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1994 L Wagon Grey
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Discussion Starter #1
Ok I have heard a million things...90/10 50/50 60/40 and everything in between. Can someone list all the diffrences in the awd splits?
I am looking at more recient L series autos and 5 speeds (ie-96 and above) And also what is my auto 02rs split! is it what I fear? 90/10? Well thanks
 

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From what the salesman told us when Ben bought his 2001 2.5RS

Manual = 50/50
Automatic = 90/10

From what the same salesman told me when I bought my WRX

Manual = 50/50
Automatic = 60/40

I know they've changed the split on the 2002 2.5RS automatic... but I don't know if that's correct. I know the manuals are supposed to be 50/50 regardless of year.
 

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2001 STM Sedan
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the Auto RS's got hte 60/40 split for 02 i thought....but i could very well be wrong, neal call SOA and see what they say.
 

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Emailed SOA

I emailed SOA, and here's their response (my original email is below):

Dear Mr. Lindorff:

Thank you for your inquiry. Yes, the numbers you state in your message are correct. But, these figures are only used as a starting point. They adjust continually based on the where the power is needed. For all of the available information on our various AWD systems, please visit the 'All-Wheel Drive System' section of Subaru.com.

Thanks for the opportunity to be of assistance. Best wishes!!

John J. Mergen
Subaru of America, Inc.
-----------------------------------------------------------
YOUR ORIGINAL MAIL:

Hello! I am curious as to what the Front/Rear power split is for
the 2002 Impreza line. I have heard that the AT RS is 60/40, the AT WRX
is 45/55, and the MT RS and WRX are both 50/50. Are these numbers
correct?

Thanks,
Paul Lindorff
 

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My 99 outback is 90/10 front/rear except in 1st gear and reverse where it is 50/50.

I'd rather it be 50/50 all the time, but the system still works very well. There is an initial understeer push when going into turns, but you can correct this by lifting or tapping the brakes and then getting back on the gas.
 

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overdeveloped beater
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How can that be?

If the center diff (on a MT) is viscous, how can the torque split be 50/50? That would imply that the diff is locked and sending equal amounts to F/R. Sounds wrong to me. As long as we're talking torque splits...what's the deal with this STi diff with a thicker viscous fluid to put more torque to the rear? It may not be an STi unit, it may be a JDM or euro only item. I saw it somewhere but can't remember where.
 

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Hmmmm

I'd always figured that the manuals used a 50/50 torque split during normal driving and distributed power front to back as needed. For example, on a hard take off, it would tranfer more power to the rear because the weight transfer would cause the rear wheels to be the ones with the most grip. The reverse would apply to hard braking, the diff would transfer more power to the front wheels to assist with braking by using the engine like downshifting and the weight would be in the front of the car causing the front wheels to have the most grip. I swear I read this somewhere, perhaps my old Impreza RS brochure. I'll try and dig it up and see what it says to be sure.:run: :run: :cool: :cool:
 
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