Changing trans fluid
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Laughing Gas
Joined: Oct 2003
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From: DC
Changing trans fluid
I read in another post where someone flushed their trans by disconnecting the trans cooler output line, running the engine to pump out some fluid, then refill the pan repeat etc until fluid was clean. Why couldn't you disconnect both lines and put one in a jug of new fluid and the other in a bucket and basically do the same thing? Just an idea since I'm getting ready to do my tranny fluid.
Hotshot
Joined: Aug 2002
Posts: 12,679
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From: BC, Canada
Transmission flusher machines work in much the same way escept that they actually pump the oil through rather than the transmission pumping it.
Joe when you change your fluid make sure you drain the torque convertor too. There is a round rubber plug on the bottom of the bellhousing. You get access to the torque convertor drain plug through there. You'll probably have to turn the engine over by hand to find it though.
Joe when you change your fluid make sure you drain the torque convertor too. There is a round rubber plug on the bottom of the bellhousing. You get access to the torque convertor drain plug through there. You'll probably have to turn the engine over by hand to find it though.
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Laughing Gas
Joined: Oct 2003
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From: DC
Thanks for the info, it makes sense that the fluid is pushed through the cooler vice having a "suction". Well, it was a thought. I knew about the plug on the converter, but I've heard the plug isn't reusable, is it?
Logistics Pro
Joined: Jul 2002
Posts: 4,821
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From: South Dakota
make sure that you follow your owners manual and use the proper ATF, they are not all created equal.
BTW you may want to check into what a local garage might charge, my truck came to about 75 bucks done by a garage.
In my case I'd save only a few bucks and I didn't feel that it was worth the mess of doing it my self.
BTW you may want to check into what a local garage might charge, my truck came to about 75 bucks done by a garage.
In my case I'd save only a few bucks and I didn't feel that it was worth the mess of doing it my self.
Postmaster
Joined: Jan 2003
Posts: 4,417
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From: Durham, NC
WHen I flushed the tranny in my Ranger, I would pump about a gallon at a time out the cooler lines, then stop the engine, and add a gallon to the filler (dipstick) tube. I did this about 3 times, the last time I didn't refill, I then dropped the pan, and cleaned everything up (make sure you use lint free material), changed the filter and gasket, and then refilled....I did find that the ATF came out of one of the cooler lines under pressure, like you would expect, but it also dribbled out the other line some....
Oh, and since my owner's manual called out for Mercon 5, I used
Mercon 5 "ONLY" !!!!!!!! DO NOT use generic DEXTRON / MERCON,
or Mobil 1 synthetic ATF, USE ONLY MERCON 5!!!
Oh, and since my owner's manual called out for Mercon 5, I used
Mercon 5 "ONLY" !!!!!!!! DO NOT use generic DEXTRON / MERCON,
or Mobil 1 synthetic ATF, USE ONLY MERCON 5!!!
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Laughing Gas
Joined: Oct 2003
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From: DC
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Hotshot
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Posting Guru
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From: Chicago Area
Actually, the Ford Workshop Manual says to replace the torque converter plug. But, my dealer didn't have one in stock and the tech said they never replace them. However, I did replace it. I think it may have to do with the thread lock compound. You wouldn't want that to back out! Maybe you could add threadlock to the old one.
Probably overkill, but I like to follow the instructions.
Probably overkill, but I like to follow the instructions.
Hotshot
Joined: Aug 2002
Posts: 12,679
Likes: 15
From: BC, Canada
I've never seen where it says to replace the plug but I've never looked either 
That's probably like a lot of things that Ford says not to use over but they work fine anyway.
I changed the trans fluid on a 2002 F150 with a 4R70W today and was quite surprised to find that it didnt have a torque convertor drain plug
I guess it's another one of Ford's cost cutting ideas.
That's probably like a lot of things that Ford says not to use over but they work fine anyway.
I changed the trans fluid on a 2002 F150 with a 4R70W today and was quite surprised to find that it didnt have a torque convertor drain plug
I guess it's another one of Ford's cost cutting ideas.
Posting Guru
Joined: Jan 2004
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From: Hamilton, ohio
i was talking to the ford dealer for when i get ready to have mine done. they do the power flush with the machine but they do not change the filter. i would think that it would be a good idea to change the filter and wipe off the metal shavings on the magnet in the pan. is it nesscesary to change the filter screen??
Hotshot
Joined: Aug 2002
Posts: 12,679
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From: BC, Canada
Replacing the filter is a good idea but not always neccessary. If their flush machine is the same as ours it has a restriction gauge that supposedly tells you if the filter is getting plugged or not. If the trans works fine the filter is probably ok.
I still prefer to see what it looks like in the pan though in case there is anything in there that doesnt look good.
I still prefer to see what it looks like in the pan though in case there is anything in there that doesnt look good.
