Shifting 4EAT

LegacyPunk · Post by **LegacyPunk** » Wed Aug 04, 2004 8:31 pm

Just some questions about manually shifting the 4EAT.
1. Will it hurt anything?
2. Will it affect gas mileage?
Basically I started shifting it manually the other day and I noticed that I got A LOT more power will a lot less gas pedal. I really like this as some times when its just in D, I accelerate it seems to take a second to get power up, (i blame my IC for upping the time it takes for the turbo to spool).
I would like to just shift the 4EAT from here on out, plus it seems to make my CEL to go out.

mTk · Post by **mTk** » Wed Aug 04, 2004 8:33 pm

1. no
2. it can if you let the engien rev up higher in each gear thatn you would if you were not manually shifting.

MK

THAWA · Post by **THAWA** » Thu Aug 05, 2004 3:50 am

i recommend it, also recommend an ATF cooler.

BAC5.2 · Post by **BAC5.2** » Thu Aug 05, 2004 8:44 am

My turbo spools ridiculously fast, even with my IC... I doubt that's the lag.

No harm in manually shifting an auto. If you want to do it right, you can always do a 5mt sway.

WRXdan · Post by **WRXdan** » Thu Aug 05, 2004 3:01 pm

THAWA wrote:i recommend it, also recommend an ATF cooler.

YES..YES.. trans coolers are a must!! I would rather spend $40 on a cooler than $1000+ for a 4EAT.

LegacyPunk · Post by **LegacyPunk** » Fri Aug 06, 2004 2:13 am

Is an ATF cooler like an oil cooler? Does it just hook up to the lines leading to the radiator? And can someone explain Why I'd need one, like the mechanics of why I'd need one.

THAWA · Post by **THAWA** » Fri Aug 06, 2004 2:20 am

I dunno what the differences are between an atf cooler and an oil cooler if there are any, but they're similar (if not the same) I'd probably put it in series after the atf heat exchanger(where the lines go from the tranny to the radiator). The reason you need one is because heat is the enemy of just about everything, and tranny fluid is no exception. The hotter it gets the worse it gets. the worse your ATF gets the worse your tranny gets. There was a chart somewhere, lemme see if I can find it.

THAWA · Post by **THAWA** » Fri Aug 06, 2004 2:25 am

dont ask how accurate it is, but you get the point.

elkaboom · Post by **elkaboom** » Fri Aug 06, 2004 4:29 am

Where have you guys mounted your ATF coolers?
I bought one, but couldn't find anywhere to mount it. so I ended up returning it.
I can only imagine that it would be more difficult to install on a turbo than an n/a. As it was, I was friggin' stumped as to find a place to do a 100% efficient installation.

THAWA · Post by **THAWA** » Fri Aug 06, 2004 4:46 am

Why would it be harder on a turbo, I dont understand?

elkaboom · Post by **elkaboom** » Fri Aug 06, 2004 12:15 pm

I'm only speculating here, but I assumed it would be more difficult to install because space would be a factor. The n/a bay, forward engine space etc, is sorta cramped for anything as large ("large" being quite relative mind you) as a auto tranny cooler. Sooo, seeing as how the turbo engine compartment is even more cramped, I was wondering where you would mount the cooler? That's all.
I was considering trying to fabricate a top mount, but that seemed like a stupid idea as all the heat in the engine compartment tends to rise anyway, and there is little circulation. Also, I don't think I could effectively fit it on a top mounted assembly without smashing it with the hood or against the coilpack or intake manifold.
I briefly toyed with the idea of mounting it under the car too: more room, more exposure to cooler air, etc, but there are waaaaay too many reason why that would probably be an even worse idea than top mounting it.
As it is, I can't fit it behind or in front of the radiator so wherever it ends up, chances are good that it'll only be cooling at a limited capacity regardless.
Looks like I derailed the thread a bit... sorry.

