Question about 2003 Buick Rendezvous

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2003 BUICK RENDEZVOUS TRANSMISSION -SLIP BANG ON 2-1 SHIFT COLD

This truck did this last winter and has been fine all summer. Now that the cold weather is here agin it's back. The truck put on about 8,000 Km over the summer without a hint of the misbehaviour. When you are coming to a stop but don't wait until you feel the downshift into 1st gear before you accelerate again (rolling stop), it will rev (like in Neutral) and then bang into 1st gear. The problem disappears after about 5 minutes of driving but returns after a cool off. Has about 175,000 K on it. No codes ever set or stored. The fluid is up and clean. Never been flushed. No other trans related concerns ie. slipping or harsh shifts Are there any known issues in these transaxles that cause this behaviour? Is it repairable short of a full rebuild?

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Posted on Jan 02, 2017

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drsinister69
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SOURCE: 2003 Buick Rendezvous Transmission Problem.

I would try changing the filter, I've seen some that should be changed every 20,000 miles. You might want to check for any DTC codes stored for the transmission. Auto Zone will do it for free. If there is a code that might point you in the right direction.

Posted on Nov 08, 2010

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emissionwiz
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SOURCE: 2004 Buick Regal transmission slips

Hello
At this mileage the transmission is worn out, the hydraulic seals inside the transmission are as hard as a rock and you are loosing fluid pressure, this is what is causing the problem you have. There is one product that might prolong the rebuild, get yourself a bottle LUCAS OIL brand "Transmission Fix" of all the products I've used over my 45 year career this one does work if the transmission is not to far gone, here is a description of the product from their web site.
Lucas Transmission Fix is a non-solvent formula that stops slip, hesitation and rough shifting in worn transmissions and completely eliminates most seal leaks. Use in any transmission for preventative maintenance.


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Posted on Mar 10, 2011

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