best replacement for 2002 wrx transmission
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This is a discussion on best replacement for 2002 wrx transmission within the Transmission & AWD forums, part of the Tech & Modifying & General Repairs category; hello, im new to the forum, and to subarus in general. i recently bought my first wrx, a heavily modded ...

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    best replacement for 2002 wrx transmission

    hello, im new to the forum, and to subarus in general. i recently bought my first wrx, a heavily modded 2002 wrx, and i was having problems with my blow off valve releasing too early (around 2000 rpm) so i let a "mechanic" take it for a test drive. somehow this guy completely destroyed second gear in my transmission. my question for everyone is should i put a stock 02 tranny back in or is there a better option? let me know your views. also, if anyone has one for sale for a decent price that would help me greatly as well. thanks.

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    He simply abides. SD_GR's Avatar
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    Quote Originally Posted by DIAMONDSNAKE13 View Post
    my question for everyone is should i put a stock 02 tranny back in or is there a better option?
    My answer is "yes" to both.

    Yes there are "better" options but they can exceed the value of the car at this point; therefore, I'd "simply" put another stock gearbox in. Ideally you'll find one in working order from a car that's been wrapped around a tree etc. for little money. Keep in mind that the more modifications and more lead-footed drivers a car has gone through, the more "expendable" gearboxes become.
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    There are a few options.. as SD eluded to, if you want something heavy duty be prepared to pay. Whether it's worth it to upgrade is up to you.

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    The reason I ask is that I was told a tranny from a 05-07 wrx is a direct fit and a little hardier. Is this true?

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    Quote Originally Posted by DIAMONDSNAKE13 View Post
    The reason I ask is that I was told a tranny from a 05-07 wrx is a direct fit and a little hardier. Is this true?
    Not quite.

    2006-2007 WRX transmission is not a direct bolt-on to your vehicle. Furthermore, the gears are no stronger than the 2003+ variant.

    Your best option is to find a 2003-2005 WRX transmission that contains the more stout gearset.

    2003 had the 1mm wider gears (though be careful: some 2002 had this trans and some 2003 had the older trans)
    2004 improved the 3rd gear synchro stop
    2005 improved the first gear synchros to include dual-ring
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    So a stock 2005 transmission is my best bet. Anyone have a line on one?
    Last edited by zax; 03-27-2014 at 02:28 PM.

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    Quote Originally Posted by DIAMONDSNAKE13 View Post
    So a stock 2005 transmission is my best bet. Anyone have a line on one?
    This will help you immensely:

    http://www.northursalia.com/techdocs...rannychart.pdf

    Honestly, I don't think you'll want to limit yourself to any one year. Remember, the gears in the 2003, 2004, and 2005 transmissions are the same. The strength is the same (though still not great).


    Sorry for editing your post instead of replying (happens from time to time). Hopefully I reverted everything back to what you initially wrote.
    Last edited by zax; 03-27-2014 at 02:47 PM.
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    Also, make sure you know what kind of axles you need. Not all years use the same. And be careful to not mix clutch styles or Final Drive ratios.

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    Quote Originally Posted by wreckingball man View Post
    Also, make sure you know what kind of axles you need. Not all years use the same. And be careful to not mix clutch styles or Final Drive ratios.
    Which is why the OP will stick with the 2003-2005.
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