Transmission fluid change or flush

Truluv205

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I have a 2017 expedition limited with 85,000 miles, I haven’t had a transmission fluid change since I’ve owned it, should I get a change or flush.
 

ManUpOrShutUp

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I'm strongly opposed to high mileage flushes after we had one push an aging trans (200k+) to its death, but at 85k I have always gone w/ a flush. Later on I just drain, fill and change the filter.
 

99WhiteC5Coupe

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I have a 2017 expedition limited with 85,000 miles, I haven’t had a transmission fluid change since I’ve owned it, should I get a change or flush.



GM has issued a TSB instructing dealers to NOT flush automatic transmissions (except flushing an external oil cooler for debris after repair), including the six-speed transmissions (which were developed jointly by Ford and GM).

GM also states adding anything other than recommended transmission fluid is considered a contaminate.

MANY dealers push the flush method as it is a huge money maker by them, as opposed to removing the pan and replacing the fluid and filter. Some flush procedures (such as by aftermarket company BG) use a cleaner in the flush, which could be considered a contaminant.
 
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