Auto Trans Bogging Down?

[Daytona]

Whenever the car's been in heavy stop-and-go traffic or from other heavy use, I notice that the trans will then bog down when I try to hit the gas. It'll run very sluggish under throttle until it's had time to cool down a little (assuming the trans is running hot). Two weeks ago I hit some highway traffic and detours going to a meeting and to make up time (and let ourt some frustration) once I hit Rt. 18 I floored the gas only to feel it bog or hesitate slightly 3 times while under WOT.

The car is 100% stock with the 3400 engine and auto trans. All of the fluids and filters are also standard non-performance items. The car only has 32,xxx miles on it.

Anyone have any suggestions as to what the problem is and how to correct it? I'm assuming the computer sensor on the trans is purposely limiting something due to temperature readings, but I could be wrong on it.

[|Rev|]

sounds like trans is heating up, but I havn't had this problem. Maybey cuz I got the 2.4l Umm wait to see what someone else says lol, I'm interested to know as well

[Redog]

IDK, are you sure it's the tranny? Are you throwing any codes?

If you go to the dealer for repair, they won't know what's wrong unless a code is on.

It could be the tranny, but it could aslo be the cat, bad plugs, or a bad fuel pump. I'll ask my mech for ya tonight when I pick up my car. :thumbsup:

[FormulaNERD]

sounds like my tranny prob.....

there is an upgraded shift valve, another member on here did it (in a grand am i think)

might wanna search that...

[bigd6983]

if you think its heating up too fast change the fluid or make sure there is enough in there.....

[overdrive75]

I don't believe it to be the transmission. Maybe you are loading the plugs up in the engine doing all the city driving and after wards they have cleaned themselves up. Trust me though, the transmission isn't getting hot enough to do what you are describing. If it was you would be setting a check engine light, and there would be a hot transmission code stored. I don't remember the exact number, but yes there is a code for hot transmission.

[FutureEcotecOwnerAgain]

i have got the 2.2 and im having the same problem. i punch the gas and it seems to jerk a little and not seem to wanna shift. but im not sure

[FantomForceCustoms02]

You might have a bad ignition module. But this only happened when i first started the car. I would get no power what so ever, the steering wheel would shake and pulsate when i hit the gas, and it wouldnt shift. The SES light came on too. The ignition module had to be replaced and I got all new spark plugs. I have the 2.2 ecotech with 41,000 miles.

[Daytona]

Alrighty. It sounds like it could be almost anything (although you left out "sunroof could be ajar"). The car's almost due for it's scheduled oil change anyway so I'll schedule a visit to the dealer in a week or 2 and have thme look for the issue while they're doing the basic service (which they always give to me at a discount). Maybe they will find something wrong that'll require me to take another new DeVille loaner car for the day (or a few days). :thumbsup:

[snake_eyes2]

Curious, I have much of the same problem. Car is VERY slow to shift to second and third under WOT and back if required to gear down. I have 112000Km and thinking about trans fluid change. Or ECM reprogram just for the shift points, nothing else. I swear ;)

[CocoaAlero]

Originally posted by snake_eyes2@May 26 2005, 07:46 PM
Curious, I have much of the same problem. Car is VERY slow to shift to second and third under WOT and back if required to gear down. I have 112000Km and thinking about trans fluid change. Or ECM reprogram just for the shift points, nothing else. I swear ;)
Quoted post

Same here, any more that 1/4 throttle and it takes about 4 seconds to get 2nd gear. If I leave it in "2" I get the normal shift. When in D it's pretty mushy.
3rd's good though. Open for sugestions.

[bigd6983]

Originally posted by overdrive75@Mar 3 2005, 05:55 PM
it was you would be setting a check engine light, and there would be a hot transmission code stored. I don't remember the exact number, but yes there is a code for hot transmission.
Quoted post


do you know exactly how hot it would have to be before it would throw a code like that??

[brsexton]

Daytona, did you ever find out what was going on with your car?

