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Pontiac G6 Transmission



  • gonogogonogo Posts: 879
    I could not help you with that, mine is covered with a plastic shield, can't even see the engine. Some day I am going to remove it and take a look.
  • bvdj84bvdj84 Posts: 1,724
    Okay, well I just got back last night from a 2,200 miles trip to Florida. My mother drove the car pretty much the whole trip. Get this!! I have not told her about how its been shifting weird. She actually eventually stated that it seems to shift rough and sorta looses power in some areas. She said that, I never even told her about it.
    It is the very thing I have been feeling all along too! Also, the cruise is not real smooth either, at one point the car stayed too long in 4,000rpms. Then it dropped down. But, it was loaded with 5 people in the car, plus luggage. It scared me a bit, I am like wow, I thought it finally messed up!! I honestly was startled.
    Then it went back down.

    So, I did not even have to say anything to my mom about it, she noticed it. She was like, "I didn't want to say anything, but it shifts a bit rough and seems to not have that kick in power when you need it". Because its refers back to the transmission or related issue.

    Pontiac Service Rep has called me, asking if I had taken it back to the dealer for service. I haven't yet. I might take it this week. I am so tired of bringing it in, and they diagnose nothing!! Now, its not just me, its my mom that has felt it and I didn't even tell her about it. I am so done!!!! I am so mad!! I am either deciding to drive it until I can trade it, which will be closer to 2010 or try to trade it again now for the Accord Or VW I want now.

    I HATE to say this, but I want it to get worse, so that they will notice it!! And not think I am some weirdo. The other 3 G6's didn't drive like this!!

    What do you guys think I should do at this point??

    -I could bring this discussion in to the dealer so they can see there are others with the same problems. Have them diagnose something.


    Back in June, I could have traded, but....
    2009 Jetta SE
    $3,000 down, and another $3,000 on the new leased Jetta

    Now way was I going to do that deal. I would have $400+ payment and still have $3,000 down. Bad deal. But that was my first attempt, and the dealer could have bumped it up to get something out of it too! People trade all the time, there has to be a way!! It can be done, Surely better than that. I have had the car for 17mths now. I have 39mth lease.

    Do you think I could trade now?? I know I might be upside down some, but it should be going down some by now. And it depends on the dealer too. I only tried to trade once.

    Help is much appreciated! Thanks guys!

    It does make me mad, because I love the car itself, but the engine is absolutely horrible!!
  • I have a 2008 G6 with, What I thought, was transmission problems. The problem I was experiencing was hard or jerking when the tranny would shift. I took it to the dealer and they could not find any codes in the tranny to indicate that there was anything wrong. After further investigation they found a faulty spark plug and wire on the number 1 cylinder. They explained to me that when the engine came under a load the plug would foul out and it would feel like the tranny would shift hard. I was skeptical about the diagnosis but I told them to change the plug and wire. It has been a week now and the car is still running great. I would have never have thought that could have been the culprit. Good luck
  • bvdj84bvdj84 Posts: 1,724
    Wow, exactly, I am not sure. Dealer said the same thing. No sign of any problem.
    However, I am wanting to bring the car in and have them look at all of those parts.

    But, I am just so tired of dropping the car off only to get nothing done! I am gathering all the info I can, and doing it!
  • gonogogonogo Posts: 879
    Glad to see it 's running good, a bad wire or plug would set miss fire code.
  • I'm new to the forum and im trying to figure out are these transmissions automatic or manual. I have a 3.9 LTZ with automatic tranny and i've had the same jerking/jolting actions. 90K miles (5000 miles out of warranty) and its starting to get worse. :confuse: So far i've had to get the throttle boddy cleaned (from carbon build up) and a new watter pump. Do you think the OCV remedy from Sebastian7704 wld work
  • bvdj84bvdj84 Posts: 1,724
    Ok, well my 08 G6 has been at the dealer since Tuesday! Again! Well while I decided to take it back since I am still feeling jolting,rough shifting and some drag in power. Pontiac rep has been working with the dealer, they called last night and perhaps have some "leads", but have no hopes yet.

