00' Alero

[the_weber]

Just got my alero a few weeks back and Have been doing research. I've done some searching and some reading on here but I still have questions.

I'm running the 2.4L and I'm still trying to figure out which transmission is in it.

The thing is a little sluggish shifting if I floor it. It will hit 7000 RPMs no problem and still not shift, which is not good. I let it dies down a little earlier than that and when it is 5000 I push the gas again and it usually shifts. Why is that? It only seems to do it when I start my run so maybe 1st and second gear. Any help would be nice? I didnt flush the system when I changed the tranny fluid and filter because the fluid inside was still pretty clean.


I am considering swapping the secret cams from the 2.3L. How hard is it to do? Will i need to remove the engine? Stupid question I know but I'm not sure if this a DOHC engine or not.

Do headers (dyno tested preferablly) have a very large HP/torque boost?

WAI/CAI? Which is better, I personally think a CAI makes more sense but dyno tests don't lie.

different throttle body worth it?

What are some other ways I can make this faster that is actually going to work. Don't have the money to do forced induction so that is out of the question.

I know this is a lot for my first post lol but I did as much research as a could on my own before coming back for the post.

Thanks

Also I should point out that as far as passing emissions that is not a problem where I live. No emissions testign FTW

[JLw7123]

well to answer your first question the tranny in the 2.4l is a 4T40E second the 2.4 is a twin cam. i think that the CAI is better than the WAI.

[the_weber]

I know its a twin but are they OHC? and whats the average 0-60 time for a stock 2.4? Mine is 10. Which I KNOW is not right. Something is wrong there.

[JLw7123]

I know its a twin but are they OHC? and whats the average 0-60 time for a stock 2.4? Mine is 10. Which I KNOW is not right. Something is wrong there.
yes it is a DOHC

[the_weber]

Ok thank you. sO I shouldnt need to remove the engine to do a cam swap?

[AZFire316]

twin cam pushrod...is there such an engine?

[the_weber]

I really need that transmission question answsered

[Lucalare]

I really need that transmission question answsered

well to answer your first question the tranny in the 2.4l is a 4T40E second the 2.4 is a twin cam. i think that the CAI is better than the WAI.

Way to thread skim

[the_weber]

The thing is a little sluggish shifting if I floor it. It will hit 7000 RPMs no problem and still not shift, which is not good. I let it dies down a little earlier than that and when it is 5000 I push the gas again and it usually shifts. Why is that? It only seems to do it when I start my run so maybe 1st and second gear. Any help would be nice? I didnt flush the system when I changed the tranny fluid and filter because the fluid inside was still pretty clean.


I was referring to this. Way to assume

[AZFire316]

I had a Maxima that used to do that, not good, transmission went out like 2 months later.

[the_weber]

its only when I floor it. But im prfepared to replace the transmission if I have to.

[AZFire316]

like it will bounce off the rev limiter in 1st?

[the_weber]

no. no rev limiter. nothing. If I dont let off the gas it will hit redline and keep going. Im not sure where it stops because I always stop it at 5000. Shifts kind of hard.

[AZFire316]

no codes?

[the_weber]

none. The car runs flawlessly. Just shifts weird.

[AZFire316]

did it start after the service?

[Redog]

Check the trans fliud?

Shift Soilnoid?

Try getting it scaned anyway, sometimes the code doesn't show up on the dash. It's in a "pending" status

I know it sounds weird, but my car has done that for O2 sensors ;)

[Chris2000]

Redog theres a reason no one else important has jumped in on this thread. This thread is useless.

1. There's no reason to be hitting 7000rpm.
2. You haven't done jack sh!t in research obviously
3. You don't have the money to do forged induction but u have the money to replace ur trans?
4. What don't you get about TWIN cam? Twin means 2. Yes its a "D"OHC (DUAL = 2)

[sleepyalero]

Redog theres a reason no one else important has jumped in on this thread. This thread is useless.

1. There's no reason to be hitting 7000rpm.
2. You haven't done jack sh!t in research obviously
3. You don't have the money to do forged induction but u have the money to replace ur trans?
4. What don't you get about TWIN cam? Twin means 2. Yes its a "D"OHC (DUAL = 2)

yes... but its his car and im sure hes just testing it out. and the way i look at it is he was just making sure the car ran great... even with the peddle to the floor just incase sometime he needed to go that heavy into it to make sure that it would not hesitate/have problems.

like today for me.. i was pulling out on a busy road.. cars doing about 60 both ways... and there is a little gap between cars that are coming both ways.. so i gun it knowing ill make it and pull out because... the traffic never ends... so when there is a small opening you take it. and i floored the car and didnt have problems.

thats just the way i see it. i say atleast he's being observant... he could drive like a grandma and never go that high into the rpms then one day maybe have tranny problems and not know why because it ran fine driving like a grandma.... but obviously there is something not right on how the car is acting.

and chris, im not trying to call you out.. im just saying.

[Ttop191]

Redog theres a reason no one else important has jumped in on this thread. This thread is useless.

1. There's no reason to be hitting 7000rpm.
2. You haven't done jack sh!t in research obviously
3. You don't have the money to do forged induction but u have the money to replace ur trans?
4. What don't you get about TWIN cam? Twin means 2. Yes its a "D"OHC (DUAL = 2)

way to be a douche bag...
it's pretty clear he's having trans problems under WOT
he obviously has done some research if he knows about secret cams...
it's forced induction not forged...wtf is wrong with you?
and he knew it was dual cams...he didn't know if it was OHC which for us is basic but he's new cut him some fucking slack you were a noob yourself once...

