that in there since there is already the amsoil slip lock in it ?

 

[Gpcalero]

So I put new gear oil in my differential, went with amsoil severgear 75w 140 and added 4oz of amsoil slip lock, I am getting a whine from the clutches when I turn.
I
bought a bottle of motorcraft friction modifier, is it safe to put that in there since there is already the amsoil slip lock in it ?

Depends. What diff do you have? The reason I ask, is because you don't need to add friction modifier to the Torsion differentials.

Also, I wouldn't mix two different brands.

 

[el jefe 302]

OP do you have a track pack car?

 

[mackdog2008]

OP do you have a track pack car?

No, it is a regular limited slip differential.

 

[blackbeast12]

Amsoil pruducts work better with each other so drain what you got and go with amsoil's friction modifier!

 

[Riptide]

I've had problems due to adding friction modifier to a fill that already had it in there to begin with. More is not always better.

 

[mackdog2008]

Amsoil pruducts work better with each other so drain what you got and go with amsoil's friction modifier!

That's what I have in there now is all amsoil, I need to know if I can add some motorcraft friction modifier because the amsoil stuff is causing my clutches to make noise.

 

[mattaglover]

That's what I have in there now is all amsoil, I need to know if I can add some motorcraft friction modifier because the amsoil stuff is causing my clutches to make noise.

In my opinion it wont hurt anything to add a little ford friction modifier. I am assuming you added the whole bottle of amsoil modifier?

 

[Zemedici]

I've had problems due to adding friction modifier to a fill that already had it in there to begin with. More is not always better.

This. More is oftentimes worse in terms of friction modifier compared to less.

In my opinion it wont hurt anything to add a little ford friction modifier. I am assuming you added the whole bottle of amsoil modifier?

See above.

 

[mackdog2008]

This. More is oftentimes worse in terms of friction modifier compared to less.



See above.

I will drain it and refill with new fluid, then add 2oz of ford friction modifier and see what happens.

 

[Slowb00st]

I was in about in the same boat, i used redline shock proof that does not have any friction modifyer and about 3 oz of torco type F modifyer and had mostly when the car was cold (Im in Puerto Rico so at coldest 80 F) diff noise that most time I can discribe it as power steering noise. Added what i think was 2 oz of the ford racing modifyer (made a mess) and noise gone, only about 1k miles on it.

 

[kona 199]

i while back i had to put two 4 oz bottles in my f150 to stop the chatter so i dont think more will hurt anything.

 

[M91196]

i while back i had to put two 4 oz bottles in my f150 to stop the chatter so i dont think more will hurt anything.

I think more is not better, it's designed to ease the clutches slipping past each other.
YMMV

 

[me32]

Ive heard of issues with other friction modifier other than motorcraft. I recommend staying with the proper amount of the full 4oz motorcraft friction modifier.

 

[kona 199]

when i turned at any throttle level i had bad chatter.the two bottles was for the size of the 10.25 gear housing.

 

[4VFTW]

drain and refill with Royal Purple it has FM in it already

 

[kona 199]

drain and refill with Royal Purple it has FM in it already

i have never used any royal purple products.in your op is it worth the $$$$?

 

[4VFTW]

i have never used any royal purple products.in your op is it worth the $$$$?

was good enough for my car