What Brand Differential Fluid (I assume 75w-140w)

[Cobra_Kid]

Ok, so if I use the standard Royal Purple or Lucas Differential fluid at 75W-140w...will I need a 4oz bottle of friction modifier too?

What other brands/weights do you all like?

Thanks...

 

[HandsomeRob]

Yes you need the Motorcraft Fruction Modifier. I used Lucas

 

[Murder Snake]

Amsoil 75-140W severe duty with the friction modifier.

 

[pacific4v]

Royal purple says it already contains the friction modifier. I didn't add any extra with it.

 

[Cobra_Kid]

Ok, so RP doesn't need any but the others do...ugh.

 

[MARK C]

The bottle of friction mod. is cheap.

 

[Cobra_Kid]

ok.....I understand that.....just wanted to make sure to use it right.

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[gq916]

the shop i got my gears done from used 75w-90 valvoline (not synthetic) and i provided the friction modifier