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Buick LeSabre Transmission

57 messages,  Last post on Oct 01, 2009 at 6:28 PM

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#8 of 57 1995 Lasabre Custom Dynoride-Trans Slips by dee41 Feb 01, 2007 (7:54 pm)
Has over 100,000 miles. Runs nice and smooth, But will slip when going from 1st into 2nd, will shift fine going from 2nd into 3rd, but will slip some more while in overdrive,or when i push the gas and reach between 50mph and 60mph,It kinda gives a feel as if the car is in neutral. when I let off the gas a little it will then go back into gear again.... Reverse works fine as well. Dose these mean my transmission is going???
#9 of 57 Buick transmission code P0742 by keithh1 Jun 05, 2007 (11:36 am)
'97 Buick LeSabre. Bucks at low speed during warm weather but not during cold weather. Throws a code (P0742). Sounds to me like the TCC solenoid. How hard is this to replace? I've done it before on the TH200-4R, but that's a RWD trannie. Is it as simple on the FWD trans? Could the bucking be unrelated? Replies to this message: imidazol97 (Jun 05, 2007 12:43 pm) duddly101 (Jun 11, 2007 5:50 pm)
#10 of 57 Re: Buick transmission code P0742 [keithh1] by imidazol97 Jun 05, 2007 (12:43 pm)
Replying to: keithh1 (Jun 05, 2007 11:36 am) Have you changed the transmission fluid? I do mine every 36K miles approx now. I do it myself and change the filter every second change.   New fluid may unstick the solenoid. It sounds like it's sticking occasionally since you don't mention it happening everytime you slow down...   I'll check my 98 service manual and see if it's an easy change while changing the fluid and filter...
#11 of 57 Re: Buick transmission code P0742 [keithh1] by duddly101 Jun 11, 2007 (5:50 pm)
Replying to: keithh1 (Jun 05, 2007 11:36 am) I had the same problem last year. I have a 01 LeSabre, and replaced the transmission,95k, after being told the TCC would be as expensive to repair than to replace with a warrantied tranny. That didnt fix the bucking. In fact it was worst between 25-45 mph with the new tranny. Had it back in, and they reset some codes which were not reset earlier. Still didnt fix the problem. I stumbled upon a posting somewhere that the Mass Airflow sensor can be the culprit. It is an easy DIY, the sensor was 160 bucks at Autozone, with exchange. I replaced mine right in the parking lot. You might get by with cleaning it with electrical solvent, but didnt work for me. Hope this helps.
#12 of 57 chattering when making left turn by moonglade Jun 19, 2007 (5:03 pm)
I have a 98 LeSabre 3.8 with close to 100,000 miles. When I turn left from a standing start, I get a chattering and bucking, like the drive axle is engaging/disengaging rapidly. I can avoid this by going really, really easy on the gas. Any idea what this is and how to fix it? Replies to this message: imidazol97 (Jun 20, 2007 4:25 am)
#13 of 57 Re: chattering when making left turn [moonglade] by imidazol97 Jun 20, 2007 (4:25 am)
Replying to: moonglade (Jun 19, 2007 5:03 pm) Could be lots of things. I'd have to feel what it's doing by driving to guess where to start looking.   It could be a motor/transmission mount allowing movement causing the car to feel like it's quickly speeding up and slowing. It could be a drive axle constant velocity joint (you don't mention the right kind of noise sound though) It could be the differential in the transmission. It could be the transmission.   Does it do it if you put it in 1 and start up? Or in 3 (uses a clutch pack instead of the regular overdrive setting start.   Have someone move car in a parking lot with hood up while you walk beside it to watch for movement in the whole motor/transmission unit.   With car jacked up and jackstands look under at the motor mounts and transmission mount.   I think the fact it only does it turning left is a sign. I think that the low torque of a gentle start is a sign. My vote is motor mount...
#14 of 57 1870 code by odysseus5 Jul 13, 2007 (3:10 pm)
My buick lesabre 1997, is hesitating and when i give it gas (especially on the highway) sometimes it does not react at all. I have to coast to allow it to run properly. My check engine light is on and the code is 1870. As i said after taking it easy, it usually runs fine afterwards.
#15 of 57 2001 Buick LeSabre transmission problem by musicgirl Sep 09, 2007 (1:16 pm)
Vehicle has 54,000 miles, has had the transmission rebuilt this summer. Vehicle will not down shift into low from dead stop. Starts in 2nd or 3rd gear. Have had 2 solenoids replaced, transmission reprogrammed, battery regrounded. Problems still persists. This is a random problem occuring on a weekly basis. It will on a rare occasion lurch into gear. I can manually shift this into low gear when this occurs and then it will go normally. Looking for any advice. Local mechanics have no idea where to go with this.
#16 of 57 93 Lesabre trans problems by wanger1 Dec 10, 2007 (5:30 am)
I have a 93 Lesabre with 169,000 miles on it. The trans starting jumping out of gear as you come to a stop about 4 weeks ago. It only does it in low gear as you stop. Not ever time, but pretty regular. (6 to 8 times a week) I ran a can of sea foam through it for about a week and then serviced it. The filter was pretty dirty. It did ok for a few days and then began to jump out of low gear as you stop again. It acts like it's loosing prime, especially if you make a quick stop. Sometimes it makes a difference when you stop gently and sometimes it doesn't make any difference at all. It still does it. Could this be caused by the control solenoid or do I have another problem? Other than this the trans does not slip and shifts perfectly. It has no hesitation when going into gear.                                                                                                 Thanks, Mike
#17 of 57 2005 Buick Lesabre by barbara13 Dec 30, 2007 (5:28 pm)
When coming to a stop and then starting again the car bucks until it goes into overdrive. Then is fine until another stop is made at which point it may buck one or even two times. The car has about 84K miles. Please help Replies to this message: imidazol97 (Mar 15, 2008 9:25 am)

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