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Old 12-21-2012, 11:04 PM
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I have a problem but I don't know what

I have a 2004 F250, 6.0L. My dad borrowed it to pull his camper. He brought it back and said that the trannie was acting up, slipping, not shifting up properly, hanging up in higher gears when slowing, etc. When we checked the trannie fluid it was low but not empty or dangerously low. We added some Lucas Trans treatment to see if this would fix the problem. My dad drove it again the next day and said that it was still not working properly. I drove it to work on Saturday, a distance of about 27 miles one way. About half way, on the way there, I was stopped at a traffic light. When the light changed and I went to pull off the motor started making a woo sound as if it was under a lot of stress and strain as if the trannie wasn't shifting up through the gears. It also seemed that their was very little power and that the throttle was hard to push down on. The boost gauge was registering boost so I'm guessing that it wasn't and issue with the turbo. When I started to pull off from the next light that I was stopped at I listened very closly to the shifting of the trannie and it seemed, from the sound of the RPMs rising and falling, that the trannie was shifting without any issue. However, the tact on the dash was showing that it was turning 2500 to 3000 RPMs and only running at about 45 mph and the motor was still wooing and sounding as if it were under a lot of stress. When I arrived at work I popped the hood, got out and listed to the motor. The woo sound was still present but it was very faint, almost like you had to be listening specifically for the woo sound to hear it at all. This is my first diesel and I don't know a whole lot about them yet so I'm hoping someone here can help me diagnose the issue. Please, if you need any more info to help possibly diagnose the issue please feel free to ask. Thanks in advance for any and all assistance.
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Old 12-21-2012, 11:23 PM
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Check all of your intercooler boots and make sure they are fully seated and clamps are tight. If the boots are connected and tight, then remove the intrcooler tubes and boots and inspect for damage such as holes or splits. With yours being an 04, it could have a one piece black plastice tube that connects the intake elbow to intercooler on drivers side. If so, check the flexible end down at the intercooler for damage. They are known for cracking. Either way, you'll have to remove air filter/cleaner assembly to access the lower clamp on the drivers side tube and remove it.
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Old 12-22-2012, 12:19 AM
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Hey, thanks for your help. So you think it's probably the intercooler system and not the trans or the motor?
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Old 12-22-2012, 12:25 AM
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Quote:
Originally Posted by Rick6365 View Post
Hey, thanks for your help. So you think it's probably the intercooler system and not the trans or the motor?
Yeah, just fixed a truck last night that was doing the same thing. Wouldn't run over 45-50 and wouldn't shift right. Intercooler tube came loose from boot under air filter. Just a hint, if you have to remove air filter, don't try to unclip air filter and remove. It's a lot easier to disconnect the flexible tube that connects the filter to turbo, remove filter minder, disconnect Mass Air Flow Sensor and rubber hose from degas bottle and pull hole assembly out. Sounds like a lot of work but 10x easier and can be done in 5 minutes.
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Old 12-22-2012, 12:28 AM
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Sounds a little confusing. This vid shows what I'm talking about.
Air Filter Change_x264.mp4 - YouTube
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Old 12-22-2012, 12:30 AM
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Awesome, thank you so much. Was that years Powerstroke by any chance built by International?
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Old 12-22-2012, 12:32 AM
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Which one? The one I worked on?
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Old 12-22-2012, 12:35 AM
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The one that is in my truck. It's all factory, as far as I know, and their is a blue International sticker on the passenger side of the heads. I ask because I've been told that some of the Powerstrokes around that time were built by International and not Ford.
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Old 12-22-2012, 12:37 AM
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All of the Power Strokes were built by Navistar/International until the 6.7 came out in 2011.
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Old 12-22-2012, 12:41 AM
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Oh, ok. This is just a question of interest and nothing to do with my truck but, I've been told that Ford is the manufacturer of the Cummins diesel. Is that true?
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