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Old 02-21-2011, 12:38 PM   #1
FuJi K
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Default It aint gon fall apart no more; Welded cir-clip phase2 centre diff

Here is a center diff taken out of a WRX tranny fitted with PPG straight cuts. I was doing the tranny swap because his OEM WRX tranny blew 3rd gear. The setup is a '02 WRX, TD05H 18G 7cm, EWG, E85, EJ257 shortblock swap.

As some of you may know, the center diff LOVES to fall apart. I have seen this in a '00 2.5RS, '00 Outback, and '03 WRX. To service the center diff you have to replace it. Subaru doesn't sell rebuild kits for the center diff. It's a sealed unit. Well.... then might as well weld the cir-clip that holds it together so you don't have to worry about it coming off ever again.



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Old 02-21-2011, 06:21 PM   #2
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Holy cow, never knew center diffs were known for coming apart.

At the very least, those welds will make sure no human ever catches a whiff of the horrid stench contained in that thing!
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Old 02-22-2011, 12:31 PM   #3
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Quote:
Originally Posted by FuJi K View Post
To service the center diff you have to replace it. Subaru doesn't sell rebuild kits for the center diff. It's a sealed unit. Well.... then might as well weld the cir-clip that holds it together so you don't have to worry about it coming off ever again.
This is sound logic. Kudos.
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Old 02-22-2011, 04:00 PM   #4
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how would this effect on road handling?
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Old 02-22-2011, 04:05 PM   #5
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not sure if this is a dumb question or not, but will this mess up the balance? I think I would have paid someone a few bucks to just put a few short tig weld beads instead.
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Old 02-22-2011, 04:34 PM   #6
FuJi K
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not sure if this is a dumb question or not, but will this mess up the balance? I think I would have paid someone a few bucks to just put a few short tig weld beads instead.
If I had a TIG welder, that's what I would have done.

We'll find out in the long run. This is why I welded both sides... I know a little off...
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Old 02-22-2011, 06:04 PM   #7
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Only question I would have is how the VC juice liked that heat.. Since it is the heat created by friction that drives it towards the semi-solid state - I wonder how extreme heat could potentially damage it.
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Old 02-22-2011, 06:22 PM   #8
FuJi K
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This is how the GUTS look like if you where to take one apart.
This center diff was taken apart, gutted and used as an OPEN diff for a hybrid final drive setup; 3.900tranny and 4.444 rear diff.








Last edited by FuJi K; 02-22-2011 at 07:39 PM.
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Old 02-22-2011, 07:13 PM   #9
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So - by these pictures, you're saying you opened it up - drained the VC's "fluid" and put it back together dry? Thats kind of like letting the magic smoke out.. It's not going to work anymore.....


And this is what I'm talking about..

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Originally Posted by FuJi K View Post
Those plates are extremely thin - the fluid that is trapped in there, directly next to the weld is heat sensitive - and the O-ring is right there as well..

The VC has to remain sealed with its fluid intact in order to work....
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Old 02-22-2011, 07:32 PM   #10
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sorry I didn't describe anything....


but that's how it looks like INSIDE the VLSD center diff. The one with the welded c-clip was NOT taken apart.
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Old 02-22-2011, 07:37 PM   #11
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Gotcha!
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Old 11-18-2013, 12:15 AM   #12
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Bump...

Lookie what I found today.



Had no idea this was semi-common?

Can I buy a new circlip from Subaru?
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Old 11-18-2013, 05:53 AM   #13
FuJi K
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Buy a new center diff. You'll enjoy a fresh VLSD with a happy c-clip.


http://forums.nasioc.com/forums/show....php?t=2432712

Last edited by FuJi K; 11-18-2013 at 06:04 AM.
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Old 11-18-2013, 09:06 AM   #14
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Oof, that ain't in the budget. May try welding with or without the ring first...
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Old 03-16-2014, 06:08 PM   #15
FuJi K
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Weld it, problem solved. Broken? Buy a new one.
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Old 03-18-2014, 04:05 AM   #16
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Bought a 2001 outback 5 spd 4.11 tranny last year, found the thread about this cir clip getting itchy feet and decided to look at the center diff in my replacement tranny. Both rings were in place, but had a local shop put 3 small tigs at equal lengths apart from each other on the inside part of the rings. Not going ANY where now...

Not that much work to do it right the first time around though other than a bunch of cleaning...
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Old 06-21-2014, 12:26 PM   #17
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Fuji, how did you get the diff all the way apart?
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Old 06-22-2014, 09:46 AM   #18
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By the looks of it he didn't actually take it apart. It's a pic from some other opened up diff.
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Old 06-24-2014, 02:04 PM   #19
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Oh, i see. Well if anyone has managed to get one apart themselves id love to know how, but i dont see it happening without some kind of press.
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Old 06-26-2014, 11:03 PM   #20
FuJi K
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Quote:
Originally Posted by bluewrx21 View Post
Oh, i see. Well if anyone has managed to get one apart themselves id love to know how, but i dont see it happening without some kind of press.
give it a couple of wacks
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Old 06-27-2014, 12:43 AM   #21
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give it a couple of wacks
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