    Mechanic drove my car to his home 30 miles away, at first saying no duplicate issue, I'm like great!! :( but now there could be acknowledgement that there is an issue as of yesterday! I may se like I'm crazy, bur I know what is wrong and right.

    I also have a G6 loaner and it drives much better, no glitchy drive line! Same engine, but smoother! This will be the 4th G5 car that has been better, I want to be Like duh!! Can't you tell!!!

    I'm so done! Fix it!! Dang how old is this model year?? They should have this down pat by now.

    I want to trade, but I'm too upside down still on
    my lease.

    Hopefully they find a fix, I'm really not crazy, there is an issue. Lol

    I will let you know, hope to get it back today fixed!!
  • bvdj84bvdj84 Posts: 1,724

    I found out the service tech reprogrammed/updated and rebooted the control module that controls the shifting and performance, adaptive learning software.
    They claim to have fixed the issue, could see better results.

    However was not able to drive it much, just down the street to work. I will see tonight after work.

    I'm done! If it's not fixed, I'll live with it. Trade out when I can
  • bvdj84bvdj84 Posts: 1,724
    Well, the result of the reprogram and update has shown better results. It seems to have a bit more power and smoother when going through the power band. The one gear that always seemed to be really harsh at times has tamed down quite a bit Obviously, software cannot change something that is mechanical completely. Some of its mechanical.

    So in result it is running a bit better, doesn't seem like its bogged down anymore. Now this has only been 1 day that I have truly driven the car since I have gotten it back, but it does seem to have improved. I am glad the dealership kept pushing forward to find a fix.

    Also, I did tell them that my brakes were squeaking. They fixed the issue there too! Not sure what they did, but its quiet again.

    For now, I am happy! Hopefully with time, this fix will prove to be the issue that needed done all along. At this point, I am so done with bringing it in. I will seek to get out of the car next year sometime. By then, I will be 2yrs into the lease, so my chances will improve on getting out with minimal problems. I have to let the economy and my car value settle a bit first.

    I love the car, really because of all of its features it packs, and the memories of vacation in it, but this experience alone is enough for me to not choose a GM car again. Not to mention they don't lease anymore, and I am lucky to have a very cheap lease payment for the car I have.
  • bvdj84bvdj84 Posts: 1,724
    So far so good! I think the fix was the solution. However, the one gear that has always shifted more abrupt is still there, but the fix took the edge off of it. So its not so bad. I don't think I can ask for perfection from this car. At this point, I will drive it until I can get out.

    1. Windows not being able to be rolled down (2 times) Fix: a new switch
    2. Rattling headliner- realigned.
    3. Catalytic Converter-
    4. Software upgrade/reboot to the engine management computer.- big improvement.
    5. Brakes squeaked loud at times-Front brakes were glazed, replaced with new pads.

    In my book, this is way to many silly repairs for an 2008 car that now has 20,600miles. All of which took awhile to fix. Not to mention the many times it took them keeping my car before finding the fix. And, its not completely fixed. The engine is not right still. I'll live with it. Most of the issues I had lived with since rolling it new off the lot!! Experience and impression is not good for a car model that should be near perfect since its such and older model.

    I am hoping there soon will be some options for me to get out. But, my trade in value and pay off is still a bit off. It can only get better though.
  • bvdj84bvdj84 Posts: 1,724
    This forum is so

    Anyway, I have an update for those who look here.
    So far after the re-program of the software that manages the engine transmission and power. It is still running much better. Seems to have more power at start, smoother, and it seems to be getting better mileage too! It just doesn't seem like its bogged down like it was before. It actually seems normal. However, the 1 gear that always shifted rough is still there at times, but not so bad anymore. I am not going to push for it to be fixed. I believe this is totally mechanical. I have seen other GM forums with similar issues. Some how they have to be similarly related.