/rant


edit: and to answer one of the OP's questions, 10 secs 0-60 is pretty normal for stock, i was seeing like 9.8 with my LD9 IIRC

[03Sleepr]

twin cam pushrod...is there such an engine?

I think MG has a few twin cam pushrod engines.. pretty sure ford has one, and a couple years ago GM was talking about engineering one..
http://www.gmhightechperformance.com/events/0904gmhtp_2008_advance_engine_technology_conferenc e/photo_05.html

[xXManwhoreXx]

regardless of transmission issues it should not go above the rev limiter.....

[sleepyalero]

way to be a douche bag...
it's pretty clear he's having trans problems under WOT
he obviously has done some research if he knows about secret cams...
it's forced induction not forged...wtf is wrong with you?
and he knew it was dual cams...he didn't know if it was OHC which for us is basic but he's new cut him some effing slack you were a noob yourself once...

/rant


edit: and to answer one of the OP's questions, 10 secs 0-60 is pretty normal for stock, i was seeing like 9.8 with my LD9 IIRC

:haha: :haha:

[the_weber]

Thank you to the guys who told the douchebag off. Back to the problem at hand. It was doing it before the service. Fluid is good. How would I check the solenoid? How hard would it be to replace? Where is it at?

Also as to my other questions, like headers, cams, etc any answers?

Thanks again for those trying to help me out.

[the_weber]

Redog theres a reason no one else important has jumped in on this thread. This thread is useless.

1. There's no reason to be hitting 7000rpm.
2. You haven't done jack sh!t in research obviously
3. You don't have the money to do forged induction but u have the money to replace ur trans?
4. What don't you get about TWIN cam? Twin means 2. Yes its a "D"OHC (DUAL = 2)

1. Thats what Im saying? Im trying to figure why it is hitting 7000 RPM and not shifting.
2. You should have seen the list of questions I had before I posted this.
3. Replacement transmission would cost me about 1000 for a brand new one or 600 for one with 30k miles. I would do my own work and pull it out myself. So yes being that FORCED (not forged) induction runs over 2 grand and transmission would cost roughly $800 I think i can afford to replace the tranny but not do forced induction.
4. I new it was twin. I wasnt sure if it was OHC.
5. Your an a55hole.


Have I made myself clear to you?

[sleepyalero]

headers for the v6 are supposed to be a sure 15+ hp... i have a v6 but im not sure on your car, im sure its pretty much the same gain.

[the_weber]

regardless of transmission issues it should not go above the rev limiter.....

ok so why is it?

[BoarderTy]

My 2.4L goes to about 6500 i believe and then shifts but thats only if i pin 'er and its a harder then normal shift.

[AndyT3]

no. no rev limiter. nothing. If I don't let off the gas it will hit red-line and keep going. I'm not sure where it stops because I always stop it at 5000. Shifts kind of hard.

I have the same car, essentially. 2000 2.4, and when I get on it, it goes down into red line, almost to the max (about halfway into red-line) and then shifts. From what I understand, these twin cam engines get most of their power at high RPM. If I remember correctly I remember reading a bulletin from GM in some down time at work. It was a customer complaint bulletin dated in like 2001; customers complaining that when merging onto a highway, or otherwise going WOT, the vehicle would red-line, and that this was normal opperation of vehicles equipped with the 2.4.

[Lucalare]

That makes sense, smaller engines generally do well at high RPMs, and bigger engines tend to blow to pieces above 6k (I'm talking about stock, my v8 Dodge redlined at about 4800)

edit: Also think motorcycles, some of the sport bikes out there do 15k RPMs stock.

[AZFire316]

That was the old day V8s, newer ones like to rev also, Corvette for example redlines at 7K stock, and thats the LS7 engine, and the Cobras rev to 7.5K stock.

[the_weber]

So it is perfectly normal for me to be doing like 40 MPH the RPMs being at about 7000 and it doesnt shift until I let it drop down?

[BoarderTy]

Depends on if your cruising at 40 or just like hitting 40 while on your way to a higher speed. for instance from a stop if i just hit the gas it will redline at 6500 then shift and thats at about 45

[the_weber]

Ok. So normalish. Well I guess I will just ride it out until my transmission dies or maybe I will get lucky and it's nothing.

So making this car faster. 150 HP isnt bad for a bone stock 2.4L but I want faster. 200 HP non boosted doable? if so how?

[widbyj]

200HP without boost is not likely... Better intake flow will help some. Pacesetter makes a nice exhaust header that will help a lot, you'll need to change to a heated O2 sensor for it to work properly. With the header you will want to upgrade the entire exhaust system also, high-flow cat and larger pipe at least.

Running boosted you can reach 400HP but it will cost a fair bit. Simplest would be to use one of the GM supercharger setups. Turbo will require a fair bit of custom fabrication. Might I suggest quad4forums as a place with answers to your questions, most people around here think the V6 is better...

Sounds like your trans is getting near the end of its life, worn clutches. Plan to swap it. If you are serious about increasing HP it would be wise to look at getting a high-performance rebuild done on the trans, it doesn't take long to blow an older trans when putting more horses into it.

[xXManwhoreXx]

200 wouldnt be that hard with some itb's with step off injectors, insane cams, and headwork, some titanium valves springs and retainers, some equal length headers, balanced to 10k rpms, cryo dripped internals yaaa boii


Or you can get a supercharger

[Redog]

headers for the v6 are supposed to be a sure 15+ hp... i have a v6 but im not sure on your car, im sure its pretty much the same gain.


Most header companies that make headers for the 3400 Alero boast a 20 hp gain at the wheels. Crank HP on the V6 Alero is 170, wheel HP is about 134 (figuring on a 20% driveline loss) so it's roughly a 15% hp gain (14.9% to be exact)