I'm about to do a transmission fluid and filter change on my '00 A6 Avant at 158,000miles. Then I read this on Page 55 of the March 2016 issue of Consumers Report , just delivered. Quote:
"The Transmission Flush: If you follow the recommended maintenance intervals, doing a scheduled flush is fine. But don't start doing flushes if you've ignored the intervals. The grime and gunk that collects in unchanged fluid becomes the friction material in an aging clutch pack. Replacing the fluid may cause the transmission to fail"
Yikes.
I guess the key is they qualify their statement by saying a fluid change is only detrimental if you've previously ignored fluid changes.
But this still goes against everything I have read from experts on the topic. I.e. Kansas City TDI (CoolAir VW) who has always been a big proponent of fluid changes.
I guess the debate continues.
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