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Discussion Starter #1
Anyone know for sure what type of limited slip is in the Mazdaspeed3?  The literature states "Tochigi-Fuji torque-sensing limited-slip front differential", but what exactly is the configuration?  I would guess that this is a mechanical torsen type, but I've seen talk about conical rings in other Mazdas.

The reason I ask is that I'm talking to Red Line about recommendations for what gear oil to use, and it makes a big difference whether the limited slip uses clutches or frictional components or not.

Any help is greatly appreciated.
 

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just buy royal purple max gear oil and you'll be all set...none of the redline oils are good for our trannies
 

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[quote author=TRU-BOOST link=topic=66193.msg1135711#msg1135711 date=1168059100]
just buy royal purple max gear oil and you'll be all set...none of the redline oils are good for our trannies
[/quote]

I'm genuinely interested in where you obtained this fact.
 

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Does anyone know if it would be good up here in Canada where it gets very cold in winter ? I saw the specs of Royal Purple and the Pour point is only -26C.

Anyone know a brand that has gear oil that can pour at lower temps, like around -45C and that is compatible with our trans and synth ?
 

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[quote author=Nutari link=topic=66193.msg1135747#msg1135747 date=1168061432]
[quote author=TRU-BOOST link=topic=66193.msg1135711#msg1135711 date=1168059100]
just buy royal purple max gear oil and you'll be all set...none of the redline oils are good for our trannies
[/quote]

I'm genuinely interested in where you obtained this fact.


[/quote]
the one that is good for LSD is too harsh on the soft metals in our GL-4 required trannies.
and the other is not recomender for our LSD.....
just because it is syn and exceeds GL-5 does not make is safe for GL-4


read this ......... http://royalpurple.com/prodsa/mgeara.html

its purfect !!
 

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[quote author=Nutari link=topic=66193.msg1136116#msg1136116 date=1168107437]
http://www.redlineoil.com/products_gearlubricants.asp?productID=39&subCategoryID=15&categoryID=6

http://www.redlineoil.com/whitePaper/10.pdf


[/quote]
uuuhhh.... the first product link says flat out it has no friction modifiers for a LSD so that wont work...not to mention it the wrong weight oil..
and a didnt spen an hour reading the whole other link but from what i saw at a quick look over is that all of the products that said
they worked on LSD and synchros did not say thay would work in a GL-4 trans.

and for the few that DO say for use in GL-4, they dont make any mention of woking with LSD....

use what you like, but i'm going with RP simply because it says it will do exactly what our trannies need !
it looks to me with RL you may get some of what you need but not the full package.
 

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[quote author=TRU-BOOST link=topic=66193.msg1136315#msg1136315 date=1168120607]
[quote author=Nutari link=topic=66193.msg1136116#msg1136116 date=1168107437]
http://www.redlineoil.com/products_gearlubricants.asp?productID=39&subCategoryID=15&categoryID=6

http://www.redlineoil.com/whitePaper/10.pdf


[/quote]
uuuhhh.... the first product link says flat out it has no friction modifiers for a LSD so that wont work...not to mention it the wrong weight oil..
and a didnt spen an hour reading the whole other link but from what i saw at a quick look over is that all of the products that said
they worked on LSD and synchros did not say thay would work in a GL-4 trans.

and for the few that DO say for use in GL-4, they dont make any mention of woking with LSD....

use what you like, but i'm going with RP simply because it says it will do exactly what our trannies need !
it looks to me with RL you may get some of what you need but not the full package.
[/quote]

I was just proving that anyone can just post links.

Oil is oil..

it's 99% preference. Whatever brand you prefer.
 

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i prefer the one that wont f**k up my trans, and am trying to HELP not just post mindless links.
 

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[quote author=TRU-BOOST link=topic=66193.msg1136315#msg1136315 date=1168120607]

and a didnt spen an hour reading the whole other link but from what i saw at a quick look over is that all of the products that said
they worked on LSD and synchros did not say thay would work in a GL-4 trans.

and for the few that DO say for use in GL-4, they dont make any mention of woking with LSD....

use what you like, but i'm going with RP simply because it says it will do exactly what our trannies need !
it looks to me with RL you may get some of what you need but not the full package.
[/quote]

You should have read it. It specifically says that all redline gear oils (that includes the MTL and the MT-90) have friction modifiers required for limited slip operation, except for the two NS labeled ones.
 

