Fixing Broken Transmission line

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Feb 15, 2014 | 08:34 PM

Hartwa

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Fixing Broken Transmission line

Hi Fellas...

Any of you had look fixing a broken transmission line? I would replace it but it looks like it would be a nightmare to run the new line. It is broken on the metal about 1/2" up from the connection.

I was thinking about getting a smaller diameter section of a line to fit inside the brake and then trying to braze it on both ends...I do not think I have enough room on the nut end to use a high pressure hose and clamp...suggestions?

THanks..

Hartwa

Feb 15, 2014 | 10:06 PM

projectnitemare

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Not sure what you are working on so it will depend on what kind of flare you have. If you have a standard flare fitting, get a new piece of line, screw one end in, make a clean cut at a good piece of the old line and compression fitting them together. If you have a funky fitting use compression fittings to splice the good piece in. I wouldn't suggest the method you would like to use. And yes running transmission lines suck.

Feb 16, 2014 | 07:37 AM

Mark Kovalsky

Frmr Ford Trans Engr

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From: SE Florida

Do NOT use a smaller diameter. You will restrict the flow and damage the transmission.

Depending on what transmission you have it doesn't require high pressure hose. Some transmissions won't see over 30 PSI, some will get up to 70 PSI. If you used rubber hose it does need to be transmission fluid rated.

Feb 16, 2014 | 11:07 AM

Hartwa

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I uploaded a pic of the break....why would you not try to braze a coupler on it? Not sure I have enough room for a compression fitting...

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Feb 16, 2014 | 01:20 PM

Mark Kovalsky

Frmr Ford Trans Engr

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From: SE Florida

I didn't say don't braze a coupler, I said don't restrict the flow with a smaller diameter.

Feb 16, 2014 | 02:01 PM

Bigpipes 35

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From: Forest lake minnesota

Can you remove the fitting and take out the broken peice then reflare the line and screw the fitting back in, Make sure to slide the fitting on the line before you flare it,,

Feb 16, 2014 | 06:42 PM

Hartwa

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i tried to remove the broken end but it is held in there with a clip...cannot remove the clip without ruining it.

I had to go with a smaller diameter because there was not enough of a nub to braze to the outside. If you consider the length of the overall system tubing plus the cooler the small restriction of using a smaller line 1" long should be insignificant. The two lines must be 12' plus there has to be a lot of resistance in the cooler.

I used a brake line... I am going to have this brazed tomorrow at work and then use high pressure hose to splice the two ends. Probably use the crimp on clamps I used on my PEX tubing in the house.

If it fails will it happen right away...or is there more pressure generated when driving....what about towing a load? Does pressure increase with load?

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Feb 17, 2014 | 07:48 AM

Kdr358

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From: West of Chicago

Up here in salt country when they leak I just cut out the broken part and replace it with a piece of rubber transmission line. Use 2 good made in USA hose clamps on either side and you'll be fine.

I have a feeling the smaller line will come back to haunt you in the warmer months. Believe me adding a smaller diameter piece may not seem like it makes a difference but it does.

Take a garden hose for example, say it's 3/4 inner dia, try replacing a piece of it with 1/2 inch hose and tell me there's no difference. Well the only difference is garden hose is 20.00, a 4R100 is 2,000.00.

Feb 28, 2014 | 08:41 AM

#10

Hartwa

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Ok....took your guys concerns to heart about the smaller line section and decided to buy a new line from Ford. It came in the mail yesterday.... hmmm...no nuts on the end of the line? Called ford and they said that the nuts come with the cooler. Nice...200 for the cooler so essentially 100 bucks for a nut.

What would you guys do?

Feb 28, 2014 | 09:16 AM

#11

Hartwa

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Not sure why the image didn't load above.

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Feb 28, 2014 | 12:23 PM

#12

meborder

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From: Sioux Falls Area

i would have cut the broken line off where the metal is straight and used a 6" piece of rubber hose and a barbed hose fitting in the cooler.

using a smaller diameter tube inside the cooler line was a bad idea, but using a larger diameter hose over the cooler line should be fine.

can you return the lines, or are you stuck with them?

Feb 28, 2014 | 05:05 PM

#13

Hartwa

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I Just Ordered A New Cooler Today....Terrible To Have To Do That To Get The Correct Fittings...Paid 180 For The Cooler..90 Bucks A Peice For The Two Fittings I Need....Ridiculus.