Would someone tell me the correct name of the Mitsubishi DiaQueen oil product for the rear diff and transfer case. Is the same product used in both?

And what is the recommendation about friction modifier for the rear diff, is it necessary and if so what brand/name?
Thanks!

It is called Diaqueen.......I would recommend the additive Mits use in the diff but it certainly is not cheap

Thanks Mal! You recommend the modifier?
So what potentially happens if it isnt used?

Bump for interest! And possibly nervousness - transmission service involved diff' and transfer case oil change, if there's supposed to be something in there I want it in there.

I've used Diaqueen since it was recommended by Mal. Also use the genuine "Friction Modifier for LSD oil" which is a genuine Mitsubishi additive (part number MB664682) about $40 for 100ml. Use 50ml in the rear diff only NOT the transfer case. I can't detect any diff noise and my AWD is approaching 270K.

Er, now im confused again.
Is the Diaqueen for the rear diff a different product than the Diaqueen for the TC, or are they the same?
Is the LSD a sealed VCU type, with the oil separate from the gear oil?

I believe the transfer case uses pure hydraulics to limit the slip and transfer torque front to rear. TC just pumps oil - no wearing parts. The rear diff is a wet-clutch plate type of LSD so it'd need the additives?

I believe the transfer case uses pure hydraulics to limit the slip and transfer torque front to rear. TC just pumps oil - no wearing parts. The rear diff is a wet-clutch plate type of LSD so it'd need the additives?

munkeymanz, where do you get this info from? You've previously posted this apparent disinformation without justifcation.

As I posted here:
http://www.aussiemagna.com/forums/showthread.php?t=99299&page=3

The shop manual indicates otherwise.

It is called Diaqueen.......I would recommend the additive Mits use in the diff but it certainly is not cheap

There doesn't seem to be any mention of the additive in the workshop/owner's manual regarding the use of the additive in the rear diff. Do you find that the additive improves wear, noise, operation, etc of the rear diff Mal?

Thanks

I've always used the friction modifier additive in mine since being told to by a very experienced evo mechanic. You don't have to but it apparently helps. 230k and still silent. Our owner manuals don't mention it.

Hmm, its time to changeover the oils again (based on my aggressive schedule of 20,000 k's). Thats the TC and rear diff.

I'm thinking of going with the Mits Diaqueen which i believe is a hypoid gear oil GL5 SAE090 - can anyone who knows tell me the exact product name?
Is it correct that its a single viscosity rating - 90?
And GL5 is the grade required?

Whats the recommendation re the friction modifier, is it necessary with the Diaqueen for the rear diff?

Diaqueen is a little problematic, as its expensive and not all the dealers stock it. Even if they do getting the exact viscosity/grade ratings for what they have on hand is not easy. Its mostly for EVO Lancers and i think the Lancer has a different viscosity rating requirement than SAE90.

Penrite have a product (http://www.penriteoil.com.au/products.php?id_categ=4&id_products=376) that is fully synthetic and meets GL5 SAE90 (and 80W-90). Anyone used this?

Also, after a bit of research I dont see any benefit to using a friction modifier additive.
Also, in my travels i read that Viscous LSD's, which is what we have, may have a limited life of around 100,000 k's due to breakdown of the silicone fluid in the diff. Still works as a regular diff tho.

Hmm, its time to changeover the oils again (based on my aggressive schedule of 20,000 k's). Thats the TC and rear diff.

Does anyone else change their TC and rear diff oil that regularly?
There is no recommended interval for these listed in my service book, though I thought it was 45 000 km. Other thoughts?
(I have done 29 000 km since these were changed last time and I'm wondering if it needs to be done in my service this week. I'll have another chance to change them in the next 10 000 km.)

Does anyone else change their TC and rear diff oil that regularly?
There is no recommended interval for these listed in my service book, though I thought it was 45 000 km. Other thoughts?
(I have done 29 000 km since these were changed last time and I'm wondering if it needs to be done in my service this week. I'll have another chance to change them in the next 10 000 km.)
While we're waiting for responses, i should clarify that my aggressive schedule is aimed at the ATF, which i mention somewhere else, but i've decided to get the TC and diff done at the same time just for extra peace of mind while the cars in there. Objectively, its probably way overkill on those, but i dont mind getting it done as the expense is not that great. Yeah, i read 45 somewhere as well, probably service book.

I see Penrite make fluids for the AWD drive train. What are your views on these. Also views on Penrite coolant and ATF? i have stopped using Mitsubishi coolant since they stopped selling concentrate.

I see Penrite make fluids for the AWD drive train. What are your views on these. Also views on Penrite coolant and ATF? i have stopped using Mitsubishi coolant since they stopped selling concentrate.

Not sure I want to start the "which oil is best" thread.

What I have read about viscous couplings is that the two biggest killers are - heat and seal failure.

Which tells me the oil used in the diff/TC needs to be the right oil. Both to regulate heat and prevent seal deterioration.

What I have read about viscous couplings is that the two biggest killers are - heat and seal failure.
Regarding seal failure, i'm wondering about the risks if the LSD oil has additional friction modifiers. Our diff doesnt need them because its a sealed VCU.
I'm also considering full synthetic rather than mineral based for longevity and the improved shock protection.

The Penrite product (http://www.penriteoil.com.au/products.php?id_categ=4&id_products=376) i linked to earlier seems to fit the bill, but no one here seems to have tried it.

Actually, based on my own research, most if not all the "LSD" oils seem to have friction modifiers added.
I think thats really a potential problem for us. I'm not sure what brand of hypoid GL5 gear oil the dealers use and if that has friction modifiers in it, would like to find out.

hi, just got a 2003 AWD magna with about 70000km on the clock. as will all cars I purchase I dump the oils and start from scratch, as I never trust previous users

being my 1st awd magna and no local dealer within 500km of me I will be using auto1 and repco to get my oils. I want to replace all oils in the car starting with gearbox and diffs. seeing as misti isn't close enough to get oils I will be relying on other brands. can anybody recommend oils for these areas of the car that's are proven performers.

many thanks

Mobil 1 75/90 SHC has been fine for me so far, @ 250,000 kms, rear diff and TC.

Mits SP3 in the gearbox, and Mobil 1 5/50 in the engine.

Mobil 1 75/90 SHC has been fine for me so far, @ 250,000 kms, rear diff and TC.

Mits SP3 in the gearbox, and Mobil 1 5/50 in the engine.

thanks mate, any other options for the gearbox as I cannot get mits lubes for a long amount of time due to the remote nature of where I live.