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Buick LaCrosse Transmission Problems

245

Comments

  • smarty666smarty666 Posts: 1,503
    sounds a little bit ridiculous for you to be going through this on a brand new car! just shows GM still has not gotten it all together yet! Since your car has been in the shop for over 4 weeks do you not qualify for lemon law in your state? I know in NJ, where I live, it goes by if the same problem has been fix 3 times with no resolution, which you obviously are not at [OR] have the car at the dealership for more than 2 weeks consecutively during the same calendar year, which you might qualify for!

    I hope things work out the best for you! Lots of luck!!
  • fthormanfthorman Posts: 1
    I have an AWD, when leaving my driveway in the morning, on what I believe to be the 2-3rd shift. I have had the trans NOT make the shift!! The engine will free rev, If I let off on the "gas pedal" the trans will than go into the next gear (3rd) and life go's on. This will only happen once in the morning, once every other week. Have had the car at dealership, with the car over night, with out the same problem occuring for them.
  • blimpyblimpy Posts: 8
    I guess all the transmissions problems went away. Would be nice if you guys would list your motor/trans config instead of just LACROSSE.
  • waytoolaidbackwaytoolaidback Posts: 3
    edited September 2010
    Seems like they have a big problem with the tranny! Our 2010 is in the shop with tranny problem and we've only had it a few months. Its been in the shop for thee weeks now awaiting parts that seem to come each time with missing parts in the order claims the service manager. They are paying for my rental but that doesnt cut it for me. Today i called buick customer service and I expect to hear back from my district rep by monday. GM has to know about this problem, and they should issue a recall because something is terribly wrong. Our problem started with the car idling a little high and i let that go but a few days later it didnt want to shift into gear. Finally shifted into gear and heard a loud noise but it drove ok after that. The check egine light came on and onstar reps said it was a transmission code. Took it to the dealer that day and they have been trying to fix it since then. Im pretty fed up but what can you do? Hopefully this District rep tells me something positive. How can you sale cars and know that there will be problems within 2000 miles of leaving the lot. I normally by BMW's but thought i'd give the Buick a chance since it was so nice inside and out, I will not let GM lure me in like that again. UPDATE TO COME!
  • Seems like they have a big problem with the tranny! Our 2010 base model is in the shop with tranny problem and we've only had it a few months. Its been in the shop for thee weeks now awaiting parts that seem to come each time with missing parts in the order claims the service manager. They are paying for my rental but that doesnt cut it for me. Today i called buick customer service and I expect to hear back from my district rep by monday. GM has to know about this problem, and they should issue a recall because something is terribly wrong. Our problem started with the car idling a little high and i let that go but a few days later it didnt want to shift into gear. Finally shifted into gear and heard a loud noise but it drove ok after that. The check egine light came on and onstar reps said it was a transmission code. Took it to the dealer that day and they have been trying to fix it since then. Im pretty fed up but what can you do? Hopefully this District rep tells me something positive. How can you sale cars and know that there will be problems within 2000 miles of leaving the lot. I normally by BMW's but thought i'd give the Buick a chance since it was so nice inside and out, I will not let GM lure me in like that again. UPDATE TO COME!
  • e_net_ridere_net_rider Posts: 1,380
    I am certainly hoping that you are the few with tranny problems. As to the third gear thing, 09 Malibu has issue. It is mostly a colder weather thing during the first couple of shifts. It has a long delay going into third when second is released. It feels like it is slipping, third clutch taking too long to fully engage, and the tachometer shows just that. AFAIK, this is the same tranny. It might have slightly different parts in some areas for controlling shift and also computer programming may differ some. Build would have been prior to AUG 09.
    This worries me because it could be indicative of a problem leading to destruction of tranny. It might be indicative of an internal leak where there is no longer enough fluid flow to certain parts to build adequate pressure. Many of the circuits are in parallel and this could result in premature wear to bearings, gears, etc.

    The part delay may not be unusual. Stocking parts is no longer a common practice.
    If GM has determined the source of the issue, then they go back to transmission builder and then it moves on to their parts supplier if it is a manufacturing flaw. If it is a design flaw then you get a much larger circle of departments involved to come up with the fix.
    Supposedly, every transmission leaving the build sight gets a runup test before being shipped to GM final line, vehicle assembly. I suspect they are not doing cold soak or hot run tests.
    Older transmissions with lots of miles often displayed the first signs of failure by being slow to engage until they warmed up. Excess wear, cracked metal or rubber parts would cause internal leakage not allowing enough pressure to build.
    If there has been a part change the transmission builder will get the new parts first.
  • Hello, there is a service bullitin out on this and from what I can see the problem is with the 2nd and 4th gear clutch pack in the transmission, do not wait for the mileage specefied for trans oil change as this will make things worse as the oil will turn to mud, my 2006 started early with the hard shifts occasionally and now at 73000 miles and no more warranty the trans is really bad, just a matter of time before the big expense will hit, I am really disapointed other than this this has been one of the better GM cars I have owned but will not buy another.Mine is the Canadian version Allure.
  • Interesting problem. Our Lacrosse is about 2 months old. We noticed from the beginning that the transmission acted odd. When decelerating the gear shift around 30 was not smooth. The car actually felt like it was applying the brakes. When the shift occured the tach would rev the drop dramatically.

