Plugged Trans Cooler?
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Joined: Mar 2010
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Plugged Trans Cooler?
Well, today was an adventure. I decided to go change the ATF fluid in my 4R100 (early 99 F350 7.3 4wd) following the instructions found here:
https://www.ford-trucks.com/forums/1...and-video.html
However, my trip took a turn about halfway through. I got the pan drained, dropped, filter replaced, crud cleaned out of the bottom, and pan reinstalled with no issues. Then, I pulled the trans cooler return line.
Reference blue and red arrows. Red arrow was where I expected the trans fluid to flow out of when I started the truck... blue arrow was Ole' Bessie on a flat rock 6-9 seconds after startup.
When I pulled the return line initially, fluid was running in a light stream from the blue arrow and never stopped until I plugged it back in.
Needless to say, the auto hobby shop personnel weren't pleased and I got to wipe the floor for the next half hour.
End result is: new filter, and 12 qts of fluid changed. I suspect the trans cooler is plugged (no temp gauge) which is why the fluid came out of the aft port on the trans instead of the return line. Anybody dealt with this before?
https://www.ford-trucks.com/forums/1...and-video.html
However, my trip took a turn about halfway through. I got the pan drained, dropped, filter replaced, crud cleaned out of the bottom, and pan reinstalled with no issues. Then, I pulled the trans cooler return line.
Reference blue and red arrows. Red arrow was where I expected the trans fluid to flow out of when I started the truck... blue arrow was Ole' Bessie on a flat rock 6-9 seconds after startup.
When I pulled the return line initially, fluid was running in a light stream from the blue arrow and never stopped until I plugged it back in.
Needless to say, the auto hobby shop personnel weren't pleased and I got to wipe the floor for the next half hour.
End result is: new filter, and 12 qts of fluid changed. I suspect the trans cooler is plugged (no temp gauge) which is why the fluid came out of the aft port on the trans instead of the return line. Anybody dealt with this before?
Laughing Gas
Joined: Jan 2007
Posts: 870
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From: Carbondale, CO
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Freshman User
Joined: Mar 2010
Posts: 27
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Dean,
Thanks for the link, at least I'm not alone in this. I'll take a look at the tranny bypass (so to speak). Any real world advice? Just seemed very strange taking a transmission fluid bath instead of changing my Trans fluid.
Thanks for the link, at least I'm not alone in this. I'll take a look at the tranny bypass (so to speak). Any real world advice? Just seemed very strange taking a transmission fluid bath instead of changing my Trans fluid.
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