Focus Fanatics - View Single Post - What a difference changing transmission fluid makes!!
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Old 03-07-2013, 12:26 AM   #4
scott7278
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Join Date: Jun 2012
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Location: St. Louis, MO
What I Drive: 2012 Red Candy SEL Hatchback

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Quote:
Originally Posted by Eduktion View Post
but i heard that changing it the trans fluid after high mileage isnt worth doing??? my car is doing this so any ones advice on wit would be a mega help!
That used to be true on old, old cars - the theory was the detergents in the newer fluid would cause the break-in process all over again, causing more wear, and the varnish would break off and get stuck in the shift valves. This was when automotive technology was primitive (by today's standards), and vehicles headed to the junk yard much sooner.

If you want your transmission to last, leaving dirty, broken-down fluid in there will not help you one bit. Flush and fill it, all of it, and your car will love you for it.
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