First thing is remove the fill and drain plug of the transmission pan. Get Redline D4 ATF. You will need about 5 liters. Fill until the AFT run out of the fill hole while the car is on jacks.You will need a hand pump. I you want to remove the pan and replace the transmission filter you can do that as well. The transmission works on fluid pressure and your fluid in probably done.
In my preventative maintenance - changing out about4 liters of ATF each year I skip changing my filter.
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