    I am not going to worry about it anyway. I am happy for now.
    However, I am bummed that they dealer never called me after, to see how it was all doing. They probably think I am so annoying customer!
  • I have a 2007 G6 convertible 3.9 L. When I put it in gear (drive or reverse) I hear a metal clank, and sometimes when it shifts it also makes a simular noise. Anyone else had this problem? Thanks Bill
  • bvdj84bvdj84 Posts: 1,724

    I have driven my car for quite a while since getting it re-programmed. It definitely gets better gas mileage. The engine runs more efficient. However, Again, the shifting in the 1 gear is still rough. I think it might be the 2/3 gear. I now consider it to be the actual transmission. It jolts too rough to be normal. LOL, I laugh, because I don't understand how the dealer can't tell that its there now. Perhaps it is now more pronounced then it was. But, it is not intermittent, it is always there. I am not really going to tell the dealer, because I do not want the dealer to keep my car forever.

    I am at a point where, if it goes out or goes wrong well, they'll have to fix it when it happens. It has come to the point where the issue NEEDS to show itself more so the dealer will really feel it. But, what I do know, is that it is more noticeable than it is in the summer, perhaps because of the colder weather.

    Also, keep in mind that the car is a lease, so if I trade it in early if I can with minimal issues, then the new owner will have issues. If I tell them about it before trade, than I am screwed on trade. I DO NOT plan to keep it the whole lease.
    So keep my mouth shut about it, then trade, then tell them later. Sounds bad, but the new owners should know.

    If the car was not having the issue, I could live with the car, I love the car. But truly want out, I dream of having my Accord, Acura, or VW back. It was a bad move on my part. I could have been driving an 08 Passat Komfort, and to think I turned it down because the interior wasn't really welcoming. I would love to have that car. Whatever you do, don't rush into a deal, even if its a beautiful deal! Yes, the dealer sells, VW, Mercedes, Audi, GM products. Make sure the dealer doesn't sugar coat any deal. It it feels off, then it is.

    I am thinking next Spring to trade, by then I will be at 2yrs into a 3 year lease, I should be a better point to get out. I might need real experts to help me out.

    Any advice is welcomed.
  • Hello, I'm new here.
    Seems like GM almost hit a homerun with the G6, except for the tranny.
    I've always bought American ( Chrysler ) and tried to help out GM. I knew the 6 speed manual was a bit clunky but it really was just about the only higher end American car with a stick and thought it would be smoother in time. That is not the problem though.

    After having driven a stick shift for 40 years, I burnt out my clutch on my 2006 with 40K miles. Huh?
    I did drive it harder than usual that day, but nothing like a hot rod, and I've babied it since I had it. I'm 57 years old ! The service rep said I must have been tough on it ... I knew otherwise but hoped it was a fluke.That was over 2 grand. A few days later the car wouldn't shift in reverse. The shifter wouldn't engage. They weren't sure what it was but suspected the plastic in the shifter had worn out and tried a few tricks to get it to work. It did, for one day. Now they are ordering a new shifter. After having read all of these msgs I realize that the 6 speed manual and auto trans is probably a peice of junk. Mine comes from Hungary.
    In other respect it's a great car. I own it and hope to drive it as long as feasible, as I suspect trade in will be unfavorable.
    Thanks for all your input.
  • I know it's been over a year since sabastion7704 posted to this thread but I would like to thank him anyways in case he ever shows up here again. I had been struggling with the same hard shifting problem as many others on here have for about three months and assurances from my trans guy that there are no tranny issues.

    Replacing the Camshaft Position Sensor (exhaust) did the trick and it's smooth as can be now.

    Also thanks to this forum and all the helpful people on it as well.
  • I have a 2005, G6 (standard model) with 67,000 miles on it. Great car until this morning, when i tried to accelerate from a stop and the engine reved and nothing happened. After a diagnostics test ($100) the Pontiac mechanic tells needs the transmission either rebuilt ($2,900) or completely replaced ($3,400). Has anyone else had transmission issues, or know of anyone who has ? My warranty was up in July (of course) so I am in the midst of a battle with GM to pay for this repair! Help if you can! Thank you :cry: :sick:
  • I have an 05 with around 80k miles. Lately when I shift to park the locks won't unlock which is what they normally do. And one day the car really was in park and I rolled backwards...I was on a hill. So today I put the car in park and thot it was, turned off the engine and noticed my locks didn't unlock. Tried to start the car and it won't start now?? Engine light comes in. So basically I shut the engine off when the car wasn't in park I guess....even though it is in park.
  • Did you ever figure this out? The same thing has happened to our 2006 Pontiac G6 GTP with only 46k miles.
  • gonogogonogo Posts: 879
    The cable housing lock clip has been known to break at the transmission on top, can be seen under the hood.
  • i have been having the same problem - the check engine light will pop on, the gears will thump (sometimes quite noticeably), then after a while the thumping will stop, but the light stays on. sometimes i start the car, the light comes on and the thumping starts...sometimes i start the car and all is smooth and no light...what the heck is going on?
    it's an '07 G6 (value) 126,000 miles and i had the o2 sensor replaced 2 years ago...any ideas, folks? i am not in a position to pay for alot of repairs right now.

