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Thread: How-To flush ATX fluid and change filter Reply to Thread
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Topic Review (Newest First)
05-04-2015 04:01 PM
In a Focus group You're reading too much into the post. I was agreeing with coolkatz's method. Drain, and then add new fluid. As you drain into the bucket, watching the fluid level as he said, clean fluid will eventually start coming out. Of course it gets mixed some before it is all replaced.
Maybe I misunderstood the original post . Not sure why you would pump fluid out before you drop the pan. That's where I see the risk to damage you mention is. Not when cranking and watching for fresh fluid to come out the tube (while maintaining a healthy level)
05-04-2015 03:31 PM
amc49 'As the fluid in the torque converter and rad cooler lines cycles thru the open line, it is replaced by fresh fluid, not mixed.'

Not even..................the fluid is heavily mixed in the convertor with the old fluid and if waiting till what comes out is 'clean' you waited long enough to ruin some extra fluid. The convertor impeller is frothing that new fluid with the old like Momma's electric mixer, no way on earth does it simply come out dirty then suddenly clean. Absolutely no way. The dirty fluid is coming in to mix from 3 different locations in the convertor there.

AND, would you run the engine with no oil pressure as long as you do when changing fluid like this???..........or what you are doing to the trans, when you dump that line in the bucket you just killed your lube feed to 3/4 of the trans, all of the mainshaft bushings get fed from that but no oil as long as the tube is in the bucket. Zero oil pressure to trans while running it........real smart. Look up a fluidchart on the trans and see what the 'lube 2' oil circuit feeds and how it is supplied, from the ass end of the oil cooler.
05-04-2015 08:52 AM
In a Focus group What's meant by "sucking fluid" is instead of mixed old and new fluid being drawn from the pan as described originally, new fluid is. As the fluid in the torque converter and rad cooler lines cycles thru the open line, it is replaced by fresh fluid, not mixed. Now when it comes thru clean you are done. Just top the trans off.
05-03-2015 08:22 AM
Originally Posted by elsolo View Post
There is no sucking of fluid. The cooler outfeed will discharge under pressure, but there will be no sucking up of fresh fluid
That's correct. The inlet hose on the tranny from transmission cooler just dumps into the case; it cannot "suck" fluid. The fluid is pumped from the outlet on the tranny to the cooler and then back to the case.
05-03-2015 04:30 AM
elsolo There is no sucking of fluid. The cooler outfeed will discharge under pressure, but there will be no sucking up of fresh fluid
04-29-2015 10:15 PM
In a Focus group
Originally Posted by c00lkatz View Post
Another way to do it is to remove the pan, drain the fluid, clean the pan and install the new filter, then top it off with some fresh fluid, like normal. But instead, take the cooler inlet hose, stick it into an empty bucket, take the cooler outlet hose, stick it into a bucket filled with fresh fluid, then let the car run. This will allow the pump to drain all the old fluid while sucking in new fluid at the same time. Then you just shut it off when fresh fluid starts coming out of the drain hose. That way you don't accidentally run it dry, and you still flush the whole system at once. Be sure to check the fluid level afterward. If it's too low, top it off, too high use a MityVac/Vacuum Pump and siphon the excess out. That's a tool anyone working on their own car should have anyway. Very handy little device.

Haven't had to do it on my Focus yet, but I've done it on other cars with great success.
That's the way I've always heard how to do it. Pumping it out first confuses me.
12-28-2014 12:42 PM
Originally Posted by jiushiwo View Post
@FocusKnot - What model of remote spin on filter did you use? Where and how did you mount it?
@jiushiwo - I posted a how-to for the remote filter installation here:
12-17-2014 12:36 AM
Dennyj1992 Just now reading this write up for the first time.

Excellent work Focusrun! Thank you for all of the awesome info (and pictures) you included.

It goes to show that even the new guy around these parts can get some mechanical work done with a little try hard and effort.
12-16-2014 10:46 PM
jiushiwo Good to hear that splicing wasn't such a bad idea after all.

Having just learnt that proper maintenance means the first car that someone owns should also be the last, I may very well complete the job with a whole new transmission cooling line.

Thanks again for the input!
12-16-2014 10:11 PM
amc49 X2 to that............
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