Question about 2003 Buick Rendezvous

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2003 Buick Rendezvous Transmission Problem. Because of slow shifting, I had the transmission filter changed 6 months ago at 99,000 miles I also had put in some chemicals to help with the same problem. At 112,000 last weekend while driving 150 miles to Dallas, we got into stop and go traffic and the tranny would shudder hard at each shift point. The next morning I took it into a GM dealership and had the transmission completely flushed and put in new fluid, {$148.00} . It drove home great. Next day,back in our hometown, it had a slight slip. It still has that slight slip aprox. 25% of the shifts. I cannot afford a rebuilt tranny. I think I need to change the filter again. Or a mechanic in a can would be even better.

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  • John Haydon Nov 11, 2010

    I will change the filter, but I also would like to know a chemical I can put in to make it shift harder.

  • John Haydon Nov 11, 2010

    Is there a good chemical to put in my transmission to help it shift better

  • John Haydon Nov 18, 2010

    Thanks Joe. AAMCO and others that scan your computer, does it tell them about the transmission. Does it say tighten bands, sticky valves, or bad torque limiter. Just exactly what can you learn from a scan? Is the one that Advanced Auto tell you anything that I need to know
    Thanks again
    John

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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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No, you do not need another new filter. The GM dealer that "flushed" your transmission should have replaced the filter at that time, and your transmission should still be clean inside. You might prolong a rebuild or help the shifts by replacing the fluid with a Lucas brand fluid. You can change / drain and refill your fluid yourself or have a friend do it much cheaper than a dealer or a local shop. Who, once you say "slipping" will try to sell you on a rebuild and will pressure as much as they can to make the sell. Transmissions scare folks and shops play (or prey) on that to "create work" . Put no undue strain on your trans. drive as careful as you can, let of the gas as it needs to shift so you are not pushing the shift but let it happen. Make each trip count and consolidate your trips so as to keep the transmission cool as you can, heat shortens a transmissions life. This is all the advise I can give. Hope this helps.

Posted on Nov 11, 2010

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Hello. If you have an AAMCO transmission shop in the area, go there for a free estimate and a free scan of your car's computer. You may learn that the cost of repair is within your budget. For instance, you may just need to have the transmission bands tightened up. Joe

Posted on Nov 11, 2010

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