Trans Leak
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Senior User
Joined: Mar 2014
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From: Tyler, TX
Trans Leak
It seems that my E4OD transmission is leaking a bit of fluid at the cooler line input. I just had it rebuild about 15k ago. I took it in to the shop about 6 months ago and they said they fixed the cooler line because there was a small leak. Now that the warranty is up, I need to fix this myself. I'm an engine guy not a trans guy and don't want to mess up the lines at all, so what is the best way to fix the leak?
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Senior User
Joined: Mar 2014
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From: Tyler, TX
sorry about the delayed response! i have been very busy the past few days. it seems that the leak is coming from where the line meets the fitting. do i need to replace the whole line?? i also checked the fluid and even after driving ~10 miles it was in the middle of the cold level, so im thinking it is about .5-1 quart low. could the line leak that much in 2 or 3 weeks?
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,734
Likes: 2,663
From: SE Florida
That line flows a gallon per minute. If it were wide open you'd lose a gallon per minute. If it didn't leak at all you'd lose nothing. Your leak is somewhere in between. Could that mean a quart in a week? Of course.
Is your leak big enough to leak that much? I'm staring into my crystal ball, but the picture is fuzzy. Maybe if you put a bright light under the truck I could see it better.
Is your leak big enough to leak that much? I'm staring into my crystal ball, but the picture is fuzzy. Maybe if you put a bright light under the truck I could see it better.
Laughing Gas
Joined: Aug 2006
Posts: 1,249
Likes: 11
From: oklahoma
May want to pull the line lose an replace the oring in there. I built a trans once an forgot to install those rings an leaked some but not full flow.
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Senior User
Joined: Mar 2014
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From: Tyler, TX
I'm out of town this weekend so I'll get pictures and such when I get back. I had the transmission rebuilt at a reputable shop, and they said that they fixed a small leak by tightening it about 6 months ago. I haven't seen a leak until about 2 weeks ago and I crawl under my truck often. I dont think the o-rings would have gone bad this fast.
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