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Old 01-07-2003, 11:47 AM   #1
mykrrrr
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Question Tranny/Diff Fluid Question

I've currently got Redline in both the tranny and rear diff of my RS. I'm thinking while it's a pseudo-Spring outside I might as well change it when I'm doing my oil today.

I don't have time to head up to Lybarger to get more Redline so I was wondering what's a decent sub for Redline???

Is Mobil 1 any good???

thx. for the advice.

-mykr.
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Old 01-07-2003, 12:49 PM   #2
WRXpkr
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I personally reccomend whatever subaru uses stock...
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Old 01-07-2003, 01:13 PM   #3
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I agree, use what Subaru recommends.
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Old 01-07-2003, 01:26 PM   #4
mykrrrr
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Unhappy

Well...that would make me go up to Mid-City to get some now since that's the closest dealer...dammit I was just up that way yesterday.

-mykr.
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Old 01-07-2003, 01:44 PM   #5
whitewag
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you can get the trans/diff fluid at Pep Boys, AutoZone etc. SoS uses Valvoline brand. Just make sure the weight is correct
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Old 01-07-2003, 01:51 PM   #6
JayGold
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Default Re: Tranny/Diff Fluid Question

Quote:
Originally posted by mykrrrr
Is Mobil 1 any good???

-mykr.

Having recently drained out my +15,000 miles of used Mobil 1 tranny fluid, flushing and replacing with Redline, I personally would not use the Mobil again.
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Old 01-07-2003, 02:32 PM   #7
epsilon
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Based on Karl's (WRB_WRX) recommendation, I'm using a 1:2 mix of Redline MT-90 and 75W90NS in the tranny and straight 75W90NS in the rear diff. Works real well for me. I got it from Lybarger. He gave me a $.95/quart discount, without me even asking for it (ended up paying $7/qt). I got a little extra, in order to flush the tranny first.
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Old 01-07-2003, 03:18 PM   #8
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Where/who is Lybarger. I'm gonna do that flush/change with Karl real soon and I'm gonna go stock up on that stuff real soon. . .

WRXemALL
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Old 01-07-2003, 04:36 PM   #9
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my issue with mobil 1 is my syncros don't always seem to work so nice... it is a lot better feeling though once you're in gear than the stock gear oil... next time i'm going to try that redline 75w90NS stuff...
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Old 01-07-2003, 05:15 PM   #10
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Stick with the same weight of Redline you have in the car now. It will help flush out any of the old tranny fluid still left.

I'm on my third drain and fill on Redline 75w90NS in the tranny and 75w90 in the diff.

Shifting is smooth.
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Old 01-07-2003, 05:59 PM   #11
epsilon
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Quote:
Originally posted by WRXemALL
Where/who is Lybarger. I'm gonna do that flush/change with Karl real soon and I'm gonna go stock up on that stuff real soon. . .
Lybarger Racing Enterprises
4424 S. Hi-Point Rd.
McHenry, IL 60050
(815) 363-8560

Good people. I got 3 qts MT-90 and 5 qts 75W90NS.
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Old 01-07-2003, 07:11 PM   #12
WRXpkr
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I wont go into how badly i thought that redline was, i didnt do a thurough flush, theres gotta be some way to do it without wasting a ton of cash on spent fluids... anyway, carl raves about his mix, i dont wanna spend the cash to find out if it works or not.
When i had my 30k mile checkup done, they put it whatever it is they put in, and it was instantly better. right now, ive got another 6k miles on the subaru (mobil1?) stuff, and im still happy as a creampuff forgotten behind a box of grapenuts by anna nicole.
it was around 10k to 15k that i started feeling problems with the redline. If Jay got 15 out of his, id say thats not so bad...

LRE is a great little shop, he asked if i could split a drum of cam2 purple with him and if i had a place to keep it... i wish i did... he also likes the wrx, im not sure how he feels now, its been about 9 months since i was in there and there are alot of jerky wrx owners out there... He ended up buying a focus for autoXing because it was cheaper...
Again, great guy, nice little shop.
Trent
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Old 01-07-2003, 09:02 PM   #13
JayGold
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Quote:
Originally posted by travmn
my issue with mobil 1 is my syncros don't always seem to work so nice... it is a lot better feeling though once you're in gear than the stock gear oil... next time i'm going to try that redline 75w90NS stuff...
This is the same issue I had with the Mobil. Gripes with 1st and second gear engagement, rough 4th gear also.

