Redline 75W-90NS + Mopar Friction Modifier OK in Differential???

[onerareviper]

Viperholics,

Is it O.K. to use Redline Synthetic 75W-90NS + Mopar Friction Modifier in a OEM 3.07 differential in a GTS? This is what a local expert (friend) recommended, but I just wanted to make sure - since it says 75W-140 + additive in the service manual. The manual states 41 ounces of fluid + 4 ounces of additive, which he concurred. Not to mention he gave me 2 pints for free....

Thanks in advance...

P.S. - Below is the product description from the Redline webpage. I believe the only difference between the 75w90NS and the 75w90 is the later already has the friction modifier additive.

PRODUCT APPLICATION

75W90 NS- a GL-5 which does not contain the friction modifiers for limited-slip hypoid differentials. This makes the transmission synchronizers come to equal speeds more quickly, allowing faster shifting and much easier low-temperature shifting. Can also be used in racing limited-slip differentials where weak spring design causes too much wheel spin.

75W90 Gear Oil - the preferred product in nearly all car and light truck differentials, both conventional and limited-slip. 75W90 is preferred for most racing applications. It contains friction modifier which is recommended for limited-slip units. 75W90 Gear Oil can be used in many transmissions and transaxles; however, other Red Line lubricants have better frictional properties for rapid synchronization. Exceeds API GL-5.

 

[Nasty 10]

<FONT COLOR="red">Ams</FONT c><FONT COLOR="blue">oil</FONT c> makes a 75w-140 in their best product Series 2000. It doesn't need the additive but you can add it if you like. If your interested in a price email me

 

[HP]

I use the Redline synthetic 75/140 - it has the friction modifier included. I get it from JEGS - good price!

 

[onerareviper]

Fella's,

Sorry for the confusion. Let me rephase the question:

I already have two bottles of Redline 75W-90 NS + Mopar additive. Is this O.K. to use?

Thanks.....

 

[Steve 00RT/10]

I would not use 75W-90 gear lube where the application calls for 75W-140.

From an above poster, Redline must make a 75W-140. I use Amsoil Series 2000 75W-140 which has the friction modifiers in it.

Steve