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Old 10-05-2012, 04:31 PM   #1
AgentJ17
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3-cyl conversion...

Default 04 STi transmission diff cover removal

Changing the seals on my early 04 STi transmission. I understand the diff covers thread into the case, but I can't move the b*stard. I also understand that these set the lash on the diff, so I am doing one side at a time and have marked the location of the diff cover.

Any tips on how to remove the cover without damaging it? (Further, that is)
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Old 10-05-2012, 05:11 PM   #2
AgentJ17
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AKA Diff retainer.

Realize I just need a tool to do it. Anyone have success making their own or is the subaru tool cheap enough? I have a feeling I'll hae a tough time tracking one down.
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Old 10-05-2012, 06:44 PM   #3
JarHarms
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Subaru name "side retainers" also commonly called sun dials. Marking them is required but also make sure to count the turns as well.
If you are careful you can use a blunt punch on the tabs and tap with a hammer. If you are going to do this I would stick to the thicker tabs since they are less likely to break off. It is better to have the special tool but there are two sizes on the 6MT which I think requires two separate tools. Or you can make a tool from scrap steel and/or an oil filter wrench. Lube the threads and sealing o-rings with oil when going back on, those add quite a bit of turning resistance.

I also suggest if this is an early 2004 with the internal seals (which I suspect) why not convert to the later retainers that you can change the axle seals externally? (i.e. without removing the retainers.)
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Old 10-06-2012, 04:41 PM   #4
AgentJ17
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Yeah, i gathered the bit about counting the turns.
Can't find the part number on either subarugenuineparts or opposedforces for the side retainers, newer or older.

Thanks for the tips!
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Old 10-07-2012, 05:24 PM   #5
JarHarms
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There is a thread in here that lists both early and late side retainer and axle seal p/n's. Search around and you will find it. Sometimes you can find used side retainers in the FS threads.
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Old 10-07-2012, 06:29 PM   #6
EROCS04SBRUSTI
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exactly I removed them the way explained and replaced the internal seals with a socket tapped in,make sure you count the rotations and mark it also,write it down,you mess that up you have to redial in the backlash.
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