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Old 02-06-2013, 08:57 AM   #1
Craig03WRX
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Default Stock Transmission

ive had my 03 wrx for about 3 months now and ive heard alot of different things about the stock 5 speed wrx transmissions. some people say it can handle any thing as long as you dont try and launch it and other people say it can only handle up to 325hp? on my 03 wrx the only things i have performance wise are my stage 2 tune up done by kinetic motorworks which they said will give me around an extra 50hp and i have an invidia racing catted downpipe which i heard will give me like an extra 3hp. so i figure im at around 280ish. am i close to needing a new transmission? Can someone please set me straight on all this?
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Old 02-06-2013, 09:11 AM   #2
Mr Wrex
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There is no magic number for when they blow. If it blows, either buy a used one and stuff PPG gears in it or do the 6-speed swap. Keep the stock clutch as well so you can't put too much load on the transmission.
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Old 02-06-2013, 09:12 AM   #3
HinshawWRX
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You need not worry about the transmission as long as you know how to drive a 5 speed with AWD. I have no idea what a "stage 2 tune up" is because Stage 2 is a downpipe that you listed and a tune. Don't count numbers on your hands to figure out how many ponies you have to the wheels. Don't launch the car from 5500 rpm and drive responsibly and you'll do just fine.
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Old 02-06-2013, 09:14 AM   #4
ToneWrx02
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Quote:
Originally Posted by Craig03WRX
ive had my 03 wrx for about 3 months now and ive heard alot of different things about the stock 5 speed wrx transmissions. some people say it can handle any thing as long as you dont try and launch it and other people say it can only handle up to 325hp? on my 03 wrx the only things i have performance wise are my stage 2 tune up done by kinetic motorworks which they said will give me around an extra 50hp and i have an invidia racing catted downpipe which i heard will give me like an extra 3hp. so i figure im at around 280ish. am i close to needing a new transmission? Can someone please set me straight on all this?
Ya.. No ur not at 280ish.. Especially on stock turbo. 240ish more or less who knows.

This subject has been on forever. Some people beat their 5 speed and last a long time with it. Others dont launch or race and still break it. Btw
You can have 800whp and never break the trans, unless if ur full throttle and 5k rpms then you will destroy, if ur driving normal, 2.5k shift, almost no throttle, trans will last.

Just dont launch it like a dick and you will be fine.
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Old 02-06-2013, 09:38 AM   #5
jayman4312
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even 240 sounds high, if were talking awhp. Especially with just a downpipe and tune, no other little things here and there.

For example, I'm stage 2ish plus some odds and ends (sti tmic, perrin inlet) and i put down like 208 awhp and like 218 awtq. To be fair that was on a mustang dyno nick-named the heart breaker, and elevation, air temp, all that come into play and all that. Just giving the op an example to go off of.

Also dont launch it like a dick.

Also, its usually 3rd gear that breaks, sometimes 2nd, not 1st gear from launching. so don't launch, but also don't "slam" or "bang" gears as hard as you can all the time.
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Old 02-06-2013, 09:46 AM   #6
leecea
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The OP's math is 227 stock +50 +3 = 280 at the crank. That's the same as Cobb's estimate.
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Old 02-06-2013, 09:48 AM   #7
vision.dynamix
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Quote:
Originally Posted by Craig03WRX View Post
ive had my 03 wrx for about 3 months now and ive heard alot of different things about the stock 5 speed wrx transmissions. some people say it can handle any thing as long as you dont try and launch it and other people say it can only handle up to 325hp? on my 03 wrx the only things i have performance wise are my stage 2 tune up done by kinetic motorworks which they said will give me around an extra 50hp and i have an invidia racing catted downpipe which i heard will give me like an extra 3hp. so i figure im at around 280ish. am i close to needing a new transmission? Can someone please set me straight on all this?
Whats the dyno graph say when Kinetic tuned your car?
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Old 02-06-2013, 10:12 AM   #8
Jack
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I have to think that with your 10 year old car, you have in the neighborhood of 120k miles. If this were my car and the transmission went tomorrow, I think I would be saying "well, it has 120k miles on it....shrug". If it goes, try to find a Legacy GT trans to replace it. Relatively inexpensive and much stronger than what you have.
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Old 02-06-2013, 11:22 AM   #9
Craig03WRX
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they told me the turbo pushed 16psi after the tune. and i didnt get it dinoed cus i didnt have the extra 250. how much cheaper are the leagacy transmissions?
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Old 02-06-2013, 11:23 AM   #10
Craig03WRX
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Quote:
Originally Posted by leecea View Post
The OP's math is 227 stock +50 +3 = 280 at the crank. That's the same as Cobb's estimate.
are you saying i could be right? or do you agree with the others?
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Old 02-06-2013, 11:28 AM   #11
HinshawWRX
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Quote:
Originally Posted by Craig03WRX View Post
they told me the turbo pushed 16psi after the tune. and i didnt get it dinoed cus i didnt have the extra 250. how much cheaper are the leagacy transmissions?
Why? What do you mean cheaper? If you're not having transmission issues you need not worry.
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Old 02-06-2013, 11:53 AM   #12
leecea
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Quote:
Originally Posted by Craig03WRX View Post
are you saying i could be right? or do you agree with the others?
Both

There are two main ways to measure hp.
1. What is the engine producing.
2. What is getting to the wheels.

Power at the wheels is less than engine power, because a lot is absorbed by the drivetrain.

Car specs quote engine hp, and you could be up to 280 on that measure.

Most people on here talk about wheel hp because that's what is usually measured when the car is tuned. That's why there was a disconnect.

It's all a guess unless you have an actual measurement from a dyno.
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Old 02-13-2013, 09:25 PM   #13
kineticmotorworks
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This car was flashed with our stage 2 OpenSource tune and road tuned to adjust boost using a Cobb EBCS. We perform this service as a cheaper alternative to dyno tuning. Typical wheel horsepower for this setup on our dyno is about 220 depending on the condition of the car.
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