Transmission fluid change question?
Post Fiend
Joined: Feb 2007
Posts: 14,541
Likes: 2
From: Dallas-Ft. Worth
You start by draining the pan, which is the starting point for the flow. When you unhook the return line from the cooler, that is the end point. As you pump the new fluid out of the pan and through the trans (while cycling through gears), you're forcing the old out the return line into your catch pan. There's a little mixing, but you get a complete change that way. I can't think of another way to get it as much of the old out, other than a power flush, which pretty much everyone agrees is bad.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,723
Likes: 2,650
From: SE Florida
How would you do that on a 2002 or newer that doesn't have a drain plug in the torque converter?
New User
Joined: Sep 2009
Posts: 3
Likes: 0
what fulids should be changed
I have a used F 350 with 269,000 plus miles. I am doing an oil change today on it. Waht other fulids should I be looking to change out? I bought this truck to tow my 30' travel trailer in the Wy and Co state areas. 
Laughing Gas
Joined: Apr 2007
Posts: 1,028
Likes: 3
From: Broad Run, Va
Thanks,
Andy
Elder User
Joined: Mar 2006
Posts: 751
Likes: 0
From: Greeneville,TN
You start by draining the pan, which is the starting point for the flow. When you unhook the return line from the cooler, that is the end point. As you pump the new fluid out of the pan and through the trans (while cycling through gears), you're forcing the old out the return line into your catch pan. There's a little mixing, but you get a complete change that way. I can't think of another way to get it as much of the old out, other than a power flush, which pretty much everyone agrees is bad.
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Hotshot
Joined: Jan 2002
Posts: 17,988
Likes: 207
From: La La Land
Front differential gear oil.
Transfer case oil.
Transmission oil.
Brake fluid, (master cylinder and bleed brake system).
Power steering fluid.
Coolant.
All of 'em! ALL!
Yes, and engine oil.
Pop
Laughing Gas
Joined: Apr 2007
Posts: 1,028
Likes: 3
From: Broad Run, Va
one more question...
at what stage of this process should you change out the filter?
I am thinking that you would drop the pan and drain what comes out, change the filter, put the pan back on and then start your 6 qts at a time refil process....
is this correct?
I am thinking that you would drop the pan and drain what comes out, change the filter, put the pan back on and then start your 6 qts at a time refil process....
is this correct?
Hotshot
Joined: Jan 2002
Posts: 17,988
Likes: 207
From: La La Land
Pop