2005 lesabre trans problem

[Guest T. Price]

   I  have a strange problem with my 2005 Buick Lesabre transmission.  If starting from a stop with normal to moderate acceleration it will jerk hard as if it was out-of-gear and was jerked into drive.

    If taking off very slowly it does not jerk.  Two different transmission repair shops  seem to have no answer to the problem.

      Does anyone except me ever experienced this problem ?

   One mechanic says that he fixed a buick doing the same think several years ago, but he can not recall just what he did, however, he said that he remembers the fix was very unconventional

(  not something that would be expected to cause this problem ).

 

thanks:  T Price

   

 

[Larry Schramm]

Look here.

 

https://www.google.com/?gws_rd=ssl#q=2005+buick+lesabre+transmission+problems

[Dave Henderson]

Sounds to me like a case of low fluid pressure which is abnormally slow to build up, requiring a higher rpm before low gear is actuated, thus causing jerking when it engages under stronger acceleration.  Perhaps caused by a leaking seal or o ring. 

[60FlatTop]

Have you replaced the spark plug wires?

[padgett]

My first stop on any GM 4Txxx trans is to add a can of Seafoam Transtune (available at most FLAPS) and just drive a bit. Could be a sticking shuttle also (had a 4T60E do that) and the Transtune may fix.

[Digger914]

6 hours ago, T. Price said:

   I  have a strange problem with my 2005 Buick Lesabre transmission.  If starting from a stop with normal to moderate acceleration it will jerk hard as if it was out-of-gear and was jerked into drive.

    If taking off very slowly it does not jerk.  Two different transmission repair shops  seem to have no answer to the problem.

      Does anyone except me ever experienced this problem ?

   One mechanic says that he fixed a buick doing the same think several years ago, but he can not recall just what he did, however, he said that he remembers the fix was very unconventional

(  not something that would be expected to cause this problem ).

 

thanks:  T Price

   

 

 

If your Lesabre has traction control turn it off and see if it makes a difference, you could have a drive axle going bad.

[padgett]

ps solenoids in an "E" trans are what move the shuttles. Sounds like throwing parts at a problem.

[Guest Skyking]

I've had the same problem with my 2000 Century.  It's the pressure control solenoid failing.  It happened mostly when the transmission heated up.  I had it replaced at a Buick dealership @ 75,000 miles along with a front end alignment at a cost of $1100.00 back in 2005.  Now the car is retired at my Florida residence and at 135,000 miles it's doing it again.  I did add a radiator coolant product that helps eliminate the problem.  It seems to be an ongoing GM problem with cars of that era.