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Old 07-06-2004, 05:42 PM   #1
D-Speed 2.5
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Default Boosted 4EAT Guys

I know there are some of you guys out there...

I was wondering if just a tranny cooler would be suffiecient in protecting my 4EAT at 4-5 lbs of boost and probably 60% increase in Torque (Just a guess)?

I know about the valve body stuff... but i'm not looking for crazy transmission performance. I just want to make sure my 4EAT with a tranny cooler and good fluid would be fine at 4-5lbs. (Tranny has about 60k miles on it.)

Do any of you have a similiar boosted set up on your 4EAT?
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Old 07-06-2004, 06:47 PM   #2
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Anyone out there? I would have posted in the transmission forum but since this is specific to a boosted EJ25 i'm gunna leave it in here.
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Old 07-06-2004, 09:51 PM   #3
inpreza kid
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your fine at 4-5lbs. you shouldn't have any problems until you go over 10psi.
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Old 07-06-2004, 10:24 PM   #4
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You should be fine as long as you don't do any heavy track events or so, and even then, you're in Colorado!
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Old 07-07-2004, 12:34 AM   #5
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Make sure you have a upgraded cooling system and check your fluids. You should be alright for a mild boost setup.
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Old 07-07-2004, 12:39 AM   #6
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I've ran as much as 7lbs. of boost on my complete stock auto and it has ran fine.
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Old 07-07-2004, 01:52 AM   #7
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I have an ej22T on my 95 auto, its doing fine.
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Old 07-07-2004, 10:19 AM   #8
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Cool thanks. I need the tranny cooler anyways b/c I do a lot of mountain driving. I will be adding a good tranny cooler and new fluids. Thanks for all the help. Once done, I'll post an update on the boosted 4EAT EJ25.
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Old 07-07-2004, 03:37 PM   #9
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I also have a boosted EJ25 AT. I am using a small Trans cooler in front of the radiator. I also used the factory performance gauge pack's oil temp gauge to monitor Trans temps and rarely see over 70C, 80-85C in bumper to bumper traffic on the hottest of South Florida days. I am only boosting 3.5psi though but I am sure 5psi is fine. (My wastegate has the .25bar spring)
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Old 07-07-2004, 04:48 PM   #10
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Quote:
Originally posted by ForesterPerformance
I also have a boosted EJ25 AT. I am using a small Trans cooler in front of the radiator. I also used the factory performance gauge pack's oil temp gauge to monitor Trans temps and rarely see over 70C, 80-85C in bumper to bumper traffic on the hottest of South Florida days. I am only boosting 3.5psi though but I am sure 5psi is fine. (My wastegate has the .25bar spring)
Did the temp sensor for the gauge pack fit right into the trany? Where is the sensor mounted?


Also, are any of you guys woried about having long lines for your trany cooler? I was trying to think of places that it could be mounted closer to the trany so that the lines are not so long.
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Old 07-11-2004, 02:32 AM   #11
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I was boosted for almost 40,000 miles with a supercharger. That meant alot of torque stress on launches. I used a Hayden 403 tranmission cooler and mobil one synthetic atf. The lines ran from the drivers side of my engine bay to 3/4 of the passenger side of the radiator where the cooler is mounted. The car went though an accident in which the radiator had to be replaced and the hayden showed no damage at all. I'm no longer boosted but when I stopped around 100,000 miles the car shifted just fine. It now has 102,000 on it and the tranmission is still tight.

my 2 cents.
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Old 07-11-2004, 03:05 AM   #12
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All the positive feedback on the 4EAT is very good to hear. I have been turboed for about 3 weeks. I drive my car very hard so it makes me feel better hearing all the good responses about the 4EAT.
Ryan
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Old 07-11-2004, 03:52 PM   #13
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The 4eat is a pretty stout unit. With a good cooler and fluid they're nice and reliable up to about 10lbs. If you don't get your temps too hot and keep a very close eye out for any slipping you'll be fine.
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Old 07-12-2004, 10:42 AM   #14
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Thanks again for all the response. I am pleased to hear that I should be good to go on a Tranny Cooler an good Fluid. Boost here we come!
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Old 07-12-2004, 07:25 PM   #15
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Quote:
Originally posted by Joncas
I was boosted for almost 40,000 miles with a supercharger. That meant alot of torque stress on launches. I used a Hayden 403 tranmission cooler and mobil one synthetic atf. The lines ran from the drivers side of my engine bay to 3/4 of the passenger side of the radiator where the cooler is mounted. The car went though an accident in which the radiator had to be replaced and the hayden showed no damage at all. I'm no longer boosted but when I stopped around 100,000 miles the car shifted just fine. It now has 102,000 on it and the tranmission is still tight.

