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Old 03-02-2010, 07:14 PM   #1
asrawlings@mchs
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2008 VUE 3.5L
Default 32MPH in 5th gear?

Recently I have noticed my car shifting into 5th gear at 38 MPH and holding onto the gear until 32 MPH before downshifting. This causes a loud bogged down rumble in my engine and the cabin of the vehicle becomes considerable louder as it felt through the exhaust. Highway driving is fine and all gears shift very smoothly up and down. Since this has started happening in January I have been paying more attention to my driving habits and I realize most of my in town driving is stop and go between lights and I notice myself speeding up to about 35-40 MPH before taking my foot off the gas, stopping at the next intersection/light and repeating.

I am assuming the VUE has 'accelerate by wire' technology which I remember from previous posts (2006 VUE) has a memory to it that adapts to your acceleration and driving habits. So with that said is this a case of hard in-town driving and over-time if I change my driving technique will work itself out? I mentioned it to the GM (Saturn Certified) Service Department when I was getting my oil changed but they were too busy to take a look at it (I won’t be returning to that service center to say the least). The service manager assumed my transmission needed to be updated/flashed.

Anyone else noticing this behavior?

2008 3.5L V6 AWD; 18,700 miles
...
2008 Vue XE 3.5L AWD V6 (Gold Package)
2006 Vue 2.2L FWD {Traded w/17,000 Miles}
2004 Ion Quad Coupe II (Special Edition) {Traded w/24,000 Miles}
2002 SC1 Coupe {Traded w/35,000 Miles}
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Old 03-03-2010, 01:41 PM   #2
golftango
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Default Re: 32MPH in 5th gear?

Disregard, I see this is for the 08 VUE
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Last edited by golftango; 03-03-2010 at 01:46 PM.
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Old 03-03-2010, 02:00 PM   #3
Z33Fan
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2008 VUE 2.4L
Default Re: 32MPH in 5th gear?

I think the systems do react to your driving habits. Unplug the ECM fuse overnight; the system should reset and "re-learn" your driving habits.

Hope this helps!
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Old 03-03-2010, 06:02 PM   #4
NJSATXR
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2008 VUE 3.6L
Default Re: 32MPH in 5th gear?

Ours does exactly the same thing with the "drone".

I would imagine the tranny wants to go into as high a gear as possible as early as possible to cut down engine RPMs to save gas. As there is not alot of engine torque at that speed, it "bogs" and you get that noise. If you lightly press on the accelerator at that point, the trans downshifts...revs increase, and the noise goes away.

As I recall, the revs are around 1400-1500 RPM when it makes the noise.

To boot, the gas mileage still ain't great. Oh well....

It's just the way the trans is programmed. If they could reflash it, the revs would be higher and your mileage would suffer even worse.

There might be a slight difference between your 3.5l and ours which is a 3.6l however.
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Old 03-03-2010, 08:13 PM   #5
asrawlings@mchs
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2008 VUE 3.5L
Default Re: 32MPH in 5th gear?

Quote:
Originally Posted by NJSATXR View Post
Ours does exactly the same thing with the "drone".

I would imagine the tranny wants to go into as high a gear as possible as early as possible to cut down engine RPMs to save gas. As there is not alot of engine torque at that speed, it "bogs" and you get that noise. If you lightly press on the accelerator at that point, the trans downshifts...revs increase, and the noise goes away.

As I recall, the revs are around 1400-1500 RPM when it makes the noise.

To boot, the gas mileage still ain't great. Oh well....

It's just the way the trans is programmed. If they could reflash it, the revs would be higher and your mileage would suffer even worse.

There might be a slight difference between your 3.5l and ours which is a 3.6l however.
I am really surprised to hear the 3.6 also acts in this manner. However, I am happy to hear this is not an isolated instance to my vehicle. You're right with RPMs as this is when I notice it as well.
...
2008 Vue XE 3.5L AWD V6 (Gold Package)
2006 Vue 2.2L FWD {Traded w/17,000 Miles}
2004 Ion Quad Coupe II (Special Edition) {Traded w/24,000 Miles}
2002 SC1 Coupe {Traded w/35,000 Miles}
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