    This is not the smooth transition that we are use to in a buick.

    The car has been to the dealer twice. Once for the first oil change and once for the trany. The technition believes that the calabration is out of sync. After the tune up it seems a little better but the problem is not completely resolved.

    It will need to be watched.

    That said, the car seems to operate well in every other aspect. Acceleration is fine and the ride is smooth and quite.

    It is just this nagging hicup in the gear change at 30 mph.
  • e_net_ridere_net_rider Posts: 1,380
    I'm not sure why but newer vehicles seem to have eliminated the over-run clutch in transmissions so that even in drive engine braking is compelled. Older vehicles often needed moving from drive or OD on the selector to start engine braking.
    To me it would just make more sense to coast as far as possible and not bring engine braking into play unless perhaps the brake is applied.
  • gmcustsvcgmcustsvc Posts: 4,057
    curtsinthezone,
    Please keep me updated on your situation.
    Christina
    GM Customer Service
  • e_net_ridere_net_rider Posts: 1,380
    I hope it is not a problem per say. There were similar complaints on Malibu as well as other pertaining to shift. I and some others came to the conclusion that the computer learns driving habits and self programs accordingly. Perhaps you are doing quite a bit of stop and go driving or have been recently? This style would seem to bring automatic downshifts more forcefully. If you drove where most of the time you were doing a long roll to the stop with only light braking near the actual stop it seems to use less forceful downshifts. I have yet to figure why they don't use an over-run clutch which would maximize the rollout and MPG.
  • crankeeecrankeee Posts: 297
    Rider: Since our 94 pontiac B'ville we have noticed engine braking on hills where the car would "hold" the same speed for the most part. Very noticeable on newer vehicles i.e. 2010 Lacrosse. Personally, maybe due to getting used to it, I like the programming feature since you do not have to ride the brakes (in the smokies and on the Wheeling, WV Hill). Prior cars we did have to pull it down to a lower gear- like a manual to brake with engine. I agree it may help m,mileage by coasting but at what speed?
  • e_net_ridere_net_rider Posts: 1,380
    I generally don't ride in very hilly or mountains. Older vehicles with override clutch would positively engage when pulled from D(OD) position. It seems these 6 speeds are not as good at engine braking when applied. Even pulling down a gear or more they are hesitant to engage depending upon speed and engine RPM, so it is necessary to apply brake to get you within the allowed range for that gear. That is if you want effective engine braking for a high grade.
    Obviously coasting without engine braking should help MPG at any speed, assuming the engine efficiency is not horrible at idle. Rollout of newer vehicles can be very lengthy without any braking. A tap of the accelerator can move you a long way. This is much the principle that those who competed for most mileage on a vehicle used in contests. Most did use standard transmission, but once they got it rolling at the desired speed, they'd clutch and kill engine, allowing a long rollout. When speed decreased to the desired point, they'd pop clutch and restart to increase speed again. There are some that competed locally and got 100 miles on a gallong.
  • crankeeecrankeee Posts: 297
    edited March 2011
    Newer , jointly developed 6-speed is obviously programmed for economy preference with fast upshift and slow to downshift in my experience. We use the tap up tap down for really big grades, but as you have posted the new on board diagnostics appears "to learn" your driving mannerisms and the car becomes gradually easier to drive IMO. I have read about flashing or reprogramming certain transmissions and computers to take out the initial bugs (we had it done once and that car was very driveable and economical forever after. Big key with the Lacrosse 6-speed and the higher revving 3.0/3.6L DOHC engine family is to keep the RPMs up on big hill climbs. At 80 MPH, the car will climb all but the steepest, at 70 it lugs due to lower RPMs and as speed drops off it shifts down and then back up searching for economy. Very frustrating to some drivers who do not use tap system at all. At 55-65 the car gets phenomenal MPG (31-33) on level road if gas gets to $5 that may be tolerable. BTW- per new oil change forum -what interval are you using?
  • e_net_ridere_net_rider Posts: 1,380
    My opinion of the engine braking is that it is not very good on this vehicle. I was reminded of that yesterday as I cruised back across the Savannah River. A very high bridge allowing largest containter ships. As you come to the bottom and exit into Savannah, there is a 25MPH curve. As I crested I started downshifting, all the way to 1st. Engine was revving quite high and it was not slowing me much so I still had to brake a lot. I suspect that it has to do with VVT and that it is not moved to an engine brake solution. That is it is more like a diesel when coasting until you employ the Jake as far as engine braking. On the 3.6 it might be for pollution reasons or they just did not add effective engine braking timing to the valve train.