[DansGen1Alero]

have same prob on 99 with 113000+, happened little before now a lot now (got lower intake manifold gasket replaced), when it started to happen I replaced fuel filter, that helped now doing it again, with SES light
Possibilities I have come up with
throttle body needs cleaning
sparks plugs are in wrong spots
crank sensor (that is code i have thrown) may be 2 on alero
trans going up (hope not)
AC filter causing more power to draw from trans
i guess trial and error will have to be performed

might just rebuild whole engine, if not gen1 might be retireing after this summer

[Talon69ca]

I notice the same thing with my car...I drove it around 1'o'clock in the afternoon yesterday when it was pretty hot out...and the car seemed to be lagging...then I went out about 11pm last nite and it was a totally different car...same thing in the cool mornings its really really snappy...then once I've been running around for a bit it bogs again...but its going to the dealer today to have the steering fixed hopefully they scan it and find out if I am pulling any codes.

[SlickSketcher]

i have a 99 2.4L. i get the same thing. whenever it's hot out and i stomp on it, it's sluggish and when it tries to get to 2nd, it really hesitates and once in a while a short grind. but when it's nice and cool out, works wonderfully.

[snake_eyes2]

The rough idle part of mine has been fixed by the new battery, I still think that I need to flush the trans. 113000km and no idea if it has ever been done before, and I bought the car last year with 76000 so i am guessing no.

[cobra621]

Did you find the problem, daytona? Just curious how it worked out.

[-Alero-]

yeah im about to flush all my fluid and replace it with that purple stuff, also replacing filter (offcourse) and gasket. so my tranny should be peppy too

[Daytona]

Originally posted by brsexton+May 29 2005, 10:30 PM--><div class='quotetop'>QUOTE(brsexton @ May 29 2005, 10:30 PM)</div><div class='quotemain'>Daytona, did you ever find out what was going on with your car?
Quoted post
[/b]

Sorry, Barry. I didn't look in this thread again until this morning.


<!--QuoteBegin-cobra621@Jun 14 2005, 09:44 PM
Did you find the problem, daytona? Just curious how it worked out.
Quoted post
[/quote]

No, I never did find out what was wrong. Car read fine at the dealership and has been fine ever since. Haven't driven a lot of heavy gun-and-brake stop-and-go traffic lately, though.

[SlickSketcher]

i've been changing my fluid, filter and gasket every 20,000 miles. i have about 122,000 on mine. that seems to help a little, but i still have small shift problems in extreme heat.

[FormulaNERD]

if it's only in extreme heat, you could try an additive that reduces temps in your tranny, cant remember the name of it, but that's what i used, and it helped.

[Daytona]

^If you remember the name let me know.

[-Alero-]

yeah me too, cause im flushing my fluid this week, and am unsure on what the good stuff i should buy.

[XanderWiFi]

Daytona, I know what you are talking about. When you drive it hard for a good period of time, it is like it kind of gets tired and does not respond as well.

[Nate's Alero]

Daytona, I know what you are talking about. When you drive it hard for a good period of time, it is like it kind of gets tired and does not respond as well.

i think you have done yourself in on this one.....

[01OldsAleroGt]

o.O rose from the dead... damn talk about fail lol

[Nate's Alero]

:lol: :lol: :lol: :lol: :lol: o.O rose from the dead... damn talk about fail lol

[Dhoyle]

holy shit 05 lmao, wow OLD OLD OLD OLD lols

[XanderWiFi]

damned if you do, damned if you don't. Search the threads when you make new ones and get yelled at for old threads when you search. Fuck ma.

[Dhoyle]

yeps thats how it goes lols

[cherrington17]

damned if you do, damned if you don't. Search the threads when you make new ones and get yelled at for old threads when you search. eff ma.

raising threads from the dead isn't a bad thing... IF AND ONLY IF YOUR REASON IS RELAVENT.

you brought up a comment to the Original Poster, just to make a comment.

this didn't help or hurt anyone. therefore, pointless.

create a new one if the info isn't around
raise a dead one, if you have something pertainent to add.

DON'T raise a dead one to add "yeah, i agree lulz" thats just annoying

[TheEdgeofSanity]

ok, well i want to make this thread purposeful. this is the EXACT problem my car has and i thought i was crazy and imagining it until i read this thread. did anybody ever come to a conclusion on this?