Trans bypass questions - Ford Powerstroke Diesel Forum
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Old 02-01-2010, 04:35 PM
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Trans bypass questions

Hello everyone, new guy here. Ive been doing alot of searching about my new truck, 2001 7.3sd with auto. Ive installed trans temp and boost gauge and so far there are no problems. My concern is high trans temps with the bypass issues, I bought a new bypass for the truck but all is good for now. The truck has 150,000 miles on it and appears to be original trans. How long are these bypass lines good for, or should I replace it before I have a problem. Thanks for any input..2001 7.3sd with superchips 1805
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Old 02-01-2010, 05:35 PM
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Why do you think you need to change those lines.????
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Old 02-02-2010, 01:07 PM
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Im not having problems with the trans at all, but reading the other posts in this column I dont want to blow up the trans, from overheating it, when im pulling my toy hauler. On vacation is the last time or place I want to work on my truck. Also, I have read that adding a tuner raises line pressure, possibly causing the bypass to fail. I would like to permanently bypass the line but im not sure how. Thanks again for any input..Harley Hauler
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Old 02-02-2010, 01:14 PM
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Quote:
Originally Posted by harley hauler View Post
Im not having problems with the trans at all, but reading the other posts in this column I dont want to blow up the trans, from overheating it, when im pulling my toy hauler. On vacation is the last time or place I want to work on my truck. Also, I have read that adding a tuner raises line pressure, possibly causing the bypass to fail. I would like to permanently bypass the line but im not sure how. Thanks again for any input..Harley Hauler
do not take off the bypass line.. its there for a reason.. if for some reason the trans cooler clogs up it bypases that and dumps the oil back into the trans... if you take it off you would cook your trans very quick....

if you want it to last do this...

upgrade the valvebody
install a larger cooler like the 6.0L trans cooler

also get yourself a custom tuned chip that tunes the transmission....

and never heard that a tuner makes a bypass line fail...

-Raul
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Old 02-02-2010, 01:44 PM
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10-4 to what raul said.
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Old 02-11-2010, 01:06 PM
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One would think that if your cooler clogs up, you will toast your trans anyway. Ford claims the bypass is there for extra lube during winter time warm ups.
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Old 02-11-2010, 01:14 PM
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nope its for what Raul said. Brian at BTS told me that as well
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Old 02-11-2010, 01:24 PM
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nope its for what Raul said. Brian at BTS told me that as well
nope, it's what ford engineers say!
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Old 02-11-2010, 01:30 PM
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definitely dont take the line off! it will be okay for a while, but if that thing ever plugs up your tranny will be running dry....
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Old 02-11-2010, 01:58 PM
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Ask John Woods why he removes them and how come millions upon millions of automatic transmissions don't have them.
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