*edit*
Keep in mind that my car's an automatic so it's kinda tight in there already.

vrg3 · Post by **vrg3** » Fri Aug 06, 2004 2:38 pm

The turbo engine bay isn't really more crowded except right around the turbo.

The heat exchanger would have to go up at the front anyway, where the other heat exchangers are, so it shouldn't matter.

WRXdan · Post by **WRXdan** » Fri Aug 06, 2004 3:22 pm

Oil cooler and trans oil cooler are basically the same in design. There are different types of oil coolers..anyway. The common mounting point is on the front of the radiator/AC condenser. you need to take the grill off to understand what I'm saying. The trans lines are on the drivers side of the radiator so that make a good spot for the extra cooler.

Important:

Connect the aftermarket cooler in series AFTER the factory trans cooler (which is built into the radiator)! On the 4EAT you will see 2 lines coming off it, one near the front and one near the tail shaft. The front line is the OUT, the rear is the IN.

THAWA · Post by **THAWA** » Fri Aug 06, 2004 4:15 pm

to expand on what wrxdan said, the line from the front goes to the top of the radiator and the line at the rear comes from the bottom of the radiator, so if you wanted it to be after the stock heat exchanger, you'd use the line from the bottom.

elkaboom · Post by **elkaboom** » Fri Aug 06, 2004 6:34 pm

WRXdan: Yeah, I originally intended to mount the unit there (e.g., in front of the radiator and behind the grill), but there's no way it would fit without moding the grill to some extent and I'm not exactly down for that.
Hooking it up was'nt the problem in any event, per se, finding a good spot for it was.
Oh wel, maybe I can find a really small one somewhere; it would'nt be as efficient, but it'd still be better than nothing.

LegacyPunk · Post by **LegacyPunk** » Fri Aug 06, 2004 6:44 pm

Well, since my clutches recently burned out and have been replaced, I think this ATF cooler thing is a good idea. I have plenty of space in front of my radiator since I removed the A/C and condenser. Now I just need to find one somewhere. Thanks guys.

ultrasonic · Post by **ultrasonic** » Fri Aug 06, 2004 7:23 pm

Important:

Connect the aftermarket cooler in series AFTER the factory trans cooler (which is built into the radiator)!

That's interesting. While I was hanging out on the SVX boards, at least one guy had a good arguement for mounting the aftermarket cooler before the one in the radiator. The arguement was roughly this: most people experienced decreased transmission performance prior to the ATF reaching normal operating temp, especially during cold weather. So the idea is that the add on ATF cooler would get rid of a bunch of heat straight out of the transmission, then the stock cooler would bring the ATF up to a normal and stable temp before it goes back into the transmission.

Now, I'm no expert on AT's. Hell, I've not even owned one in over 12 years. But what he said made sense to me, and he reported good results on his SVX, and we all know how delicate the 4EAT is in that car.

Any experts wish to comment?

WRXdan · Post by **WRXdan** » Fri Aug 06, 2004 9:22 pm

ultrasonic wrote:
Important:

Connect the aftermarket cooler in series AFTER the factory trans cooler (which is built into the radiator)!
That's interesting. While I was hanging out on the SVX boards, at least one guy had a good arguement for mounting the aftermarket cooler before the one in the radiator. The arguement was roughly this: most people experienced decreased transmission performance prior to the ATF reaching normal operating temp, especially during cold weather. So the idea is that the add on ATF cooler would get rid of a bunch of heat straight out of the transmission, then the stock cooler would bring the ATF up to a normal and stable temp before it goes back into the transmission.

Now, I'm no expert on AT's. Hell, I've not even owned one in over 12 years. But what he said made sense to me, and he reported good results on his SVX, and we all know how delicate the 4EAT is in that car.

Any experts wish to comment?

Yes good point, the 4eat has a temp sensor mounted to the valve body.

legacycentral bbs

A forum for 89-94 BC-BF(BJ) Legacy Owners and Fans

Shifting 4EAT

Shifting 4EAT