Transmission Cooling Lines
Thread Starter
Junior Member
Joined: Dec 2010
Posts: 21
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From: Fort Lauderdale
Transmission Cooling Lines
I picked up a 93 F150 XLT Supercab 5.0 at the beginning of the week dirt cheap. Love it! I am having one problem and I would like to hear from you guys to see what would be the easiest and best way to fix it. I am leaking transmission fluid thru the line that goes from the radiator to the transmission cooler in the front. The line is in pretty bad condition. I cut it where it was leaking and placed a rubber hose and clamped it down. Then it started leaking from one of the fittings, so I replaced one end of it. Not it is leaking from another hole in the line. It is driving me nuts!
I figure it would be best just to replace the entire line with new metal tubing, but no one has it already made. I need to buy a line and bend it myself, never done that before. Can't even find lines at my local auto part store. Any suggestion so I can get my truck back on the road would be great. Just bought and I am dying to enjoy it.
I figure it would be best just to replace the entire line with new metal tubing, but no one has it already made. I need to buy a line and bend it myself, never done that before. Can't even find lines at my local auto part store. Any suggestion so I can get my truck back on the road would be great. Just bought and I am dying to enjoy it.
I LOVE OLD FORD'S
Joined: Nov 2010
Posts: 495
Likes: 0
From: daphne al
go to a local tranny shop. they could help you with the lines, or a bone yard and get some used ones, as far as installing it use some teflon tape where the lines go into the radiator or it will leak, trust me i know. did that on 2 vehicles i replaced the radiator/did radiator work on.
Thread Starter
Junior Member
Joined: Dec 2010
Posts: 21
Likes: 0
From: Fort Lauderdale
go to a local tranny shop. they could help you with the lines, or a bone yard and get some used ones, as far as installing it use some teflon tape where the lines go into the radiator or it will leak, trust me i know. did that on 2 vehicles i replaced the radiator/did radiator work on.
I have not tried a tranny shop, didn't think of it. Good idea! I knew I came to the right forum.
April 2010 TOTM Winner
Joined: Jan 2010
Posts: 515
Likes: 3
From: Panama City, FL
I checked LMC,
they only have the Pre-Bent Transmission Lines for 1980-90 F-Series
with the C6 Transmission.
I have a old catalog though...
www.LMCTRUCK.com
The hard metal transmission lines are very difficult to get started screwing into the side of the transmission,
or it was for me last year when I replaced my Flex-Plate.
It was hard to get to, very difficult to reach and turn the fitting on the forward line,
it may be easier if the truck is on a grease-rack though.
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The rubber hose used when cutting the leaking area of the line out needs to be a special rubber hose
and NOT gas hose, the gasoline hose will not last very long with the HOT transmission fluid pumping through it,
for a while, but not a long time.
At an Auto Parts Store such as NAPA; ask about a special rubber hose for repairing a transmission fluid line leak,
they have a hydraulics hose or some special hose that can be used for this purpose,
because I had to repair my T-fluid line near my radiator.
Use two clamps on each end!
And as Ben said; use Teflon tape on the fittings.
they only have the Pre-Bent Transmission Lines for 1980-90 F-Series
with the C6 Transmission.
I have a old catalog though...
www.LMCTRUCK.com
The hard metal transmission lines are very difficult to get started screwing into the side of the transmission,
or it was for me last year when I replaced my Flex-Plate.
It was hard to get to, very difficult to reach and turn the fitting on the forward line,
it may be easier if the truck is on a grease-rack though.
----------------------------------------------------------------------
The rubber hose used when cutting the leaking area of the line out needs to be a special rubber hose
and NOT gas hose, the gasoline hose will not last very long with the HOT transmission fluid pumping through it,
for a while, but not a long time.
At an Auto Parts Store such as NAPA; ask about a special rubber hose for repairing a transmission fluid line leak,
they have a hydraulics hose or some special hose that can be used for this purpose,
because I had to repair my T-fluid line near my radiator.
Use two clamps on each end!
And as Ben said; use Teflon tape on the fittings.
Senior Member
Joined: Jan 2008
Posts: 1,254
Likes: 4
From: Pablo MT
These should be compression fittings on the transmission cooler lines, this means that you should not have any fluid on the threads so teflon tape won't do anything. Check the fittings for grooves, bumps, or dips as these would allow the fluid to leak past the fitting.