    thank you, thank you! :confuse:
  • caridcarid Posts: 1
    I have a 2008 g6 gt convertible. I purchased my car with 24k miles on it in Jan 2010. I started having acceleration hesitation in Sept 2010. I took it to the dealership oh so many times. And I could not get it to do it for them. So like you they treat me like I am a crazy lady ! So now in June 2011 I still have the same issue. And now it will hesitate to accelerate and the spin the tires when it kicks in. I took it back to the dealer again today. And they say until the engine light comes on they can't do anything. They said they checked all the codes and it is fine. I wish mine would just hurry up and go out while it is under warranty ! I am now at 64k miles.
  • gmcustsvcgmcustsvc Posts: 4,251

    I apologize for the problems you are experiencing with your vehicle. Have you been in contact with GM Customer Assistance? Could you please email me your VIN? I would like to look further into your situation.

    Thank you,
    Caron, GM Customer Service
  • gmcustsvcgmcustsvc Posts: 4,251
    I would recommend atleast having the vehicle diagnoised by your dealer of choice. This will help you get a clearer view of the problem.
    GM Customer Service
  • nickie0nickie0 Posts: 1
    hey there, i have a 2006 pontiac g6. I've taken really good care of it, and it only had 1 previous owner. I was driving down the road, and all the sudden it wouldn't accelerate. I thought it had to be something electrical because this car has been taken care of and for some reason was thinking g6's should last a lot longer! Boy was i wrong...its the transmission and i'm waiting to get an estimate. I still owe $5000 on this car and it's a piece of junk :( I hope you don't have the same problem as me because i'm thinking it's going to be around $2,000 to fix...good luck to you!
  • gmcustsvcgmcustsvc Posts: 4,251

    I apologize for the problems you are experiencing with your vehicle. Please keep us posted when the issue has been taken care of.

    Thank you,
    Caron, GM Customer Service
  • I own a 2006 Pontiac G6 4C as well. I bought the car used from a dealership and I have had nothing but problems with it since I bought it. Sorry in advance but I dont know technical terms.

    3 days after I purchased the car I had to bring it in as the engine light came on and I was getting clunking noises along with a shudder. Turned out to be the transmission. Now a year and a ahlf later the noise is back and the clunking and shuddering is worse then ever. I am terrified to drive it. Also when you put the vehicle in D from P the whole car shakes and you can hear a grinding/clanking noise coming from the car. I still owe about $6000 on the car and Ive been warned its probably going to cost about $5000 to fix it. :sick:

    I have a squeek comeing from the left wheel well no one can figure out what it is (Routers have been changed multiple times and the wheel mount things arent bent).

    Ive looked online and this seems to be a MAJOR issue with the G6 transmissions. Why is GM or their dealers not dealing with it. :mad:
  • gmcustsvcgmcustsvc Posts: 4,251

    I apologize for the problems you are experiencing with your vehicle. Have you spoken with GM Customer Assistance? Could you please email me your VIN? I would like to look further into your situation.

    You can get my email by clicking on gmcustsvc.

    Thank you,
    Caron, GM Customer Service
  • I just had the same thing happen to me today. first it wouldn't "lock" into park...then a couple of hours later it wont start.....were you able to get it fixed? if so what was the problem?
  • gmcustsvcgmcustsvc Posts: 4,251
    I apologize for your frustrations. Have you spoke to the dealer regarding your concerns? Please let me know what is going on with this. I look forward to your response. Have a great weekend.
    GM Customer Service
  • hapywifehapywife Posts: 8
    edited July 2011
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