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[quote author=Boother link=topic=66193.msg1136322#msg1136322 date=1168120851]
[quote author=TRU-BOOST link=topic=66193.msg1136315#msg1136315 date=1168120607]

and a didnt spen an hour reading the whole other link but from what i saw at a quick look over is that all of the products that said
they worked on LSD and synchros did not say thay would work in a GL-4 trans.

and for the few that DO say for use in GL-4, they dont make any mention of woking with LSD....

use what you like, but i'm going with RP simply because it says it will do exactly what our trannies need !
it looks to me with RL you may get some of what you need but not the full package.
[/quote]

You should have read it. It specifically says that all redline gear oils (that includes the MTL and the MT-90) have friction modifiers required for limited slip operation, except for the two NS labeled ones.
[/quote]

Oops. my fualt. Posted the wrong first link.

http://www.redlineoil.com/products_gearlubricants.asp?productID=35&subCategoryID=15&categoryID=6


Our most popular gear oil, this is 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.
 

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Nope, you are still posting the wrong link. The correct one is for the MT-90:

http://www.redlineoil.com/products_gearlubricants.asp?productID=46&subCategoryID=17&categoryID=7

Popular in Nissan, Toyota and Mazda manual transmissions and transaxles as well as other selected applications, this is a 75W90 GL-4 Gear Oil that’s slightly heavier than MTL. Provides excellent protection of gears and synchronizers and its balanced slipperiness provides a perfect coefficient of friction, allowing easier shifting.
 

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[quote author=Boother link=topic=66193.msg1136332#msg1136332 date=1168121187]
Nope, you are still posting the wrong link. The correct one is for the MT-90:

http://www.redlineoil.com/products_gearlubricants.asp?productID=46&subCategoryID=17&categoryID=7

Popular in Nissan, Toyota and Mazda manual transmissions and transaxles as well as other selected applications, this is a 75W90 GL-4 Gear Oil that’s slightly heavier than MTL. Provides excellent protection of gears and synchronizers and its balanced slipperiness provides a perfect coefficient of friction, allowing easier shifting.
[/quote]

ah.. thank you.

I think I'll go down to the store and buy some right now. :)
 

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Ive used MT-90 in my matrix xrs since the first month of ownership 43k miles ago. I clocked in over 350 total autocross runs in that car and it still shifts as well as it did off the showroom floor (which isnt that great, but still :p) anyway, it requires a gl-4 type oil and the redline fit the bill very well, however, MT-90 does not contain friction modifyers so its not good to use on the ms3 by itself.

just so we are clear on the mt-90 I took this directly from the redline site.

redlineoil.com said:
Popular in Nissan, Toyota and Mazda manual transmissions and transaxles as well as other selected applications, this is a 75W90 GL-4 Gear Oil that’s slightly heavier than MTL. Provides excellent protection of gears and synchronizers and its balanced slipperiness provides a perfect coefficient of friction, allowing easier shifting.

Since MT-90 does not contain friction modifyers for a LSD, it should only be used with redline limited slip friction modifyer added to it. If you feel like purchasing the modifyer, by all means use mt-90, but buyer beware of what you are getting so as not to screw yourself.
 

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[quote author=Boother link=topic=66193.msg1136460#msg1136460 date=1168128564]
I cannot find where it says that MT-90 DOES NOT have friction modiers in it?
[/quote]
take a look at other redline products, those that have friction modifyers in them, state such.
 

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well i'm not trying to argue with you fella's but while you debate which redline oil may or may not work, or might need other additives, i'll get the royal purple stuff and KNOW that is correct !!

i think nutari is just looking for some way to bash me or my knowledge because i dont think that the xede is the greatest thing since sliced bread !!
ever since i said the thing looked sloppy without a P&P harness he has been trying to counter everything i say...but hay i'm a good sport and you'll have to try pretty damn hard to find me wrong on something auto related, i live cars.
 

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Discussion Starter #19
[quote author=Boother link=topic=66193.msg1135820#msg1135820 date=1168069287]
Car and Driver refers to the LSD as a Super LSD supplied by GKN Driveline (they own Tochigi-Fuji).  That would have a conical clutch design to it and thus friction materials.

http://www.gkndriveline.com/driveli...nt/passive-tmds/torque-sensing/super-lsd.html
[/quote]

Thank you, Boother.  There is also a link to a .pdf datasheet for the Super LSD on that page that gives even more information.  I'm going to forward that to Red Line and see what they say. 

For reference, the Car and Driver link is: http://www.caranddriver.com/roadtests/11724/2007-mazdaspeed-3.html
 

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I'm not trying to bash anyone or anything. You were the one doing all the bashing. Look at your first post in this thread.

I asked you to post where it states that redline is BAD for out cars.

I'm still waiting.
 
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