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Transmission fluid change, not flush

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Sep 24, 2017, 1:28 PM

Post #1 of 2 (595 views)
Transmission fluid change, not flush Sign In

I have a 2003 SR5 AWD with 199,300 miles. The last time I had a professional transmission service for it was around 135,000 miles when I had a Toyota dealer performed transmission flush. Two days ago, I decided to do a transmission fluid change myself after reading and watching some youtube. I simply open the drain plug and let all the fluids out. Overall about 4.2 quarts came out. I then refilled it with Walmart "Super Tech Multi-Vehicle Low Viscosity Automatic Transmission Fluid", I put a little over 4 quarts back in. It drives fine, I didn't notice anything different, driving it around town for over 100 miles now. Last night I did some more reading found out that what I did doesn't drain all the trans fluid out, and that over half of it is in other parts of the tranny that won't come out short of a flush. So now I have 4 quarts of the Super Tech fluids mixing with the old Toyota Type-IV fluid (which I assume was what the dealer put in). I am worried now, even though the label on Super Tech says it's compatible with Toyota type-IV fluid. Should I bring it to the dealer and have them do a full flush and fill? I am thinking of just doing a couple more drain and fill to dilute it more with the Super Tech fluids. Thank you.

Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Sep 24, 2017, 2:53 PM

Post #2 of 2 (586 views)
Re: Transmission fluid change, not flush Sign In

First understand that there is no flushing involved. All they are doing is letting the transmission itself pump out the old fluid while replacing it quart for quart.

There is no big deal in what you did. Maybe you would want to repeat that process in a few months to get more of the old fluid out. It won't hurt anything.


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