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Old 01-27-2008, 06:43 PM   #1
MeanEditor
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Default WTB 3.9 rear diff

I need a rear diff with a 3.9:1 ratio. Anything from a 95-98 Impreza or 2005 base model 2.5RS or even a 2006+ WRX should work. Open or LSD, it does not matter, it just needs to be a 3.9. Drop me a line here or at [email protected]. Thanks.

Travis
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Old 01-27-2008, 09:16 PM   #2
Adam West
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Travis, sent you mail.
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Old 01-28-2008, 12:11 AM   #3
MeanEditor
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THanks, replied
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Old 01-28-2008, 01:03 PM   #4
ImprezaSti'd
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Email Sent...
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Old 01-28-2008, 01:16 PM   #5
yzracer758
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What's the ratio in a 2000 2.5RS Automatic tranny diff? I got one if it will work.

-Jeremy
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Old 01-28-2008, 06:59 PM   #6
geddesk2
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isn't 06+ 3.7??

02-05 wrx's have 3.9s correct?
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Old 01-31-2008, 04:00 AM   #7
MeanEditor
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Yeah, 06+ WRX is 3.7... silly me. I still need that 3.9 diff too. YZracer... I will check on the Auto final drive. thanks.
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Old 01-31-2008, 04:43 AM   #8
RoundtheBend
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Quote:
Originally Posted by yzracer758 View Post
What's the ratio in a 2000 2.5RS Automatic tranny diff? I got one if it will work.

-Jeremy
4.44 IIRC
This site says 4.44 also: http://www.wac.addr.com/auto/obs/lsd/lsd.html
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Old 01-31-2008, 09:33 AM   #9
ImprezaSti'd
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I have a 04 sti r180 lsd 3.90? Do you r180 or r160?
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Old 01-31-2008, 05:05 PM   #10
AllWheelsDriven.net
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Hey Travis,

Did you ever find that diff? Have a few 3.9s around..

LMK.

Barrett-
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Old 01-31-2008, 05:18 PM   #11
Dracos
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02-05 WRX Do NOT have 3.90. Is 3.54 I believe. The center dif on a 02-05 WRX is different than the 04 STi, which is why when you upgrade to the 6 speed, you need a new rear end, or to change the final drive on your original.
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