Center Diff install complete!!: WHINE FOUND!: NOW WHINING!

entirelyturbo · Post by **entirelyturbo** » Fri Sep 04, 2009 3:38 am

Just one more thing to check...

... you haven't done any movie shoots recently right?

If so, I hope you didn't roll it over.

Subarus are known for their driveshafts falling out when the car rolls over.

skoobywrx · Post by **skoobywrx** » Fri Sep 04, 2009 5:20 am

lol.....no i havent.....

so you think if replace the center diff....this will correct the issue?

is it easy swap the center diff while the tranny in the car?

how can i tell if the center diff is shot when it is out of the car? and if a new one i get is good?

Soul Shinobi · Post by **Soul Shinobi** » Fri Sep 04, 2009 5:41 am

There's a method for testing the center diff on the car, I'm surprised no one brought it up yet (maybe we just thought you'd procrastinate getting a driveshaft in

).

I'll be honest I'm not 100% sure what the procedure is. I think you have to lift one end of the car and keep one end's wheels on the ground, then try to rotate both tires in the air in the same direction (friend required). I don't remember what the result are supposed to be exactly. For you, I expect it to bind and not turn, but I don't know to what degree this is acceptable.

Someone finish/correct this for me here.

skoobywrx · Post by **skoobywrx** » Fri Sep 04, 2009 6:50 am

while the car is on?? im so confuscious!

thanks guys for all your help! i need to work on this issue and the clutch slave cylinder and the car is ready for my wife for her school year.

is it easy to get off of the car, while the tranny is still on the car?

entirelyturbo · Post by **entirelyturbo** » Fri Sep 04, 2009 1:24 pm

It can be done with the trans in the car. I haven't done one, but you just have to take the rear transfer case off.

fishbone79 · Post by **fishbone79** » Fri Sep 04, 2009 2:40 pm

Yes, there is a way to test it in the car, and I thought it had been posted previously on this forum, but I can't seem to find it... I'm a little fuzzy on the details too, but I believe it's something like rotate rear tires in the same direction as soul shinobi says, and watch for jumpyness or some other qualitative thing.

The diff can be swapped in the car. I have one that I have no need for, but I need confirmation that the center diff in the NA MT is the same as the turbo MT. I think they are, but I am not positive... anyone?

skoobywrx · Post by **skoobywrx** » Fri Sep 04, 2009 2:44 pm

from this thread:
http://bbs.legacycentral.org/viewtopic. ... entre+diff

theres only 2 types, phase I and phase II they different and only by years.
91-98 and 99+

are you in WA or another state?

fishbone79 · Post by **fishbone79** » Fri Sep 04, 2009 3:03 pm

I'm in NJ, haha. USPS priority flat rate box is ~$9 in that size, i think. I will dig the thing out and make sure its visually OK. The transmission it was removed from was working fine, I just wanted a few parts off the mainshaft for a rebuild I was doing. If it doesn't work, just let me know and I'll send your $ back, NQA.

n2x4 · Post by **n2x4** » Fri Sep 04, 2009 8:57 pm

A few things I'll add-

Driveshaft lengths are not dependant upon the model of the car (Impreza vs. Legacy). There are only two different length driveshafts. (length aside, there are other differences but that doesn't matter at this point).

Long - 5MT
Short - Auto/6MT

Center Diff replacement isn't too bad and can be done with the trans in the car. Skoobywrx posted the link to my How-To. It should explain everything.

Still pretty weird that half of the driveshaft was removed...

skoobywrx · Post by **skoobywrx** » Sat Sep 05, 2009 4:20 am

got a tranny time for the center swap

got it for a good deal! free!!! FTW

skoobywrx · Post by **skoobywrx** » Sun Sep 06, 2009 5:27 am

got the center diff removed today, after a day of autoX....so tired:

what is this junk?

not metal shavings looks like greasey rat poop!

Soul Shinobi · Post by **Soul Shinobi** » Sun Sep 06, 2009 5:30 am

The hell... Maybe it's the viscous fluid from the viscous coupling unit that bled out during extreme overheating? Just a guess.

fishbone79 · Post by **fishbone79** » Sun Sep 06, 2009 3:13 pm

That looks like the crap that came out of the center diff I replaced a few years ago. Is the actual viscous coupling purple or anything?

skoobywrx · Post by **skoobywrx** » Sun Sep 06, 2009 4:54 pm

this is the one that came out of the replacement tranny that i got. not the one that came out of the car. how can i tell if its good or not? i spin the gears with my fingers and i dont feel anything binding or anything like that......hmm

should i find another? of just test this one out?

ericem · Post by **ericem** » Sun Sep 06, 2009 5:13 pm

Test this one out. The oil balls can just be tranny oil slugging up.

skoobywrx · Post by **skoobywrx** » Sun Sep 06, 2009 5:35 pm

oh, another thing...this tranny has been out of a car for quite some time so the tranny oil is old......maybe its just the ouul crappy oil

skoobywrx · Post by **skoobywrx** » Mon Sep 07, 2009 4:01 am

got the new installed.....too bad light and my energy ran out.....

will finish and test out tommorrow.

skoobywrx · Post by **skoobywrx** » Mon Sep 07, 2009 4:13 am

question: per the parts list do I leave the #35 part off?

doesnt seem right....

n2x4 · Post by **n2x4** » Mon Sep 07, 2009 6:24 am

34 is a washer and 35 is a bearing. I think it all depends if the old bearing and washer are still afixed to the other part of the gearset (#2).

skoobywrx · Post by **skoobywrx** » Mon Sep 07, 2009 3:00 pm

n2x4 wrote:34 is a washer and 35 is a bearing. I think it all depends if the old bearing and washer are still afixed to the other part of the gearset (#2).

makes sense now....thanks

skoobywrx · Post by **skoobywrx** » Mon Sep 07, 2009 9:12 pm

ok definately not with the bearing.....tried it with the bearing and some nasty sounds coming from it. trying it with the just the washer....hope it works!

skoobywrx · Post by **skoobywrx** » Mon Sep 07, 2009 11:04 pm

installed it sans #35, since mine didnt have it installed...used the same #34 washer......
test drove it, did some cirlces both directions....seems fine.....
but now i get a while?!

n2x4 · Post by **n2x4** » Tue Sep 08, 2009 1:58 am

A whine? I'd doublecheck the meshing of the transfer gears. They might not be together correctly.

Maybe that's another reason the driveshaft was removed?

fishbone79 · Post by **fishbone79** » Tue Sep 08, 2009 3:51 am

How bad/where is the whine?

skoobywrx · Post by **skoobywrx** » Tue Sep 08, 2009 5:43 am

whine seems to coming from underneath the car....im assuming the transmisson. i cant pinpoint the area right now.

one observation: the sound increases in pitch as the the speed goes up. no change in sound or pitch if a gear changes. even at neutral coasting the sound is there.

sounds like if the car is on a dyno......like a really loud tires...increase in pitch and sound as you go faster....WTF?!

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Center Diff install complete!!: WHINE FOUND!: NOW WHINING!