Auto Transmission line help - Dodge Cummins Diesel Forum
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post #1 of 4 (permalink) Old 06-13-2019, 10:39 PM Thread Starter
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Auto Transmission line help

Hello there. I recently put a rebuilt tranny in my 96 3500. I was pulling my 22' holiday trailer and had my SXS on the deck...the line that runs up under the turbo with the crimped rubber hose on it came apart at the crimp. Tranny temp was 145 to 150 degrees. I replaced it and it happened again. This time with just the trailer on. Anyone ever had this happen and what was the fix. Thanx in advance..Mike

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post #2 of 4 (permalink) Old 06-14-2019, 05:50 PM
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You're talking about the cooler line that runs from the trans up to the cylindrical liquid/liquid heat exchanger? And it came apart at the crimp from soft to hard line?

What did you replace it with the first time?

'96 2500 club-cab, long bed, 2WD - Dipricol trans/boost/pyro gauges, ISSPRO fuel pressure gauge, +2qt Chrysler trans pan, Sport headlight retrofit & suvlights conversion harness, fuel heater deleted, KDP tabbed, Raybestos WC37290 (1-1/16") wheel cylinders
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post #3 of 4 (permalink) Old 06-14-2019, 10:35 PM
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Yep, blew that line twice myself. Converted to rubber line with barb fittings rated for 400F and 250psi from mcmaster carr that I got for replacing the oil cooler lines on my 82 Mercedes Diesel, haven't blown apart yet, doesn't leak, seems A-ok. much easier to work with too.

Red Truck: 97 2500 4x4 ECLB 250k-ish, mostly stock.
Purple Truck: 01 1500 4x4 ECSB 12v Conversion, has all the 1996 3/4 ton stuff besides the body at this point.
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post #4 of 4 (permalink) Old 06-14-2019, 11:30 PM Thread Starter
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Quote:
Originally Posted by texasprd View Post
You're talking about the cooler line that runs from the trans up to the cylindrical liquid/liquid heat exchanger? And it came apart at the crimp from soft to hard line?

What did you replace it with the first time?
Yes it came apart at the crimp. We managed to file off the metal crimp and use 2 gear clamps to get it back together. It lasted 3-400 miles then blew apart again. In the meantime I had ordered a new line and had it on hand. I don't trust it now until I can figure out why. Too hot right there right under the turbo and exhaust? Too much pressure for some reason? No fun changing that out on the side of the hyway....lol
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