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#3392298 - 06/08/14 03:41 PM Re: Question for Subaru owners [Re: Kiwi_ME]
JTK Online   content

Registered: 08/14/03
Posts: 8172
Loc: Buffalo, NY
I get that somewhat.

Just curious because in the ~3yrs I've been active on Subaru boards I've never heard this talked about.

Still cant figure out how it's fluid is kept separate with the 75w90 gear oil.
2016 Subaru Forester 2.5, CVT. 2013 Dodge Grand Caravan SE (Babe magnet III)

#3392314 - 06/08/14 04:01 PM Re: Question for Subaru owners [Re: JTK]
Rand Offline

Registered: 08/20/03
Posts: 9461
Loc: Barberton,Ohio

10 is center diff
11 is VC
2015 Forester I-Premium 6MT

#3392419 - 06/08/14 06:41 PM Re: Question for Subaru owners [Re: Kiwi_ME]
Rand Offline

Registered: 08/20/03
Posts: 9461
Loc: Barberton,Ohio
+1 this post is correct.

on the auto if the MPT fails you end up with FWD basically.

on the manual if the VC fails you still have 4wd..just can get 1 wheel peel on any of the 4 wheels.

Originally Posted By: Kiwi_ME
Originally Posted By: buster

Right. It's a sealed unit. You can't change the fluid on a VC. The MTF is different.

When the viscous coupling fails, the AWD is essentially gone.

I'm not sure that's technically correct, depending what you mean by "failure." The manual Subaru has a center diff which will work even if the viscous "LSD" feature is diminished. It's actually more like full-time 4WD.

The automatics with their multi-plate clutch are a totally different AWD concept which is similar to just about every FWD-based on-demand AWD vehicle with electronic control, bringing in the rear axle only when useful. Subaru seems to have done a better job however and they are highly-regarded.
2015 Forester I-Premium 6MT

#3393086 - 06/09/14 02:27 PM Re: Question for Subaru owners [Re: buster]
buster Offline

Registered: 11/16/02
Posts: 29731
Loc: NJ
Thank you, that is correct. However, when the VC goes, the torque transfer is gone. For the MT, it's 50/50 with up to 80/20 20/80 transfer with a properly working VC.

#3393136 - 06/09/14 03:26 PM Re: Question for Subaru owners [Re: buster]
Kiwi_ME Offline

Registered: 10/24/08
Posts: 938
Loc: New Zealand
Well, obviously with a component failure something has to change but it's not like it's going to leave you stranded!

#3393310 - 06/09/14 06:52 PM Re: Question for Subaru owners [Re: buster]
LoneRanger Offline

Registered: 07/02/07
Posts: 2101
Loc: Midwest
Someone asked if mine was Manual or Automatic. It's a manual. It's really fun to drive. Using engine braking coming into the entry to a curve then powering through the apex really works well with the this style of AWD Subaru uses in their manual trans. The Nokian WRG2's were a tad squirmy in curves when new but after being scrubbed-in, they handle surprisingly well for such an aggressively siped winter style tread.

The only thing that is a little not perfect is 1st gear ratio is pretty short. I'm shifting to 2nd by the other side of the intersection. But then the short 1st helps for soft road / off road. Although a genuine low range would be best. I think in the Australian market Subaru was offering a low range.

'09 Subaru Forester .......... (Motorcraft Syn Blend 5W30)
'13 Ducati Multistrada 1200 (Spectro Platinum 15W50)

#3394397 - 06/10/14 09:52 PM Re: Question for Subaru owners [Re: buster]
bulwnkl Offline

Registered: 02/09/05
Posts: 1514
Loc: Arizona
Go have a look around at the Ultimate Subaru Message Board. It's a _much_ more helpful place than many of the model-specific boards, because the guys there tend to be more mechanical types, and interesting-project-types, and so forth. There are PLENTY of threads on failed power transfer clutch packs in most of the A/T Subies, and even a few about the potential for the LSD packs in the M/Ts failing.

There isn't any _good_ reason for the LSD pack in one of the M/Ts to fail before the tranny itself. You'd really have to be beating on it, or rallying it, or something of that sort, IMO.
"A government big enough to give you everything you want is a government big enough to take from you everything you have." --Gerald Ford

#3394686 - 06/11/14 09:43 AM Re: Question for Subaru owners [Re: buster]
buster Offline

Registered: 11/16/02
Posts: 29731
Loc: NJ
Thanks bulwnkl!

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