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Old 06-22-2005, 12:43 AM   #1
'boxedboxer
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Member#: 87945
Join Date: May 2005
Location: the CO
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'05 WRX Wagon
will maul!

Default Introduction, and some newb 4EAT questions...

Hey everyone,

This is my first post here, I've been lurking for a couple months though... I just got my '05 WRX Wagon in January, and it's awesome... so much fun to drive, I can see why so many of us are obsessed. I want to mod the hell out of it, but I may wait for the warranty to expire.
Regardless, I had a few admittedly newbish questions, which I finally got the nerve to ask after reading the thread on the auto WRX in the general forum:
1. Is it bad for the tranny/drivetrain at all to "downshift" with the 4EAT gear selector, say put it into 2nd around a curve, given that the RPMs wouldn't be too high?

2. Would it be detrimental to "torque break" or "power break" at a launch by left-foot braking and bringing RPMs to like 2-3k? If so, how bad is it?

3. What would be the best first power mod on an AT to reduce lag or spool time, or to get a quicker feeling start? would you all recommend a torque converter, uppipe, TBE, or something else?

Any help you guys could provide would be awesome, I'm really hooked on the Subie and rally experience, and I really wanna learn more... I know this is the best place to do it.
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Old 06-22-2005, 01:19 AM   #2
wrxfactor
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Chapter/Region: NESIC
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2002 WRX w/ JDM STi
6spd, EJ255, VF39 & EWG

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1. I don't really think so. My mom has an 00 Outback SE Sedan 4EAT and she beats on that like woah. The worst thing for your 4EAT is to say, put it in reverse, then while still moving in reverse, put it in drive and hit the gas, or vice versa.

2. I would say, if you're not doing it that often, not to really worry about it. However, I'll leave any factualness that can be supplied to the guys with 4EAT's.

3. I don't have a 4EAT, and my mom's car isn't modded, but I do believe the torque converter has been something most with 4EAT's change in their search for power.

Hope that somewhat helped.

<---Has been driving stick since I learned 2 years ago when I got my permit.
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Old 06-22-2005, 01:57 AM   #3
nerrad5
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Join Date: Aug 2002
Location: Wastonville, CA.
Vehicle:
2002 WRX 4EAT WRB
VF34 Kit w/AP

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[quote='boxedboxer]Hey everyone,

1. Is it bad for the tranny/drivetrain at all to "downshift" with the 4EAT gear selector, say put it into 2nd around a curve, given that the RPMs wouldn't be too high?

Wont hurt anything. If the rpms are too high for the gear, it just wont shift to it. The TCU is pretty smart at protecting the tranny. I know this because I have the 4EAT and do it all the time. Its fun to come to a right turn in second and drop into first in the middle of the turn and then floor it. Just learn when to upshift or you'll bounce off the rev limiter and its kindof embarrassing.


2. Would it be detrimental to "torque break" or "power break" at a launch by left-foot braking and bringing RPMs to like 2-3k? If so, how bad is it?

Its actually pretty cool and snaps your head back when you release the brake, BUT, I wouldnt do it (too often and no more for more then four seconds) What Ive read is its not good for the stock TC and the rear diff is the weak link. Again, this is what I have read in the forums.

3. What would be the best first power mod on an AT to reduce lag or spool time, or to get a quicker feeling start? would you all recommend a torque converter, uppipe, TBE, or something else?

The first mods I did was uppipe and samco IC hoses. This helped in lag. Ive read that a modded TC makes a big difference also. Of course the more you free up the exhaust the better. Then some EM and on and on and on.....

Last edited by nerrad5; 06-22-2005 at 01:36 PM.
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Old 06-22-2005, 02:14 AM   #4
'boxedboxer
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Join Date: May 2005
Location: the CO
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'05 WRX Wagon
will maul!

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wrxfactor... thanks for the quick reply, man. I read one of your posts on the catless exhaust ticket thread, sucks that you've been pulled over that many times. Props for young Subie enthusiats, I'm 20.
I appriciate the comments, but I wanna hear from some WRX 4EAT owners as well! I've been searching and reading alot on the AT since I posted, didn't think to search the technical tranny forum. But I'm still thirsting for knowledge!
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Old 06-22-2005, 02:26 AM   #5
'boxedboxer
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will maul!

Default

nerrad5, wanted to thank you for the reply as well... one more question:
I've heard the ECU adapts to driving style, in that if you drive aggressively, the AT will downshift more readily and hold a gear until a higher shift point... how true is this statement?
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Old 06-22-2005, 04:24 AM   #6
02redwagone
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Thats what it said in my manual. Addaptive. Seems to be the case. If you stomp it rapidly it will tand to go to the lowest possible gear available at speed/ rpm. Slowly seems to get you the next down (sometimes).
Seems to get your routine down ok and read into your jabs at the accelerator.
It likes to be floored quickly and often.

Last edited by 02redwagone; 06-22-2005 at 04:38 AM.
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Old 06-22-2005, 01:35 PM   #7
nerrad5
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Join Date: Aug 2002
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VF34 Kit w/AP

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Ive learned if you want it to downshift all the time you cant just floor it. It wont do it all the time. But if you let off the gas completely, then floor it (you can do it pretty quickly) it downshifts everytime (I havent had it not do it yet)
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Old 06-22-2005, 02:12 PM   #8
f4phantomii
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Quote:
Originally Posted by 'boxedboxer
Hey everyone,
2. Would it be detrimental to "torque break" or "power break" at a launch by left-foot braking and bringing RPMs to like 2-3k? If so, how bad is it?
You can do this. Obviously it isn't great for the car, but you can do it. Things to keep in mind.....

As you rev the engine to a few thousand RPM, the poor torque converter is having to dissipate all that excess power as heat. Thus, as someone else mentioned, you'll want to keep it to a few seconds and give it a chance to cool off a bit before doing it again. In other words, don't do it at every traffic light.

Other than that, it will give you an impressive start right off the bat. The only people that will get a better start are the ones with manual trannies who don't mind dropping the clutch from 4k RPM. Plus your turbo will be spooled up and ready to rock more than the manual tranny guys who didn't have a load on it.

You might want to change your tranny fluid more often that recommended if you make a habit of torque braking. Obviously the heat from doing it will tend to accelerate the breakdown of the tranny fluid a little faster than normal.

-Michael
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