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01 RScoupe,02WRX
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If the diff you'll be replacing is a 4.11 you should be okay. Don't forget to swap the bearings from the old diff to the new LSD. You can't mix up the bearings and races because they're mated to one another. Pull the bearings off by the race, NOT THE CAGE! I've wrecked bearings doing this. When your done don't forget to check the lash between the ring and pinion.
 

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overdeveloped beater
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...and do not mix up the little shims that are on the sideplates.

Clean everything really well and doublecheck the wear pattern with grease before you put the cover back on for good.

Don't overtorque the sideplate bolts, or you may throw off the backlash.

Take your time....it is the easiest way to add an LSD to an open diff.
 

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overdeveloped beater
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Good advice on rear pumpkins. :)

I had always wondered if Subaru used shims or adjustment nuts.
They actually used both. The T-type uses shims and the VA-type uses a star shaped adjustment nut....just like the front diff. Both are still considered R160s, but not much is cross compatable betweeen the two.
 

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2007 impreza 2.5i
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131 Posts
Discussion Starter · #8 ·
sorry hahaha more info would have helped. Uh its a 98' impreza outback sport. it has 3.90 drivetrain. so is that possible? all I want to do is take the LSD and put it in my diff.
 

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overdeveloped beater
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Yup...exactly the way you should do it. Pull both diffs out of the housings, swap the ring gears, and put the LSD into your OBS housing. While it's always good practice to change the bearing races to keep them with the bearings that originally came with....I've found the Subies to be pretty damn tight on tolerances......tight enough that I've had to make a change in 1 diff out of 6-7 that I've done.

Check things first, change if necessary.
 

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95 L, 96 OUTBACK
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Yup...exactly the way you should do it. Pull both diffs out of the housings, swap the ring gears, and put the LSD into your OBS housing. While it's always good practice to change the bearing races to keep them with the bearings that originally came with....I've found the Subies to be pretty damn tight on tolerances......tight enough that I've had to make a change in 1 diff out of 6-7 that I've done.

Check things first, change if necessary.
Yep I kept my bearings on the carrier. Went just fine.
 
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