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01 Outback H6 VDC, 97 GT wgn w/ ej22, 98 OBW w/ej22
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the 00 - 04 outback manual trans should / does have a 4.11 final drive ratio, not a 3.9. this is true for 96 - 04 outbacks, GTs and foresters.

the legacy manual trans on the other hand does have a 3.9 final drive ratio, 95 - 04. (low end imprezas also.)

it sounds like your front diff does not match your rear diff. with a few minutes of driving the viscous center coupling heats up and lock up the wheels. once it cools you can drive it again.

does it make any noise when it locks up? or does it just slow down and not go?
has the trans or rear diff ever been replaced?

check the trans ID # on the bell housing at the starter and compare it to the ID tag on the driver side strut tower. if the numbers do not match you have found your problem. post the numbers.

you may be able to test the for the mis match by lifting the car off the ground and turning the rear wheel by hand with the trans in gear. mark both the front and rear tires with chalk or tape in the same position and rotate one wheel several times, 2 - 3 times. the tape on the wheels for the front and rear should end up in the same place.

i'm not sure this will work, i do not know how well the center VC grabs when cold. it is a viscous coupling like a Vlsd diff. you probably need all wheels in the air since the outback has a VLSD rear diff. you may be able to improve the test by warming up the VC. turning the front wheel by hand with the emergency brake on may help. or if the car is on jack stands, just run the engine with the hand brake on. the VC will heat up pretty quick.

also if the problem is mis-matched diffs, you should be able to run it with all 4 whaeels in the air forever. no binding. this may be easier. lift the car, put it in gear and start the engine. if it binds and locks up, it is not mis-matched diffs..

auto parts Car-Part.com--Used Auto Parts Market put in your zip and sort by distance.

you can use any outback or forester trans 00 - 04. GTs will work but the speedo will be off a little.

you can also check the diff ratio at http://opposedforces.com/parts the ring and pinion in the rear diff, ''individual'' diff, will list the ratio. you can find the diffs in the ''TRAIN'' section of the parts listing (as in drive train.).

item # 15 in the link below: (car info is listed at the top of the page.body code B12 equals 00 - 04.)

http://opposedforces.com/parts/legacy/us_b12/type_20/train/differential_individual/illustration_2/
 

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Registered
01 Outback H6 VDC, 97 GT wgn w/ ej22, 98 OBW w/ej22
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1,401 Posts
i'm not sure this will work, i do not know how well the center VC grabs when cold. it is a viscous coupling like a Vlsd diff. you probably need all wheels in the air since the outback has a VLSD rear diff.
you may be able to improve the test by warming up the VC. turning the front wheel by hand with the emergency brake on may help. or if the car is on jack stands, just run the engine with the hand brake on. the VC will heat up pretty quick.

also if the problem is mis-matched diffs, you should be able to run it with all 4 whaeels in the air forever. no binding. this may be easier. lift the car, put it in gear and start the engine. if it binds and locks up, it is not mis-matched diffs..
 

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Registered
01 Outback H6 VDC, 97 GT wgn w/ ej22, 98 OBW w/ej22
Joined
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1,401 Posts
I've got a chart of Subaru tranny part numbers and their ratios from hxxp://xxx.northursalia.com/techdocs/trannychart/trannychart.pdf. It shows that a MY01-02 Outback uses TY754VCBCA with a final drive of 3.9. Is this inaccurate?
as nice as that list is, it has been wrong on a few instances. i would not trust it.
but i would trust opposedforces.com .
 

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01 Outback H6 VDC, 97 GT wgn w/ ej22, 98 OBW w/ej22
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you can find a rear diff probably cheaper than a trans.

the 3.9 ratio rear diff was used in 95 - 04 manual trans legacys and low end imprezas. NOT outbacks, GTs Foresters or probably WRX.

you should be able to find one for $75 or less. your speedo will be off, you will be driving faster than the speedo says. but buying smaller tires when you need them will lessen the error.
 
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