2007 silverado diesel transmission line leak - 2CoolFishing
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Old 03-29-2019, 11:00 AM   #1
redduck
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2007 silverado diesel transmission line leak

a couple of transmission coolant lines are leaking where the rubber hose meets the metal tubing (the crimp area). What is the best and easiest way to fix. I have looked at several utube and see some folks simple cutting the existing crimp off and then applying new screw clamps. I did see an add for new replacement hoses that require cutting the metal tubes and then affixing new hoses using compression clamps.
This looked like a good idea. Any thoughts would be appreciated.
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Old 03-29-2019, 11:22 AM   #2
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The line pressure isn't that much moving a gallon a minute. Though mine is a little older Ford, that's the way mine was done...rubber line worm screw clamped to metal hard lines...when I did some upgrades a little over a year ago, and all still good.
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Old 03-29-2019, 11:41 AM   #3
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I've had a transmission shop most my life, they make a barbed hose fitting with a compression fitting that connects to a metal line , that's the best thing. You can get them at Transtar 800 456 7925 . Or cut your hose and tube, put an inverted flare on the tube then install hose and clamp over it.
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Old 03-29-2019, 03:45 PM   #4
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Have the same truck but 2006. Not sure on how to fix it, but if there is one "common problem" on the 2006-2007 Duramax's it is leaking trans cooler lines.

I got mine at 178k and have 218k now and haven't run into the problem. I'm assuming the problem was addressed by the previous owner. Just figured I'd tell you it's a common problem on these trucks. I'm sure there is vids on Youtube about it.
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Old 04-14-2019, 09:42 AM   #5
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tarpon aamco webster

i'm a little late on this post. i own aamco in webster, if you haven't fixed it and are near by let me know. i'm not a tech, and far from it. but i've got a good staff.
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Old 04-16-2019, 09:49 AM   #6
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After a couple of utubes I went and fixed. Thanks to all who offered help.
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