Motul gear 300 or Redline MT90?

[SXE10]

Originally Posted by Nardi330

if you have good knowledge about oil and stuff as you implied, maybe you can supply us with factual information to show that Redline 75w90NS is or isn't the correct oil for our LSD?

Oh so you put in in the diff. It's primarily manual transmission oil. Although it can be used in clutch type LSD for maximum lock up. It all makes sense now. You should have used this 75w-90 GL5 >> http://www.redlineoil.com/product.aspx?pid=133&pcid=4

You didn't research your product properly before purchasing it now did you. Also the factory spec is 75w-85 GL5, but there's no harm running 75w-90

[Nardi330]

Originally Posted by SXE10

Oh so you put in in the diff. It's primarily manual transmission oil. Although it can be used in clutch type LSD for maximum lock up. It all makes sense now. You should have used this 75w-90 GL5 >> http://www.redlineoil.com/product.aspx?pid=133&pcid=4

You didn't research your product properly before purchasing it now did you.

i did. both are gear oil, both are GL5, both can be used for transaxle.

http://www.redlineoil.com/product.aspx?pid=47&pcid=7

the difference, according to Redline is fiction modifier. 75w90 has it but 75w90NS doesn't. Our LSD isn't a clutch type so doesn't need fiction modifler and so NS was selected.

also 75w90 is not safe for gearbox but 75w90NS is. both can be used for diff.

regardless my diff doesn't like the 75w90NS and i'm happy with Motul Gear 300.

[SXE10]

Originally Posted by Nardi330

i did. both are gear oil, both are GL5, both can be used for transaxle.
http://www.redlineoil.com/product.aspx?pid=47&pcid=7

the difference, according to Redline is fiction modifier. 75w90 has it but 75w90NS doesn't. Our LSD isn't a clutch type so doesn't need fiction modifler and so NS was selected.

also 75w90 is not safe for gearbox but 75w90NS is. both can be used for diff.
regardless my diff doesn't like the 75w90NS and i'm happy with Motul Gear 300.

There's more difference to these oils than just friction modifier, thats why your diff didn't like it. As they say a little bit of knowledge can be a dangerous thing...

You should run MT-90 GL4 in the gearbox not NS which is GL5. Also NS is not suitable for a Torsen LSD (you've proved that). Here's the service schedule for future reference >> http://www.ft86club.com/forums/showthread.php?t=15172

[Nardi330]

Originally Posted by SXE10

There's more difference to these oils than just friction modifier, thats why your diff didn't like it. As they say a little bit of knowledge can be a dangerous thing...

You should run MT-90 GL4 in the gearbox not NS which is GL5. Also NS is not suitable for a Torsen LSD (you've proved that). Here's the service schedule for future reference >> http://www.ft86club.com/forums/showthread.php?t=15172

I ran MT90 in the gear box. i think i have stated this many times already.....

the Redline website didn't say anything about NS not suitable for torsen. if it did there is no way i would have bought it. in fact Redline didn't say anything about torsen suitability for 75w90 and 75w90NS.

i guess i learnt the hard way but someone has to do it.

thanks for the service schedule.

[AZP Installs]

Originally Posted by Nardi330

I ran MT90 in the gear box. i think i have stated this many times already.....

the Redline website didn't say anything about NS not suitable for torsen. if it did there is no way i would have bought it. in fact Redline didn't say anything about torsen suitability for 75w90 and 75w90NS.

i guess i learnt the hard way but someone has to do it.

thanks for the service schedule.

Actually NS or non-NS should not make a difference in the rear diffy of a torsen unit. Mechanical rear diffys REQUIRE the NS additives, but should not effect a viscous or torsen rear diffy. It is a GL-5 which is what the rear diffy calls for.

-Mike Paisan


11+ Years Maintaining, Modifying and Educating TriState Subaru Enthusiasts.
Call directly as We carry almost every manufacturer now, so before you buy parts call us.
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[Nardi330]

Originally Posted by AZP Installs

Actually NS or non-NS should not make a difference in the rear diffy of a torsen unit. Mechanical rear diffys REQUIRE the NS additives, but should not effect a viscous or torsen rear diffy. It is a GL-5 which is what the rear diffy calls for.

