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Discussion Starter #1
I am rebuilding a manual trans. for my 2002 Outback and found that the snap ring had come out of the viscopling. I have reassembled the coupling and will install a heaver snap ring in it but am wondering what fluid do I put in it. Or is trying to repair this even a good idea? Should I just spend the money and install a new one. If so are the ones on e-bay for around $250.00 any good (rebuilt from China) or should I just speed the money and get a new on from Subaru. I plan on keeping the car and am also rebuilding the engine and want everything right.
 

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2001 2.5 RS & 2000 OB
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The center diff is a sealed unit, you can't service it. Why do you think it needs to be replaced? You can also tack weld the new ring in place.
 

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Discussion Starter #3 (Edited)
Yes I thought about tack welding tack welding the cover on. But doesn't it need a fluid of some kind in it before I do that to work properly? The clutch pack in it is sealed with O-rings at each end in order to keep some type of fluid in and lost whatever was in it when the snap ring came out and the cover fell out when I took it out of the gearbox. That's why I need to know what kind fluid it needs to have or if it's better to replace the unit. None of the plates are damaged and I was able to put it all back together. Just need to know what fluid to use or if it's even available or if it's even a good idea to attempt to repair this.
 

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2000 Outback Limited, Dual Range 5 Speed
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+1 yarrgh

Replace new genuine, had the same thing happen to me. But drove mine for a while as I didn’t know what happened. More than likely you will put it together and have torque bind to a degree either now or after the welding.
 

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Discussion Starter #5
+1 yarrgh

Replace new genuine, had the same thing happen to me. But drove mine for a while as I didn’t know what happened. More than likely you will put it together and have torque bind to a degree either now or after the welding.
That's what I'm thinking. I'm an old fart retired ASE master tech and may be to old to redo this in a few years. I'll just spend the money now and do it right.
 

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2000 Outback Limited, Dual Range 5 Speed
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Plus this is a not so common problem with the older viscous couplings (dual layer snap ring), the superseded ones have been changed (single layer thicker snap ring) and apparently don’t have the problem at all.
 

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Outbacks, SVXs, XT6, 4Runner, Celica, Brat, E150s
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If the fluid has come out of it, replace the diff.
 

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'03 Base OBW 5sp; '12 Outback Limited
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I had to do this last summer.
The circlip popped off and was chewed up by the gears so I had to replace the center diff and the long gear together. I purchased a used set from a wrecking yard in NH and transferred over a washer from the original gear and put it all back together and so far no issues. I took the opportunity to replace my shift rod sealing bushing(5sp - Manual) and the shifter knuckle and in 6 months I haven't had any issues. I posted some pics of the damaged pcs on the thread from back then if you're interested in searching.
When I first drained the gear oil it seemed to have a silvery sheen to it which I assume was the silicone fluid from the center diff.
I drained the new gear oil after driving for a few days and then refilled and it's been good since.

I will say there are times I feel like I'm getting a very very slight vibration in my seat when cruising at about 60 mph but I really can't be sure. If so it would be very slight...... I used Permatex anaerobic sealant to mate the rear housing and transmission.

Question: Prior to your circlip failing did you have any tire issues like a flat and either ran on the flat tire for a bit or used the doughnut spare for awhile??? Or have you been running non identical tires for a long time.
I'm wondering b/c my circlip failed a couple weeks after I had a flat....total drive time on the bad tire and doughnut was about 3.5 miles. I've just heard stories about center diffs failing after running with different sized tires.

Good luck with your repair.
 

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Discussion Starter #10
I had to do this last summer.
The circlip popped off and was chewed up by the gears so I had to replace the center diff and the long gear together. I purchased a used set from a wrecking yard in NH and transferred over a washer from the original gear and put it all back together and so far no issues. I took the opportunity to replace my shift rod sealing bushing(5sp - Manual) and the shifter knuckle and in 6 months I haven't had any issues. I posted some pics of the damaged pcs on the thread from back then if you're interested in searching.
When I first drained the gear oil it seemed to have a silvery sheen to it which I assume was the silicone fluid from the center diff.
I drained the new gear oil after driving for a few days and then refilled and it's been good since.

I will say there are times I feel like I'm getting a very very slight vibration in my seat when cruising at about 60 mph but I really can't be sure. If so it would be very slight...... I used Permatex anaerobic sealant to mate the rear housing and transmission.

Question: Prior to your circlip failing did you have any tire issues like a flat and either ran on the flat tire for a bit or used the doughnut spare for awhile??? Or have you been running non identical tires for a long time.
I'm wondering b/c my circlip failed a couple weeks after I had a flat....total drive time on the bad tire and doughnut was about 3.5 miles. I've just heard stories about center diffs failing after running with different sized tires.

Good luck with your repair.
This trans is from a parts car that I bought in order to do a auto trans to a 5 speed swap and they did run many different tires in different states of wear. That's why I went into the trans. I susppected this might be an issue. It was.
 
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