hi all, My mums gs300 is on 110k miles and needs a tm fluid change. I heard you need to change it a few times to dilute all the fluid out?

 

It's best to do a drain and fill after the car has been sitting overnight. Don't start the car in the morning, just jack it up and put it on stands. This way you can get close to 4 quarts out. Just put back in exactly what comes out. If you start the car to put it on ramps you will only get 2.5 to maybe 3 quarts out.

 

Thank you for the reply, So repeat this a few times by driving 60 miles and drain again to dilute it?

How many quarts do I need in total to dilute all of it out?

 

I would do a drain and fill one time, then on your next one do a drop pan and replace the filter. I would also save your old fluid, just incase your transmission slips with new fluid.

 

doesnt slip at the moment just a preventative replacement

 

I have drained 2qts and its black as hell.

 

So I changed 2qts now do I need to drive another 5miles and the next 2qts?

 

You can just shift it throughout the range a few times and let it sit in D with your foot on the brake for a few minutes it will mix itself up. You must drain extra fluid as per the manual.

 

ok any link to the manual?

left : old ws fluid
right: new

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Be absolutely certain you put in the same exact amount of fluid you take out, and make sure the fluid is stone cold when you remove it, because if it is slightly warm, the fluid will not read at the same level as cold fluid, so whatever you take out will not be measurable to the same level as cold fluid

 

First time I did with warm was 2 qts now cold 1 qts out. I overfilled it with 10% just in case now.

 

Old fluid vs new fluid on a white rag.

 

So I changed 8qts by driving around the block and diluting the old fluid out:

I changed total 6qts and the last 2 qts I dropped pan and filter. I changed total 8 qts.

























Car shifts much more smoother than the old jerky way. I can't even feel change in gears.

 

Wait, did I see it correctly and you used Mannol ATF?
I'm asking because all I hear all the time from almost anyone is that you should use only Toyota genuine ATF WS, nothing else will be compatible with this factory fluid and may ruin your transmission once mixed. Always been wondering if that's truth.
So did you have any problems after mixing it? I did replace 3qt of my fluid with Toyota WS together with a filter, but I want to flush out old fluid completely out with other brand's compatible ATF, since as far as I know Toyota WS is not fully synthetic fluid.
How is your car driving so far?

 

Many guys have been mixing amsoil with great success