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12-10-2002, 02:08 PM | #1 | |||
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Member#: 15543
Join Date: Feb 2002
Vehicle:555 Having a Subaru shop means too many cars |
WRX rear diff ratio automatic? Also Driveshaft length?
So I tried searching 8-9 times with different keywords and I kept getting
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12-11-2002, 12:56 AM | #2 |
Scooby Specialist
Member#: 2953
Join Date: Nov 2000
Chapter/Region:
MWSOC
Location: Rochester, MI, USA
Vehicle:2000 Impreza 2.5RS 2005 Impreza WRX STi |
I am not sure of the rear diff ratio. The final drive of the auto is 4.111. Does the auto WRX drivetrain have a 1.1:1 reduction ratio like the manual or is it 1:1? This would be useful for me to know as well, because I still need a 4.111 rear diff and a driveshaft for my trans swap.
-Wes |
12-11-2002, 01:22 PM | #3 |
Scooby Guru
Member#: 15543
Join Date: Feb 2002
Vehicle:555 Having a Subaru shop means too many cars |
My qeustion is because I plan to use a WRX auto swapped into my legacy. If the search only worked. Maybe I can find a WRX in a parking lot and just hop underneath
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12-11-2002, 01:30 PM | #4 | |
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TXIC
Location: Houston, Tx
Vehicle:1990 Legacy & OB XT AWD 6MT EJ22T AWIC Swap |
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12-11-2002, 04:35 PM | #5 | |
Scooby Specialist
Member#: 2953
Join Date: Nov 2000
Chapter/Region:
MWSOC
Location: Rochester, MI, USA
Vehicle:2000 Impreza 2.5RS 2005 Impreza WRX STi |
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-Wes |
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12-11-2002, 05:41 PM | #6 | |
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Join Date: Feb 2001
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NWIC
Location: Portland, Oregon
Vehicle:WRX H6-3.0 Turbo www.surgelinetuning.com |
Re: WRX rear diff ratio automatic? Also Driveshaft length?
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The manual WRX has a "final drive ratio" of 3.9, but the rear diff itself is actualt 3.54, because the center diff has a 1.1:1 additional ratio. If you take the rear diff apart, you will find 11 teeth on the pinion, and 39 on the gear. ) thus 3.54:1. In the case of swapping in the STI 6 speed, as an example, I had to change the pinion gear in the rear to the 10 tooth version, since the STI doesn't have the 1.1:1 center diff. By driveshaft, do you mean the propeller shaft (shaft going to the rear diff from the center diff). If so, I can measure it when I get home, as I have an extra sitting in the garage. The manual prop shaft is longer than the automatic prop shaft. Jeff |
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12-12-2002, 06:22 AM | #7 | |
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NESIC
Location: Sort of Boston, MA
Vehicle:2008 Acura TL Wicked Black |
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-IggDawg |
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12-12-2002, 01:09 PM | #8 |
Scooby Guru
Member#: 15543
Join Date: Feb 2002
Vehicle:555 Having a Subaru shop means too many cars |
Well I will have a 4.11 or 4.44 LSD that will bolt up, Im just trying to tell if the auto wrx uses the 1.1:1 reduction and what the final diff rate is. I dont think I will need the front half axles though, they both use the pin style right? As long as the spline count is equal....
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12-12-2002, 05:05 PM | #9 |
Scooby Specialist
Member#: 2953
Join Date: Nov 2000
Chapter/Region:
MWSOC
Location: Rochester, MI, USA
Vehicle:2000 Impreza 2.5RS 2005 Impreza WRX STi |
We need the help of a 4EAT WRX owner, so they can do us a favor and jack their car up and count for us.
-Wes |
12-12-2002, 05:09 PM | #10 |
Celebrity Guest Star
Member#: 10648
Join Date: Sep 2001
Chapter/Region:
NESIC
Location: Sort of Boston, MA
Vehicle:2008 Acura TL Wicked Black |
I know they have that mechanical center diff along with the clutch packs. I don't know if it reduces at all tho. I'd also be interested in finding out.
-IggDawg |
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