2.4L automatic SHIFTS TOO SOON

Spike440 · 03-20-2010, 01:44 PM

My 01 alero shifts extremely fast when you stomp on it, but the rpms stay at about 2200 ( never more than 3k ) but if i go through the 1-3 the acceleration stays at a normal rate. I have no idea what is causing this I dont believe its the engine because i just had an engine out of a sunfire dropped into it and it did the same thing before. I might not be describing it specific enough but maybe I can take a vid of it on my way to work or something then you can see it very clearly. Let me know if any of you have any ideas, its been bugging the crap out of me! thanks

also this forum is very helpful and awesome, ive been on here nonstop since last night haha

[ion] C2 · 03-20-2010, 01:48 PM

So you're saying at WOT it shifts at 2200 instead of 6450?

Spike440 · 03-20-2010, 01:51 PM

Im assuming WOT is wide open throttle, so yes, it shifts at a very low rpm at wide open, and accelerates slower than my mercury tracer that runs on 3 cylinders. XD

Spike440 · 03-20-2010, 02:29 PM

think Its a tranny problem? I tried googling a ton of different things but nothing comes up for the problem im having

Chris2000 · 03-20-2010, 03:53 PM

Did you try cleaning your throttle body out? Simple things like that can have a huge effect.

Spike440 · 03-20-2010, 04:33 PM

It did this when i purchased it and the motor blew so I had a motor from a sunfire dropped into it. When they drop a used motor in do they use the original throttle body, or the one from the other engine? im not sure on this but no I havent cleaned the throttle body out. If I put the car in 1 and accelerate it will accelerate quickly, i just have to push the shifter into 2 and then to 3, then to drive to get to overdrive, whereas if its in drive and i floor it, it will hit 2nd at 30, then overdrive at 40

AlbinoMonkeyRat · 03-20-2010, 04:50 PM

is it throwing any codes? this sounds like either a problem in programming or compatibility from the new engine and the old transmission.

Spike440 · 03-20-2010, 05:06 PM

It did it even with the old engine though. and the service engine light is not on.

Spike440 · 03-20-2010, 06:05 PM

http://www.youtube.com/watch?v=xfGu7kvvkwM
this is what it is doing...

Weazel · 03-20-2010, 08:30 PM

Did you try resetting it?

Spike440 · 03-20-2010, 08:49 PM

how would you reset it? and reset what?

Nate's Alero · 03-20-2010, 08:54 PM

unhook the battery for a night

Spike440 · 03-20-2010, 09:54 PM

I had a new battery put in it when i bought it, would it have to be unhooked for more than 30 mins?

Nate's Alero · 03-20-2010, 10:14 PM

Quote:

Originally Posted by Spike440

I had a new battery put in it when i bought it, would it have to be unhooked for more than 30 mins?

1 hour or more

Spike440 · 03-20-2010, 11:43 PM

both terminals? i was thinking about it and the battery was unhooked for about 2 days while the replacement motor was being put in.

[ion] C2 · 03-20-2010, 11:54 PM

disconnect the catalytic converter flange and see how it drives after that (ridiculously loud obviously but try it)

heineck · 03-20-2010, 11:54 PM

watch out john deere alero commin down the street

Spike440 · 03-21-2010, 07:32 PM

It doesnt downshift either, if im in overdrive and floor it no matter the speed it stays in overdrive.

Th0r · 03-22-2010, 09:17 AM

Pull the codes. Your SES light is on. That usually means you have a problem...

Spike440 · 03-22-2010, 10:09 AM

SES light isnt on, the TRAC OFF light is on, and "low washer fluid" lol i tried to zoom in the camera so you could read it.