Transmission help
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This is a discussion on Transmission help within the Transmission & AWD forums, part of the Tech & Modifying & General Repairs category; I have a 02 wrx and the tranny blew and I just bought a 03 wrx trans from my work ...

  1. #1
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    Transmission help

    I have a 02 wrx and the tranny blew and I just bought a 03 wrx trans from my work . Do I need to get the diff and axles out of the 03 or will mine work ?!

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  3. #2
    He simply abides. SD_GR's Avatar
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    There was a gender change around that time on the front axles. It's safest to look and make sure. In any case check the codes, they're not just in the gearbox but also on a plaque on the fender.
    WRX Info Links, Courtesy TheJ
    Man is a brute.... If you're cruel to him, he respects and fears you. If you're kind to him, he plucks your eyes out. Alexis Zorbas
    I lied. I cheated. I bribed men to cover the crimes of other men. I am an accessory to murder. But the most damning thing of all... I think I can live with it. And if I had to do it all over again - I would. Benjamin Sisko
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    Well I can't check the fender on the 03 cause it's already gone . Do u have any info on the diff ?

  5. #4
    He simply abides. SD_GR's Avatar
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    The rear diff?

    The output ratio of the gearbox will determine which rear diff you will need. There were changes but I don't believe they happened during those years (if you are dealing with a US model donor and receiver car).

    Transmission FAQ: Read if you are thinking of upgrading! - Subaru WRX Forum

    http://forums.nasioc.com/forums/showthread.php?t=665334

    WRX tranny compatibility? 02 03 04 05....
    WRX Info Links, Courtesy TheJ
    Man is a brute.... If you're cruel to him, he respects and fears you. If you're kind to him, he plucks your eyes out. Alexis Zorbas
    I lied. I cheated. I bribed men to cover the crimes of other men. I am an accessory to murder. But the most damning thing of all... I think I can live with it. And if I had to do it all over again - I would. Benjamin Sisko
    DISCLAIMER: Opinions expressed are the author's alone and are inherently worthless.

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    How do I figure out the output ratio ? I pulled my rear diff as well and it says 3.79 on the ring and pinion ... I thought 02-05 is 3.54 ..!?

  7. #6
    He simply abides. SD_GR's Avatar
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    Check the gearbox code and year of the source car; sites have charts.
    WRX Info Links, Courtesy TheJ
    Man is a brute.... If you're cruel to him, he respects and fears you. If you're kind to him, he plucks your eyes out. Alexis Zorbas
    I lied. I cheated. I bribed men to cover the crimes of other men. I am an accessory to murder. But the most damning thing of all... I think I can live with it. And if I had to do it all over again - I would. Benjamin Sisko
    DISCLAIMER: Opinions expressed are the author's alone and are inherently worthless.

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