viscous diff - Subaru WRX Forum
 
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post #1 of 8 Old 09-14-2007, 08:17 PM Thread Starter
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viscous diff

i was wondering if anyone has installed a new viscous center diff in their wrx mine went in my 02 and i have to put in a new one but i have some questions. first how exactly does the viscous diff work is it sealed with its own fluid or does it work off the tranny fluid or something else. second is the diff just the part with the clutch pack or is it the whole back half of the tranny(which is pretty much shot in my 02) if i get a differential what all is included. this is my first wrx i have only had it a short while so i don't really know what i am doing so any help is very much appreciated.

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post #2 of 8 Old 09-15-2007, 05:28 PM
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Humm.. I can tell you about the rear of front, but I never looked at the center.. I will try and see if I can find some pictures from when I broke my trans down the first time to answer some of your questions.. It works off the transmission fluid. Is is not part of the clutch pack. As far as whats included, that all depends on what you buy and from whom.. Probably just the unit itself..
OK..



2002 Stock WRX transmission..
http://i111.photobucket.com/albums/n...aru/Trans1.jpg

Very Rear (2) section opened up.. The back (2) sections pull off towards the rear as the rest of the case splits in half..
http://i111.photobucket.com/albums/n...u/P7140422.jpg

Complete view of the case opened up.
http://i111.photobucket.com/albums/n...u/P7140428.jpg

What I did to mine..
http://i111.photobucket.com/albums/n...ofP7140429.jpg

you can't see it in the pictures but the center diff is located in the very back section where the drive shaft yoke is located..

02 WRX.. "It's fun when it runs.. Problem is that it hardly ever does..."
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post #3 of 8 Old 09-15-2007, 05:34 PM Thread Starter
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thanks the pictures help some to give me a better understanding of the whole trans but i only took off the very very rear of the transmission just the cap where the shifter arms attach and the driveshaft goes in.

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post #4 of 8 Old 09-15-2007, 05:44 PM
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Yes, that is where the center diff sits.. It is has the splined shaft that the rear driveshafts hooks up to.. I tried but can't find a photo of it. Sorry.

02 WRX.. "It's fun when it runs.. Problem is that it hardly ever does..."
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post #5 of 8 Old 09-15-2007, 05:48 PM
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here is one.. I'm still trying to find more..

http://i111.photobucket.com/albums/n...CenterDiff.jpg

02 WRX.. "It's fun when it runs.. Problem is that it hardly ever does..."
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post #6 of 8 Old 09-18-2007, 09:35 PM Thread Starter
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the pictures are all great but one thing i really need to know is if i buy a subaru center diff does it come completely sealed clutches and fluid already inside

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post #7 of 8 Old 09-18-2007, 10:48 PM
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I would assume that it would be ready to install, but I haven't purchased one.. The only thing I can say is to give the parts department a call and ask.. Might as well upgrade to stronger unit while your at it..

02 WRX.. "It's fun when it runs.. Problem is that it hardly ever does..."
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post #8 of 8 Old 09-19-2007, 09:00 PM Thread Starter
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yeah i was gonna go with the sti one which is stronger and i did call parts they couldn't help without a vin and i didn't have it on me at the time, i am going tomorrow to order the parts. but depending on how much of a price difference there is i might go for a mechanical lsd instead of a stronger viscous.

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