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Old 09-07-2003, 02:32 AM   #1
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Member#: 9093
Join Date: Aug 2001
Location: SF
1995 RHD STi RA Ver2
swap starr

Default 37/9 rear diff = 4.11

hey- i opened up the cover on my rear diff, it says 37/9 = 4.11 ratio. good stuff.

what type of gear oil should i run in the diff? i want it to lock up as much as possible

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Old 09-07-2003, 06:10 PM   #2
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Join Date: Jun 2001
Chapter/Region: NESIC
Location: waltham, ma
.... 122 IggPoints
Work... ahhh... so tired.


I would say NEO or Motul... both have LSD aditives that you can buy. And they will hold up to anything.
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Old 09-08-2003, 01:15 PM   #3
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Chapter/Region: NWIC
Location: Austin, Texas, USA
The 93 W/EJ20K-sold
Subaru-less :(


i have 75/90ns in redline in the rear diff and shockproof light weight in the tranny i have been very happy
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Old 09-08-2003, 08:38 PM   #4
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Location: san francisco, ca
90BJ Legacy LS ABS
AWD 946 Rio Red Jpn built


The fluid you use has nothing to do with the amount of lockup, its a sealed unit.

Adding friction modifiers will only decrease gas milage
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