Automatic fluid exchange

[severous01]

you can always do a pump n fill

loosen the lines to the cooler, get some sort of drainage going. turn car on and put in neutral. run until it starts sputtering and immediately shut off. there should be some sort of fill plug on the side of trans somewhere. fill until it starts coming out. then start engine and put in neutral again and fill agian until it comes out. that will be about 90% fluid. and if you leave it running and it's not pumping fluid....you'll burn up all the clutches and bands in the trans so you really need to be paying attention.

[Klink10]

Originally Posted by severous01

you can always do a pump n fill

loosen the lines to the cooler, get some sort of drainage going. turn car on and put in neutral. run until it starts sputtering and immediately shut off. there should be some sort of fill plug on the side of trans somewhere. fill until it starts coming out. then start engine and put in neutral again and fill agian until it comes out. that will be about 90% fluid. and if you leave it running and it's not pumping fluid....you'll burn up all the clutches and bands in the trans so you really need to be paying attention.

What you are describing is I believe the method for a sealed type transmission (No dip stick) vs unsealed (with dipstick) in the Yaris. Unless they have gone to the unsealed which I don't know about. I do know that several of the Toyota trucks and maybe some other manufacturers utilize the unsealed versions in various truck models and there are several DIY's in those forums which describe the method you are talking about. The key to doing a full flush and fill from what I've read is to identify the coorect cooling line, disconnecting and then fill while running the motor allowing the pump to move the old out while getting the new in. Of course all this after the sump has been removed, strainer and whatever replaced, magnets cleaned and replaced, new gasket added and cover put back on. I think during the process careful attention should be paid to the amount of the 3.1 qt. capacity is drained to know about how much is left in the system, and to have an adequate amount on hand to do the job........pretty much what I've gathered and am still doing my homework on the subject.