my 2 cents.
Do you have some pictures of the unit mounted?

Thanks
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Old 07-13-2004, 05:48 PM   #16
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The 4EAT is probably one of the strongest that subaru makes.
Just Ask These Guys:
http://www.rigoliracing.com.au/
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Old 07-24-2004, 08:50 PM   #17
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Has anyone had problems running some type of aftermarket ecu and the 4eat?

I am tuning my tec and when I take the car our of park it goes into a lean condition and stalls.
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Old 07-25-2004, 01:39 PM   #18
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I got a chance to talk with Easy Street when they were in town last. They're 4eat used straight cut gears. I'm not sure if it still uses a ratchet type shifter or not. I'd love to be able to click through really tough gears THAT easily, even if gear whine was an issue. They were NOT cheap, though. Oh well...hope my stock tranny holds with the new blower.
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Old 07-27-2004, 12:07 PM   #19
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I don't have any pictures of my piping and stuff but if it ever stops raining here in NY I'll snap a few shots.

Here are the possible problems I've encountered with the 4eat. Each is fairly insignificant.

1. On MAF equipped if you happen to unplug the MAF or the MAF should get drenched in water the Transmission light will come on and flash. Owners manual says that you need to turn your car into the dealer immediately along with your check book. No - worries, normal condition.

2. If the transmission doesn't get a proper TPS signal then it gets upset. Therefore those of you running a J&S safeguard (ultra safeguard model) shouldn't hook up the TPS signal if you are using the J&S under boost. It will cause the tranmission to downshift everytime you hit boost if it is within a safe RPM range to do so. - VERY annoying but its nothing having to with the J&S, it's the way the TCU works.
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Old 07-27-2004, 04:42 PM   #20
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Quote:
Originally Posted by Joncas
2. If the transmission doesn't get a proper TPS signal then it gets upset. Therefore those of you running a J&S safeguard (ultra safeguard model) shouldn't hook up the TPS signal if you are using the J&S under boost. It will cause the tranmission to downshift everytime you hit boost if it is within a safe RPM range to do so. - VERY annoying but its nothing having to with the J&S, it's the way the TCU works.

Hrrmm, that would seem like it would be an advantage speed wise. I can understand it being annoying though for someone just driving around. I think I'd like this though.
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Old 07-27-2004, 04:55 PM   #21
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where on the tranny did you guys plug in your tranny temp sensor for the gauge?
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Old 07-28-2004, 12:21 PM   #22
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Just received my Hayden 403. Awesome little unit!
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Old 07-28-2004, 10:38 PM   #23
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man you guys must have different TCU code or somthing, or it must be the extra couple hundred pounds of my car cause i was slipping at 6psi on my 4EAT

good to hear you guys are having no probs though. i decided to upgrade

Ben
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Old 07-29-2004, 01:35 PM   #24
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Quote:
Originally Posted by 2.5 Blue Roo
where on the tranny did you guys plug in your tranny temp sensor for the gauge?
I used the Factory Performance Gauge Pack's Oil Temp Gauge (since it just says TEMP not OIL TEMP). The Oil Pan drainplug and the Tranny Pan drainplug are identical, so you can just use the sending unit-plug in the tranny.

Or, you could remove the pan, drill it and tap it for the Autometer sending unit and use it... Since I got a second-hand Gauge Pack (thanks Wedge) for free, this was the way I went...

FWIW: all-subaru.com has the black-faced performance gauge packs on clearance for less than $200.
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