Last post on Nov 15, 2013 at 5:26 PM
You are in the Buick LaCrosse
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Buick LaCrosse, Transmission, Sedan
#37 of 98 Re: Reply: 2010 Buick LaCrosse Engine Braking[e_net_rider] [crankeee] [e_net_rider] [crankeee]
Mar 13, 2011 (7:48 am)
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.
#38 of 98 Re: Replace transmission filter or flush [mrrogers]
Mar 31, 2011 (5:37 am)
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.
#39 of 98 Buick Lacrosse Cxl 2005
May 21, 2011 (3:56 am)
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.
#40 of 98 Re: Buick Lacrosse Cxl 2005 [mary101]
May 21, 2011 (4:23 am)
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.
#41 of 98 Re: Buick Lacrosse Cxl 2005 [mary101]
May 21, 2011 (8:00 am)
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
#42 of 98 Buick LaCrosse Transmission Issues
Nov 07, 2011 (5:17 pm)
I have had two incidents where my 2010 Buick LaCrosse has stopped cold. The first time I was at a gas station. I finished pumping gas and when I went to start the car it would go no faster than 5 mph. It then shut off. I was driving on a busy highway at about 70 mph and the car shut off. Now the car is having issues with the powersteering and leaking. The car only has 33K miles. Has anyone else had these problems?
#43 of 98 Re: Buick LaCrosse Transmission Issues [lefttoyota]
Nov 08, 2011 (9:05 am)
Iím sorry to hear about these incidents with your LaCrosse. Are you currently working with a dealership towards resolving your concern?
If you like, Customer Service is available to help you work with your dealership towards a resolution, or to look into warranty/recall information on your specific vehicle. Please email us with your name/username, contact info, last 8 digits of your VIN, and involved dealership.
GM Customer Service
#44 of 98 Re: Buick LaCrosse Transmission Issues [lefttoyota]
Nov 12, 2011 (7:06 am)
I am having a similar problem with my 2010 LaCrosse , but with mine the car after being on for a lil while goes into a parking brake mode. The engine light turns on, the parking brake light turns on and the car slows to 1 mph. Sometimes before this happens the doorlocks go nuts rapidly going up and down.
I video'd the park brake problem on my iphone and posted it to show the dealer whom has tried to fix it 3 times.. My next move is lemon law because it is a potential danger to drive with my family on the highway.
heres the link..http://youtu.be/tVtKRS2v2Sg
#45 of 98 Re: Buick LaCrosse Transmission Issues [buick55]
Nov 15, 2011 (10:26 am)
I see you're already working with a dealership - are you planning on revisiting them again? If we can be of any assistance, please don't hesitate to contact us via email (send your name/user name, last 8 of your VIN, contact information, and the name of your dealership).
All the best,
GM Customer Service
#46 of 98 Re: Buick LaCrosse Transmission Issues [buick55]
Nov 18, 2011 (1:23 pm)
Each time my car shut off, the car displayed similar actions as shown in your video. Tthe engine light came on, the park assist would turn off and then the car shut off. The best experience of all was calling the Buick customer care to get the car towed. I was told they would tow the car to the nearest dealer which was not near my home and I would "have to get myself home". I called the dealer for assistance only to get nowhere. So I am sitting in a parking lot after rolling the car off a busy freeway. No one seemed to care that a brand new car had just stopped while I was traveling over 60 miles per hour on the freeway. And then to be told to find myself a ride home was a bit more than I could stand. It amazes me how excited they are to sell you a car but show no ownership when the car has a problem. I guess I should be grateful I did not lose my life.