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This is a discussion on check this out within the VDC, VTC, and 4EAT forums, part of the Transmission & AWD category; A CHEVY TURBO 400 TRANSMISSION IN A WRX!! Well let me start off by saying to all the purist who ...

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    check this out

    A CHEVY TURBO 400 TRANSMISSION IN A WRX!!

    Well let me start off by saying to all the purist who want to trash the idea of a RWD wrx, in no way am I saying that this is the best idea or am I even suggesting someone else try it. All I am doing myself is taking a car that we purchased in the begining to drag race and modifying it accordingly to be the best it can be at drag racing. Let me start off by giving a little background on the car. Well the car is an 03 sonic yellow WRX 4eat. We were running stage 4 with UTEC. I discovered about 6 months ago that the old 4eater was on its last legs. When I did the research on how much it was going to cost to replace it with another 4eat my heart sank. It came in to the tune of around $4000.00 for a built transmission that would not break on me again. I then started thinking about all the drag racing Supras I have read about that had done this same conversion on there cars. I did some quick math and figured I could basically do the conversion for about half the cost of the built 4eat, be twice as strong, have more H.P. at the wheels, and have alot of fun at the same time. A really big influence for me to do this was I had a turbo 400 transmission that was proffesionally built for a built chevy 396. I have searched and searched and could find nothing of someone doing a chevy auto tranny in a wrx before so I was going into this thing kinda blind. I contacted a shop in california that makes custom transmission adapters for old cars and asked him if he could make an adapter to mate a th400 to a wrx motor. After several phone calls and emailing pictures I decided to go for it. So I grabbed the 2.0 wrx short block from the shop and loaded it in our Forester xt. Jen and I left portland, Or. at about 3:00pm on a Sat. made the 13 hr drive to the shop in Cali had brunch with my mom on Sun. then had a late lunch with some friends off of clubwrx (racenut3.0 and his wife) in bay area and made it home 15 mins before I had to leave for work on Mon. morning. We waited about 3 months for the adapter to be made. The wait was worth it fit perfect. The tranny fit in the car almost like the original did the transmount almost lined up. We had to modify the up pipe and down pipe to clear the bellhousing. We also had to go to a front mount intercooler for the same reason. While we were in there we figured we would upgrade the turbo as well, so we went with the FP green. Now with everything bolted place we had a one piece driveshaft made. car was almost ready. I decided to get rid of the UTEC and put an aem since it had a very good antilag drag style spool up ability. Done! I was so excited, it was amazing the car actually drove again after being apart for 4 months. Drove the car for 2 days and started hearing a really wierd noise. I found out on day 9 it was the rear end. Every single component in the rear end was destroyed, the pinion looked the worst. So back to the shop it went. 3 days later put another rearend in it and have been driving it ever since. The car is very detuned right now and pulls way harder than it did before tuned. oh yeah on a side note we had to put wider tires on the car just to drive it cause everytime you shifted it wanted to break lose. but the new toyo proxes t1r in a 255 width does the trick. Well sorry to make it so long but I just wanted to share with the subaru community my swap and get some feed back from you guys. All and all even with upgrading the turbo going to a front mount and getting the aem we still ended up paying less money than if we were to of bought the built tranny. the track isnt open here yet but I cant wait til it does to really see what it can do! once again please give me some feedback on this and ask as many questions as you want thats why I am doing this thread even though Jen doesnt want me to. She wanted to keep it bottled up.

    Thanks for your time-Bobby
    Last edited by 03WRX_YELLOW; 01-05-2006 at 11:01 PM.
    Jennifer - "Consigliere" for the Bugeye Mafia
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    Registered User rpfride's Avatar
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    Interesting. Im just going with the IPT built trany in the near future.
    I'm gonna be mad if it turns out to be TWill in a wig..
    www.xoticmotorsports.com
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    Rwd

    i have seen the car in person and took a ride in it everything about this car was well done!
    RWD suby crazy cool
    12.96@105.6

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    Administrator RayfieldsWRX's Avatar
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    Jen, that's your car, right? Holy crap! How do you like it?
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    Quote Originally Posted by rpfride
    Interesting. Im just going with the IPT built trany in the near future.
    I've thought about an IPT trans or doing a 4eat to MT switch. When this transmission goes ... I'll make my mind up then.

