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2003 Buick Rendezvous Transmission will not shift under loa

Tiny
RMELLONE
  • MEMBER
  • 2003 BUICK RENDEZVOUS
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 57,000 MILES
When I drive the car with no load it shifts fine, once I put any weight in the car the transmission will not shift out of 2nd gear. I checked the fluid level and it is fine. It shows that I have a sensor problem when I have taken it in. I would like to know if changing the sensor will fix the problem
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Friday, November 7th, 2008 AT 11:23 AM

5 Replies

Tiny
JNOVACK
  • MECHANIC
  • 723 POSTS
What sensor is it showing there is a trans control selinoid and trans control module that controls the shifting also the speed sensor
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Friday, November 7th, 2008 AT 11:33 AM
Tiny
RMELLONE
  • MEMBER
  • 3 POSTS
I think they said it was number 1 sensor.
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Friday, November 7th, 2008 AT 11:43 AM
Tiny
JNOVACK
  • MECHANIC
  • 723 POSTS
It sounds like the 1st-2nd shift pressure valve selinoid that needs to be replaced
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Friday, November 7th, 2008 AT 11:57 AM
Tiny
RMELLONE
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  • 3 POSTS
But why would it only fail when there is a load in the car and any other time it works fine
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Friday, November 7th, 2008 AT 12:01 PM
Tiny
JNOVACK
  • MECHANIC
  • 723 POSTS
Because it senses an increase of pressure and with the execes pressure it fails
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Friday, November 7th, 2008 AT 5:49 PM

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