4R100 question
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Joined: Apr 2004
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4R100 question
I had my tranny flushed on the SD @ 30K. Now I'm approaching 60K, and thinking of doing a good old fashioned tranny service.
Is there a drain plug on the torque converter? Is there a real advantage to swapping over to synthetic fluid? I pull my car trailer once or twice a month with a total weight of 8000 to 9000 lbs (trailer and vehicle).
Is there a drain plug on the torque converter? Is there a real advantage to swapping over to synthetic fluid? I pull my car trailer once or twice a month with a total weight of 8000 to 9000 lbs (trailer and vehicle).
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,734
Likes: 2,663
From: SE Florida
Drain plugs were eliminated early in the 2002 model year. Any torque converter built after August, 2001, does not have a drain plug.
Here's how you can do it yourself. It has a section on changing the filter, too, if you want to.
https://www.ford-trucks.com/article/...nsmission.html
Here's how you can do it yourself. It has a section on changing the filter, too, if you want to.
https://www.ford-trucks.com/article/...nsmission.html
Fleet Mechanic
Joined: Apr 2001
Posts: 1,264
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I use Mark's method. But I do deviate slightly from his instructions. Rather than running until I see air bubbles in the clear line, I use a bucket that is marked at 3 quarts. I pump out 3 quarts, then add 3 more. I repeat until the fluid is clean. I personally have no problem with following his instructions exactly, but it made my assistant uncomfortable 
