Transmission fluid change
I have a 99 Corolla , I bought at the end of Aug. this year. I just recently changed the transmission fluid and the fluid was very black when it drained, but when noticing it closely it did have the reddish color. I think it was possibly the original trans fluid. Anyway mileage was about 113k / How can I keep it clean between changes? Because not all the old fluid comes out when it is changed. Do I change it very soon again? And if so how many miles until I change it again? Or is there another way to drain the most trans fluid out of the transmission?
What you did was a drain and fill, replacing some of the fluid, which is the preferred method with that many miles. To drain ALL of the fluid, you would have to do a trans flush. But I would do another drain and fill like you did, and then do it again every 15-30K miles after that.
Or you can drop the pan. It will not get ALL of the fluid as Tom describes, but more than just from drain plug.... and a flush will pick up small debris in the bottom of the pan and in filter screen where it does no harm... and circulate it through your transmission. If you do drop the pan you will see the filter screen. and also the pan has a magnet on the bottom to collect metal 'dust' that can be cleaned and replaced. (Replaced with same magnet, I don't mean you need a new one) The screen can then be cleaned or replaced with new. And I agree with Tom about the next one 30k miles, but not dropping the pan, just drain and fill.
You r never be able to suck out fluid from convertor. Only few shops have that. Thru more oil changes would help
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