carlton_fritz

I'm new and was referred to this site to find info. 2009 SS. When pulling out from a dead stop, if I get on it a little to get into traffic or ahead of oncoming traffic, sometimes the car stays in 1st and won't shift. I let off the gas some to coax it into shifting and it drops out of gear. I know this due to the RPMs going up when I get back on the gas and not accelerating. I then let off the gas for a couple seconds and then the car shifts into 2nd. If it does that while I am trying to pull into traffic, I may end up smashed. If I get on it hard to pull out, it goes fine until it hits what appears to be a rev limiter and then I have nothing like the governor is engaged. It isn't smooth either. I believe the no shifting part is only when the car is cold. However, it did do this one time when I was trying to pass someone. Do not recall if the car was warmed up at that time. Can anyone help?

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wanderson75

Take your car straight to the dealership. Sounds like you've got a bad tranny.

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ImpSS07

You might have some tranny slip, but take it in just in case.

Now if you pull out hard with the T/C(traction control) on then yes its going to kick and buck when you spin the tires. That lets you know it doing its job. Also if you're trying to make a left/right turn and power into it, it will also kick "bog" down.

Also about when you were passing someone and it felt like it didn't shift: If you were out of the power band then it won't respond with a hard downshift and a burst of power.

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carlton_fritz

Took it to the dealer. They "couldn't duplicate the problem". My brother picked the car up and got it to do it with a mechanic riding with him.

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carlton_fritz

It's not bucking. It just refuses to shift into second until I let off the gas for a couple seconds. If I let up and get on it in less than 2 seconds, it's out of gear and the RPMs go up. What's the point of having all that power if you can't use it?

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carlton_fritz

So the dealer tells me that it's normal for the transmission to drop out of gear when it's cold to protect the transmission.

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ImpSS07

Get it in writing with the Service persons name, so if you tranny messes up on you they are liable.

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wanderson75

Personally, I'd take it to another dealer.

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carlton_fritz

I have been to 2 different dealers in 2 different cities. Both make the same claim, they can't get it to do it and it's normal. If it's normal, it's a mistake. It's dangerous to pull into traffic and the car drop out of gear. My mechanic (independent) suggests I add a little fluid to see if it clears up. Maybe I'll check with my neighbor who worked at another GM dealer before moving to Mercedes.

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Z71

That is definitely not normal. My '09 LTZ shifts up crisply and downshifts without any hesitation even with slight throttle input.

I have test driven cars like 2006 Crown Victoria with the sport package and the car was reluctant to downshift when the gas pedal was pressed. It hesitated for about a second before downshifting. I found this unacceptable so I did not buy the car. But not upshifting from the first gear? That seems ridiculous. You may have a faulty pressure solenoid or something in that transmission. Maybe it is acting up intermittently.

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TSS

My 09 SS does not act at all like this. I had a truck, 07 Escalade that had a similar issue - the dealer reprogrammed the ECU with an update and it was all fixed. Have not heard of any TSBs though with the 09 SS.

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