  • e_net_ridere_net_rider Posts: 1,380
    This is a very old post I'm replying to, but felt it necessary.
    There is some discussion about replacing older transmission fluids with the newer Dexron VI synthetic. By now dealers should know, but DIY may not be aware.
    When the newer first came out it was listed as backwards compatible but Ford & GM apparently had enough issues that they came out with a bulletin saying not to do it. The apparent issue was that clutch plates started coming apart on older transmissions, pre- the year that they started coming off the line.
    It is possible the newer transmissions had new clutch plates or that it is the effect of having previously been worked and soaked in the older formulation. If it was the plate construction, presumably newer synthetic compatible plates would be available for rebuild, at least in transmissions that spanned the changeover.
    I did get by with a change from whatever was in the 96 Aurora transmission at 125K to AAMCO synthetic, off the shelf. I drained, filled, then disconnected cooler line to allow it to pump new fluid from pan forcing old from torque convertor out the disconnected line. I'm sure I got at least a 90% change. And I saw no bad from 20K miles, except the solenoids seemed to be going bad which was common with older fluid.
    Although this was occurring around the same time that most transmission shops would not change fluid if you were around 70K and had never done it before, I do not know if changing to synthetic influenced that decision.
  • mary101mary101 Posts: 1
    Hello everyone, I have recently purchased a used buick with now around 83,000 miles on it. Now I have had the car around four months and I do have a lot of stop and go traffic as well as been driving long distance. When I first got the car I had to do a few repairs but nothing major. But I did notice that sometimes shifting seemed unusual. I took it and had a diagnostics test done, but they said nothing was found. However now it seems to be getting worse and I do not know which way to go or where to start with trying to figure out the problem. When stopping and then starting to go it seems like it is struggling and then the first shift is really hard and jerks the car after that the second shift is rough to but after it hits about 35 to 40 it runs smooth. Please anyone with any suggestions will be of appreciation. I am really worried and can not afford to lose this car right now so I am trying to figure out the best wa to go. Thanks.
  • e_net_ridere_net_rider Posts: 1,380
    Did you take it to dealer or transmission shop?
    I'd say it needs a proper diagnosis from either.
    There are so many parts in a tranny and they need to work together. The hard shifts could be from a programming problem or something as simple as a sensor. But the sensor might be really hard to get at.
    You might want opinions from both.
    That is not an excessive amount of miles, but fluid and filter should have been changed before this point. I'm not talking flush, just drop pan, change filter, and refill. However, if fluid looks and smells bad it is likely too late.
    Some transmission shops have hand-held units they can hook up and monitor while driving and they can be very good at locating issues. They would pinpoint if the computer is delaying the shift or if the command is sent to tranny and for some reason internal to tranny there is a long delay. They can give live info on pressure regulation and temp sensor.
    The big question, is it the tranny or the computer or some engine sensor. If the computer has ever been replaced, it needed programming to your vehicle. Or maybe just re-programming.
    Good Luck.
  • trouble20trouble20 Posts: 1
    I have a Buick Lacrosse 06 purchased new. Problems occured with the transmission four months after. The very hard shifting jerks was between 1.5 and 2 on the RPM. Dealer couldn't find problem. My car was under warrenty plus an additional warrenty coverage that I had purchased. I spent more time at the dearlership over the past few years regarding this problem. When this occured again,and not the last with the odometer reading 65 thousand miles the dealership informed me that they still couldn't locate problem. I was at a local mechanic for an oil change and briefly mentioned the problem. He went to a technical web site which stated that this model bulletin was sent out in March, 2008. The bulletin number I have is 08-07-30-002A. I took the printed copy to the dealership when the warrenty for GM was about to expire because the transmission started to shift hard again and they rechecked and the same answer no problem. That extended warrenty that I had mentioned earlier I was told by the dealer it ran concurrently with the GM coverage. Now that the car is out of warrenty the shifting is worse and the car will be engaged and not move while the RPM excellerates and the spedometers stays at 0. Then the engine will engage. Good luck
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