    Jorge(Riftwrx): I've been folowing your memos. Last one we read, the car had limited miles on the IPT. Can you share any more info on how the transmission is holding up and what mods you've been tinkering with?

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    Thanks (03WRX_YELLOW) for sharing that with us?

    Keep us posted how that thing runs (1/4 times and speed) please.

    Sorry for thread crashing in my earlier post.

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    Quote Originally Posted by RayfieldsWRX
    Jen, that's your car, right? Holy crap! How do you like it?

    yup!! Bobby has turned her into a RWD Beast !!
    Jennifer - "Consigliere" for the Bugeye Mafia
    ScoobyDMCtt - Blobeye Syndicate #007
    04 STi ECU - with Protune - FSTi Garrett GT40 -- 422whp-more to come... 12.86 @ 105

    BoBBy TuNED@ preracing.com --- DIFFERENT STROKES

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    some pics of the car located here

    http://my.prostreetonline.com/member/sonic03wrx/its near the bottom of the page of pictures.
    Jennifer - "Consigliere" for the Bugeye Mafia
    ScoobyDMCtt - Blobeye Syndicate #007
    04 STi ECU - with Protune - FSTi Garrett GT40 -- 422whp-more to come... 12.86 @ 105

    BoBBy TuNED@ preracing.com --- DIFFERENT STROKES

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    Boba Fett BrianH's Avatar
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    Quote Originally Posted by 03WRX_YELLOW
    yup!! Bobby has turned her into a RWD Beast !!

    Pretty ****ing cool

    are you the first to have done this?

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    as far as I know I am but you never know there could be someone out there who has and just hasnt told people about it. its really great for what we do with out car I couldnt of asked it to be any better. things went fairly smooth considering and I am very thankful for that.
    Jennifer - "Consigliere" for the Bugeye Mafia
    ScoobyDMCtt - Blobeye Syndicate #007
    04 STi ECU - with Protune - FSTi Garrett GT40 -- 422whp-more to come... 12.86 @ 105

    BoBBy TuNED@ preracing.com --- DIFFERENT STROKES

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    Boba Fett BrianH's Avatar
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    Quote Originally Posted by 03WRX_YELLOW
    as far as I know I am but you never know there could be someone out there who has and just hasnt told people about it. its really great for what we do with out car I couldnt of asked it to be any better. things went fairly smooth considering and I am very thankful for that.

    Yeah, it should be interesting to see if people follow. Definately different and definately cool
    It's not my cup of tea, but still bad assed

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    Administrator RayfieldsWRX's Avatar
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    Nicely done! An FP Green-powered engine without AWD driveline losses.
    Sheesh.
    --Ray
    Grandfather of the Bugeye Mafia
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    yeah before you would feel less and less power with every shift and higher road speeds. Now everytime it shifts it just pulls even harder. and with the fp green it pulls real hard all the way to redline. Its amazing no decline in power all the way through the gears. I am really super excited to see what it will do at the track.
    Jennifer - "Consigliere" for the Bugeye Mafia
    ScoobyDMCtt - Blobeye Syndicate #007
    04 STi ECU - with Protune - FSTi Garrett GT40 -- 422whp-more to come... 12.86 @ 105

    BoBBy TuNED@ preracing.com --- DIFFERENT STROKES

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    Administrator Trainrex's Avatar
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    What made you go with a TH400 instead of a built TH700, or a built 4L60E? The 400 is notorious for soaking up large amounts of power. What converter do you have in it?

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    well the trans. was free and the converter is a 3600 stall 10" converter. the cool thing is about the adapter is that it made the subaru engine have chevy bolt pattern and correct backspacing on the crankshaft. I can virtually go with any chevy tranny that would bolt up to a standard old v-8 chevy motor. for racing a powerglide would most likely be the best choice and for street driving the 700r4 would be good cause of the overdrive. while the 4l60e would be amazing because I have aem engine management wich could control the electonic transmission, only thing is the 4l60e is expensive. But our choices are definately open by doing it the way I did we are not stuck to just the th400.
    Jennifer - "Consigliere" for the Bugeye Mafia
    ScoobyDMCtt - Blobeye Syndicate #007
    04 STi ECU - with Protune - FSTi Garrett GT40 -- 422whp-more to come... 12.86 @ 105

    BoBBy TuNED@ preracing.com --- DIFFERENT STROKES

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