Last post on Nov 15, 2013 at 5:26 PM
You are in the Buick LaCrosse
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Buick LaCrosse, Transmission, Sedan
Apr 24, 2012 (10:01 pm)
About 6 weeks ago I traded in my 2000 Monte Carlo with 220,000 miles in on a 2008 Buick LaCrosse Super. Partly because I feel in love with the LaCrosse as soon as I saw it but mostly because I didnt feel my Monte was very reliable anymore. Tomorrow I am taking the LaCrosse into the dealership for the second time since I bought it 6 weeks ago. 1st time was because ABS light coming on. This time will be because three times now, when I would start to car and put it in drive, it wont move. Almost like the parking break is on. If I turn it off and then back on it seems fine then. Or I will go thru all of the gears and then its fine. Once I get it going is usually fine. Onece it lagged on the freeway as I was excellerating but thats it. No hard shifts at all. Has anyone else had a similar problem with this generation of LaCrosse? Im starting to think I may have been better off keeping the 200,000 + mile Monte.
#75 of 98 Re: Go nowhere [lacrosse2008]
Apr 25, 2012 (4:50 am)
I'm sorry that you've had to make a few trips into the dealership already since getting your LaCrosse. I hope that this trip is successful! If you would like for us to follow up with the dealership on your behalf, please let us know!
GM Customer Service
#76 of 98 Re: Go nowhere [lacrosse2008]
Apr 25, 2012 (5:04 am)
> LaCrosse into the dealership for the second time since I bought it 6 weeks ago. 1st time was because ABS light coming on. This time will be because three times now, when I would start to car and put it in drive, it wont move.
You say "dealership." If you bought it from a GM dealer or any other dealer, did it come with a short warranty period? I would get the transmission checked. This sounds more like a major problem. They should have known about this, because they would have started it cold when someone moved or a customer wanted to see the car and drive it. This is why salesmen go get the car and bring it around for customer to drive. If the customer were there, and something is not right when the car starts, tapping engine or bad transmission, the customer sees the problem.
Check into what warranty or rights the purchase has given you. Be sure you have a documentation from the first time you complained to dealer about the trans problem if it was within a 30-day period, e.g., of their warranty even though you are outside now. My uniformed guess would be the pressure control module inside the trans or a major seal that is worn and holds pressure after a little warmup.
#77 of 98 Re: Go nowhere [gmcustsvcsarah]
Apr 28, 2012 (9:30 pm)
#78 of 98 Re: Go nowhere [imidazol97]
Apr 28, 2012 (9:33 pm)
Luckily it is still covered under the powertrain warranty so no out of pocket expense. From the time I started it and test drove it at the dealership and all the way up till just a week ago, everything was fine. After an initial check out, they believe they know what the problem is but had to order a part so Im dropping it back off in a couple of days and they are giving me a loaner. Hopefully they are correct in what they think the problem is. I'll provide an update once I know for sure.
#79 of 98 Re: Go nowhere [lacrosse2008]
Apr 30, 2012 (3:21 am)
It would seem irrational for a known type of problem to exist for such a long period of time, but I've seen it happen before in the GM line. That is that the electric control solenoids are part plastic which deteriorates with time and suddenly you get your result.
But there are many other possibilities with the complexity of an automatic transmission.
I just looked backed at your first post. A Super. Exactly the transmission I was thinking of. My Aurora was doing exactly that when I decided it was time to say goodbye. That '96 also had an issue with ABS/ABCM, the brake control modules and other electronic parts being eaten by electric spikes created when the cooling fans relays would make and break. Simple fix was a short jumper harness containing diodes to clamp those spikes. I would never believed that the issue would re-surface in an '09 Malibu. Same exact fix and I was having issues related to the ABS/TCS/ESC, along with others and got rid of it.
Next was an 11 Lacrosse CXS with more problems than I can count from memory. Some of them were electronic and on both the Malibu and it, there were intermittant brake issue which could have been caused by that same control system, the ABS/TCS/ESC. Just before turning it in, as a curiosity, I looked for those diodes in the cooling fan circuit. They were not there. I did not bother to check if there was a bulletin about the Lacrosse concerning this because I was already turning it over.
I'd definitely check your vehicle for related TSB. That spike can kill many things, not just that particular module. It will eat the first weak spot it comes to. And jump on to data lines. It could even be the source of the reason for having to reboot the system. You know, that pull over, turn vehicle off and restart.
#80 of 98 Re: Go nowhere [e_net_rider]
Apr 30, 2012 (9:36 am)
I believe the 6-speed autobox used by GM in these cars was co-developed with Ford. So your Lincoln may have the same issues in time. Enjoy.
#81 of 98 Re: Go nowhere [lacrosse2008]
May 05, 2012 (10:08 am)
Update....They replaced the control valve body, plate and valve. Its been a few days and so far the problem seems to be gone. Only time will tell I guess.
#82 of 98 Re: Go nowhere [ab348]
May 06, 2012 (4:36 am)
We are talking about a Super. From my recollection, the Super has the NorthStar Aurora engine V-8 coupled with a 4 speed box. It might be the same tranny used in Impala SS, but definitely in a few Cadillacs.
I see the fix, replacing the valve body. Again from recollection, the valve body is in the bottom of the tranny so I would consider that a good fortune that they did not have to drop the tranny for the repair. My personal observance is the more they have to take apart the greater the chance of something going wrong resulting in later problems. A bit like Murphy's law.
Valve body, plate, and valve. The valve I mentioned in earlier post as being a known problem, that would be this valve. Certainly easier than dropping whole tranny to get at, but it requires removing the valve body to get at it.
I hope that is the end of your trouble. At least from what I've heard, they finally got a rear engine seal that holds on that engine. Third change seems to have worked and that is a blessing. No easy job to change on the Aurora engine. The engine is of a special design and to replace it, you not only had to remove transmission from it but split the block at the crankshaft holes.
Do make sure that proper oil fill is done at changes. Because of that rear seal blowing out, GM reduced the amount of oil by 1/2 qt to an even 7 qts. They did not change the dipstick, so when at proper level the stick always showed a 1/2 qt low making it easy for some to inadvertantly overfill.
I am unaware of late changes if they occurred so you might have a bit of digging to find facts. That is they may have changed the fill quantity after they found a seal that holds, or not. They may have eventually changed the dipstick to reflect accurately, or not.
My opinion of that engine, pretty high tech for its release. Also powerful for then and very smooth. Downsides seem to be that it can be finicky as many Aurora owners found. Many who used aftermarket parts developed further problems and the fix most often was to replace with OE parts. Earlier years of it required premium and to short change that often led to spark knock. The sensor system was likely not as accurate as today's system. Spark knock, very bad for engine. Also it usually led to decreased mileage which offset the price difference and it definitely hurt performance.
I was saddened slightly by Cadillac's decision to drop the engine instead of updating it for the next generation. That would be moving it from the 32 valve to VVT and changing it to DI (direct injection). At least it would have been a very interesting comparison to the Corvette Mercury Marine V-8.
Does yours have an oil cooler?
#83 of 98 Re: Go nowhere [e_net_rider]
May 08, 2012 (8:12 pm)
Actually no. The Supers have the small block LS4 that are also used in the Gran Prix GXP and Impala/Monte Carlo SS. The Lucerne Super however did come with the Northstar. I'll continue to know on my simulated wood on my dash that the problem is solved.