-Mike Paisan

thanks Mike. this is what i think too.....

[Daless2]

I see many have posted recommendations on differential gear oil but I find this rather confusing.

According to the Toyota/Scion Service manual, Toyota recommends

LT 75W-85 GL-5 (or equivalent) for Non Limited Slip Differentials

And

LX 75W-85 GL-5 (or equivalent) for Limited Slip Differentials

Both of this are synthetic gear oils, both have the same weight, yet they are different, as indicated by the Non-LSD (LT) vs. with LSD (LX).

I do realize there are no friction plates in the rear end, but there is certainly something different between the two gear oils Toyota recommends.

Does anyone “know” what those differences are?

Doesn’t make sense to me to change out gear oil and replace with aftermarket oil for “Non- LSD” if it does not have the properties Toyota recommends in the “With-LSD” installed in the car.

Your thoughts would be appreciated.

[SXE10]

I'd say LX & LT are just Toyota USA specs. They're not API or SAE as far as I'm aware. The same oil is used in other Toyota vehicles with plate type LSD, so I'd say LX has friction modifier in it & LT doesn't.
The NZ/AU service schedule makes no mention of LX or LT. Just use a GL5 designed for an LSD & you'll be right.


*EDIT*
Found some basic spec on "TOYOTA GENUINE DIFFERENTIAL GEAR OIL LT 75W-85"
Part number 08885-02506
76 cSt @ 40°c
11.5 cSt @ 100°c

They're a Torsen LSD so don't require friction modifiers.

[gmookher]

Originally Posted by SXE10

Just use a GL5 designed for an LSD & you'll be right.

Whatever you do , do NOT use a GL5 in the transmission
It calls for a GL3 which has been superceded by GL4

however it does not work the same way b/w GL4 and GL5

GL5 is fine in the diff

forget SAE spec. consider the actual oil used and its viscosity

[Amadeus]

Is there any harm running the Motul GEAR 300 75W-90 LS even though we don't need the friction modifiers in the torsen differential? Is the non LS Motul GEAR 300 75W-90 better for our diff or does it not matter at all which version we use?

[AZP Installs]

Originally Posted by Amadeus

Is there any harm running the Motul GEAR 300 75W-90 LS even though we don't need the friction modifiers in the torsen differential? Is the non LS Motul GEAR 300 75W-90 better for our diff or does it not matter at all which version we use?

In the rear diff either one works. In the trans you don't want to LS modifier.

-Mike Paisan


11+ Years Maintaining, Modifying and Educating TriState Subaru Enthusiasts.
Call directly as We carry almost every manufacturer now, so before you buy parts call us.
Like us on Facebook! | E-mail: sales@azpinstalls.com | 725 Fairfield Ave | Kenilworth, NJ 07033 | 908.248.AZP1 (2971) | T-1 Certified Amsoil Direct Jobber |AIM: AZP Installs
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[fenixv8]

So can I use this is the Tranny and Diff or just the DIff?

http://www.motul.com/ca/en-US/produc...%5Brange%5D=25

[Hanakuso]

Originally Posted by fenixv8

So can I use this is the Tranny and Diff or just the DIff?

http://www.motul.com/ca/en-US/produc...%5Brange%5D=25

I believe the Motul 300 75W90 can be used in both. The Motul 300 75W90 LS can only be used in the LSD.

[AZP Installs]

Originally Posted by Hanakuso

I believe the Motul 300 75W90 can be used in both. The Motul 300 75W90 LS can only be used in the LSD.

+1 That is correct.

-Mike Paisan


11+ Years Maintaining, Modifying and Educating TriState Subaru Enthusiasts.
Call directly as We carry almost every manufacturer now, so before you buy parts call us.
Like us on Facebook! | E-mail: sales@azpinstalls.com | 725 Fairfield Ave | Kenilworth, NJ 07033 | 908.248.AZP1 (2971) | T-1 Certified Amsoil Direct Jobber |AIM: AZP Installs
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