Question about 2004 Toyota Prius
How often should transmission oil or fluid be changed
Here is the answer that you are looking for: Never.
The auto trans fluid in a Prius is what we call "World Spec", and never needs to be changed. Why? Because the Prius trans fluid is not used for hydraulic pressure or cooling the ATF fluid due to the lack of the aforementioned hydraulic pressure. All that the ATF does is perform a "lubrication" function. As long as there is no contamination of the fluid (such as being in a flood), do not bother with it.
Prius Master Tech
Posted on Sep 15, 2008
Toyota Ed just wants some business when the trans goes out, recommended transmission fluid change at 100k then 50 k thereafter. I changed my fluid at 110,000 miles and the fluid was almost black. To assume the fluid does not experience wear in that transmission is ridiculous. Go to priuschat.com for all the info you need.
Posted on Jan 11, 2009
Should tell you in the owner's/service manual. If you don't have the copy in the car, register for free at the Toyota site and download one: http://www.toyotaownersonline.com/Owners/reg.do
Posted on Jul 27, 2008
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Posted on Jan 02, 2017
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