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Automotive Column 1 from Under The Hood Transmission Fluid

Automotive Column 1 from Under The Hood Transmission Fluid

Syndicated Newspaper Column

Car Transmission fluid is a subject we often talk about on the radio show. It has a service interval as specified in your owners manual. Changing the fluid as recommended can help to extend the life of the transmission and help keep it running in top shape. Consult with your auto repair facility for recommendations specific to your own vehicle.


Daily Car Repair and Advice Tips Question 1 Transmission Fluid

 Dear Motor Medics,
I am a loyal Hoody from Canada listening to your car-talk show every chance I get. My car is a 2004 Chrysler 300M with 80,000 miles, that I bought last year. Since I didn't know the car's service history I decided to have the transmission fluid and filter changed as you have talked about on your radio show. Listening to you talk I have learned that this only replaces some of the fluid therefore I would like to take my car in to have a complete transmission flush done where they will replace all the fluid. Would you say that this is advisable to do at the current mileage?

Thank you Lawrence in Canada

Dear Lawrence,
This is one of the most frequent questions we get about cars on our radio show. With this model if it hasn’t been done it’s a good idea to flush your transmission instead of just dropping the pan and changing the filter and whatever fluid comes out. Removing just the pan to drain the transmission will only result in about 5 quarts out of 15 or so being changed, or roughly 1/3rd of the capacity. That would be like changing only 2 quarts of engine oil each change instead of draining the entire engine. The contaminated fluid will eventually lead to a buildup of deposits on the valves and eventual slipping of the transmission. For a complete flush we recommend adding a cleaner to the transmission then operating through all of the gears and then flush it. Once flushed add a conditioner and you should be set. Most facilities with a flush service should have this option available.

Take care, the Motor Medics

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Advice given by the Motor Medics is for entertainment only. Each problem is different and requires different approaches and answers given here are opinions and just one possibility. In order to make an accurate diagnosis a qualified technician should make a hands-on diagnosis. Always follow all recommended safety procedures and consult with your own qualified technician before attempting repairs of any kind.


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