From 5,000mi. to around 17,000mi. I used Mobil 1 in the tranny.

17,000mi. on I have used Redline MT-90 in the tranny and 75W90NS in the rear diff. So far I have 7,000mi. on the Redline.
I was 100% more satisfied with the Redline over the Mobil 1. Even with the colder weather we have been seeing, I have yet to hear/feel any degrading performance in shifter smoothness, gear engagement, and tranny gear noise (ya know that 1st gear wine?)

Jay
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Old 01-08-2003, 12:53 AM   #14
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btw, doesn't the MT-90 not meet the minimum grade recommended by subaru for gear oil??? I can't recall what the grade was off hand, but i'm pretty sure the 75w90NS did meet it. I honestly don't know if it would have any real detrimental effects using it though... especially since it seems to be popular here... now if only there was somewhere to get redline cheap...
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Old 01-08-2003, 01:39 AM   #15
Section 8
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Mobile one is poor because it lubricates to well for sportier driving. THe syncros do not work as well as they should. The Redline oil without the friction modifiers will have the same problems. THe NS solves this problem (read the bottle)

Or you could get the ultimate in shift speed and gear protection and install a 9.5 pound flywheel with Redline shockproof gear oil. I probably lost milage with this oil though, pouring it out of the bottle you can see it is quite different, it has surface tension that is unbelieveable, I could see it degrading fuel effeciency during cruise.

Read the bottle, you don't want something that lubricates better if you are concerned about drive dogs clashing, you need less lubrication for the syncronizers to work better.

If you are not having any problems, just get the regular Subaru stuff. There is no point in upgrading unless you do it intelegently and for a reason.

cheeRS,

Greg
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Old 01-08-2003, 07:26 AM   #16
WRXpkr
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I was using the NS stuff when i had my syncro problems...
Really, i see it as your choice, and i yhink every trans has been broken in differently under different situations. Im not sure everyones experiances would be common to you, or repeatable even...
i really dont know
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Old 01-08-2003, 08:25 AM   #17
mykrrrr
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I went to Mid City and the guy tried to sell me ATF fluid. I told him I've got a 5 spd. and he said "oh we're out."

I went to Murray's...nothing. Then off to Pep Boys where I got 75w90 dino tranny fluid by Sta-Lube.

Fluid exchange went quick and there's no grinding or anything weird so far.

-mykr.
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Old 01-08-2003, 09:04 AM   #18
Revision
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My reason to go to synthetic tranny fluid was for better cold weather shifting.
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Old 01-08-2003, 09:05 AM   #19
Section 8
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Quote:
Originally posted by WRXpkr
I was using the NS stuff when i had my syncro problems...
Really, i see it as your choice, and i yhink every trans has been broken in differently under different situations. Im not sure everyones experiances would be common to you, or repeatable even...
i really dont know
NS isn't the one with the friction additives. I had it backwards.

cheeRS,

Greg

MTL This oil is too low of a viscosity to be used in the Subaru AWD manual transmission. Not Recommended.

MT-90 Great balance of friction and lubrication. This is a good choice for a street/auto-x car. Highly Recommended.

75W90 A GL-5+ grade oil which has a friction modifier and is more suited for a mechanical limited rear end instead of the transmission. If you want friction in the transmission, use the MT-90.

75W90NS Another GL-5+ oil which offers good lubrication and bearing life. Best for the rear diff but can be used in the transmission.

Shockproof Expensive but a good oil for those who are abuse to the transmission/rear end and/or do quite a bit of racing. Use the SuperLight rated oil. Not a requirement for everyone but good stuff nonetheless.
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Old 01-08-2003, 09:12 AM   #20
Section 8
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Oh, and if your syncros are going south, a oil that is thicker/provides more friction for the syncros, will only help for a short while. A friend was having 3rd gear syncro clash. We put the Shockproof in it and it went away for a while but made its way back.

So if you already have genuine "problems" with a syncronizer (and not just an occasional clash, I don't know how you would tell the difference until it gets worse), nothing may "cure" it, save replacement.

cheeRS,

Greg
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