Originally Posted by roblaza
OKAY, i'm bringing this back to life. I've read the 4 pages and haven't really come to a conclusion. My XJ has 192,000km on it and it looks as if it's been a long time since the last fluid change as it's just about brown. Should I change it out?? Should I leave it? Should I drain the pan and fill it, drive it, drain, fill drive, drain fill drive? I need some serious advice on this topic. It is shifting great right now, but do I want to keep the old crap fluid in there??
The answer to this question is easy. You do NOT
want to leave old brown transmission fluid in there!! And I will argue with anybody that says you should. Fluid wears out. And it needs to be replaced. Period.
I am a big fan of the technique of draining what is in the pan, refilling with Dex/Merc III (not ATF+4), running for a couple hundred miles, then repeating until the fluid STAYS a nice red color.
This is an inexpensive and safe way to maximize the life of your abused AW4 transmission.
And changing or cleaning the filter when you reach a consistent RED color might not be a bad idea.