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2004 Buick Rendezvous transmission slipping on take off

Tiny
PEBO2336
  • MEMBER
  • 2004 BUICK RENDEZVOUS
  • 6 CYL
  • AWD
  • AUTOMATIC
  • 82,000 MILES
Sirs,

Recently after a long drive (over 100 miles) my transmission shifted very rough (noticable clunk). I took it to a reputable transmission shop and changed the fluid and filter. They also said my transmission showed code #1811. Since then it occasionally skips or hesitates when accelerating ( about every third time). Any ideas other than replacement?
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Monday, March 24th, 2008 AT 9:28 AM

3 Replies

Tiny
DENNYP
  • MECHANIC
  • 1,823 POSTS
Sounds like it's time to rebuild it. It probably has a bad input clutch piston and piston seal.
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Saturday, March 29th, 2008 AT 6:20 PM
Tiny
KRUSZE2
  • MEMBER
  • 5 POSTS
I am a GM/ASE Certified Trans Tech, with 12+ years experience. Your P1811 Code is for the Trans Pressure control Soleniod, which controls the transmisson line pressure. When the code sets, it commands line pressure to max, and also sets all the transmisson shift adapts to max therefore givng you the harsh and delayed shifting. With only 82000 on your vehicle, I would recommend having a new soleniod installed, usually around a $700 repair at most GM dealerships, once the repair is done, and the transmisson adapts are reset, and code is cleared, you should be as good as new again
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Sunday, April 6th, 2008 AT 11:24 AM
Tiny
DENNYP
  • MECHANIC
  • 1,823 POSTS
With 82,000 miles, it would be a wise investment to spend 2,500 for an overhaul rather than 700-1,000 on a solenoid.
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Monday, April 7th, 2008 AT 7:17 AM

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