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Old 09-17-2007, 10:47 PM   #1
325boi
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Default tranny and lsd oil question

im going to do change my tranny oil, i have been searching and the best meens to be motul gear 300 and use subaru lsd for the diff. this is correct right? also im a bit confused.... is it called just motul 300 or motul 300 75w-90 or something else.....?

is it in here... going to buy it at a local speed shop but just want to make sure i get the right one...
http://www.motorspotstore.com/gearboxfluids.html

i have a 04 sti
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Old 09-17-2007, 10:57 PM   #2
UkNuck
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'Gear 300' is the full synth, afaik it's only available in a single viscosity range so you can't get the wrong one

'Motylgear 75W-90' is semi-synth
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Old 09-17-2007, 11:10 PM   #3
ryanwrxduksa
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can you let us know how you like it?
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Old 09-17-2007, 11:38 PM   #4
325boi
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^ sure... i got the car with 9k on it and it would shift like butter, now has 30k and have track it a few time. shifthing is not bad but not like when i frist got it. will let you guys know what i think about it.....

so which one should i get.... gear 300 or motygear 75W-90.....?

edit: that link that is say that gear 300 is Semi-Synthetic and motygear is full syn....
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Old 09-18-2007, 07:45 AM   #5
bluesubie
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Quote:
Originally Posted by 325boi View Post
edit: that link that is say that gear 300 is Semi-Synthetic and motygear is full syn....
It's wrong. Click on the link for technical information to open the pdf.

http://www.motorspot.com/Gear_300_Auto_3178_(GB).pdf

-Dennis
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Old 09-18-2007, 12:37 PM   #6
325boi
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^ thanks.....
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Old 09-18-2007, 12:40 PM   #7
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man I opened this thread thinking something else.

if you had a 5spd I would say try scotties cocktail, but nevermind.

Sorry don't know much on the STi trannies. I need to learn considering im going to be putting one in.
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Old 09-18-2007, 08:32 PM   #8
325boi
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whent to the local subaru dealer right now and they told me that they dont carry lsd diff oil. were can i find it? or is there something tha is the same thing?

Last edited by 325boi; 09-19-2007 at 02:21 AM.
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Old 09-18-2007, 09:21 PM   #9
bluesubie
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If you want to use Motul, use the 90 PA Limited-Slip Differential for an STi. It's a conventional diff oil, but you probably won't notice the difference anyway.

-Dennis
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Old 09-19-2007, 02:26 AM   #10
325boi
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i was by super autobacs and got 5 qt. motul 300 for 75 bucks..... i will put in tomorrow and let you guys know what i think.... also still looking for real diff. oil. do i have to change the the tranfer case oil..?
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Old 09-19-2007, 09:13 AM   #11
bluesubie
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The oil that I posted above is a Motul oil for the rear diff and it's real.

-Dennis
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Old 09-19-2007, 10:59 AM   #12
vinithing
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Just got Motul 300 in the tranny. It's AWESOME!
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Old 09-19-2007, 11:08 PM   #13
325boi
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did the tranny oil change today and i didnt see any difference from what my tranny felt before i did the change..... also only 3 full qt. whent in fine and only 3/4 of the 4th qt whent in. it also whent pass the full line.

question: should i take some out or will it be fine? thanks
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Old 09-20-2007, 09:03 AM   #14
bluesubie
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I would take some out. In my experience, too much fluid caused the synchro action to be slower. Try to get something to remove it from the filler tube so it won't be as messy. I used a bottle pump (an idea I got from scoobymods for filling the rear diff) connected to a long plastic tube.

I used Gear 300 and thought it was ok, but not as good as I expected.

-Dennis
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Old 09-20-2007, 11:16 AM   #15
325boi
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^ ya same here maybe i expected to much....? ill take some out right now
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