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Vibration when throttling

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Old Dec 10, 2007 | 01:20 AM
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Vibration when throttling

I have an '03 F250 6.0 automatic. When I throttle I get a vibration, not real violent but noticable. When I let off the throttle it seems to compleatly quit. At this point I'm perlpexed. Any ideas?????
 
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Old Dec 10, 2007 | 01:38 PM
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Me Too! Mine never did before but I recently had the head gaskets done under warranty and now I get a vibration typically between 1300 and 1700 RPM. I can feel it on my left foot through the floor board. I have no idea what it is since it doesn't do it at idle or above 2000 RPM. Very annoying though. I'm thinking it may be either an exaust issue or maybe an engine mount but again I just don't know!
 
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Old Dec 10, 2007 | 01:51 PM
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Originally Posted by otter712
I have an '03 F250 6.0 automatic. When I throttle I get a vibration, not real violent but noticable. When I let off the throttle it seems to compleatly quit. At this point I'm perlpexed. Any ideas?????
Does this occur at all times (all RPM ranges) when accelerating? If it does then the slip yoke on the drive shaft may need to be lubed or you may have a bad u-joint.
 
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Old Dec 10, 2007 | 01:52 PM
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Originally Posted by FourbynFord
Me Too! Mine never did before but I recently had the head gaskets done under warranty and now I get a vibration typically between 1300 and 1700 RPM. I can feel it on my left foot through the floor board. I have no idea what it is since it doesn't do it at idle or above 2000 RPM. Very annoying though. I'm thinking it may be either an exaust issue or maybe an engine mount but again I just don't know!
Make sure the exhaust system is tight and not rubbing on anything.
 
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Old Dec 10, 2007 | 09:24 PM
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Originally Posted by otter712
I have an '03 F250 6.0 automatic. When I throttle I get a vibration, not real violent but noticable. When I let off the throttle it seems to compleatly quit. At this point I'm perlpexed. Any ideas?????

U-joints, Slip yoke, carrier bearing, Ive also seen this happen where people have bumped the driveline on a rock or something and and bent it slightly and it does exatly what you mention.
 
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Old Dec 11, 2007 | 01:10 AM
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Does do it through all RPM ranges may even be a little worse when taking off from a dead stop. Could this even be a wheel bearing even though it stops when I let off the accelerator?
 
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Old Dec 11, 2007 | 01:18 AM
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Generally if it only does it when accelerating it is in the driveshaft or transmission. Since you say it is worse from a dead stop then i would lean toward the driveshaft (splines, ujoints etc). Is there a lift on the truck?

How many miles on the truck and what mods. Also are there any other symptoms?
 
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Old Dec 11, 2007 | 01:38 AM
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No lift or mods all stock. Around 83,000.
 
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Old Dec 11, 2007 | 01:43 AM
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Check your u-joints, slip yoke and carrier bearing. Has the transmission been regularly serviced every 30k miles?
 
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Old Dec 11, 2007 | 01:48 AM
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Transmission has been serviced regulary and shift smooth.
 
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Old Dec 11, 2007 | 01:52 AM
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Okay check the simple stuff first, u-joints, slip yoke, carrier bearing.
 
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Old Dec 11, 2007 | 02:00 AM
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Wanted to get to it today but the rain never seems to quit. It would have been nice if the wife's yard sale would have done better this summer so I could get it in the nice heated garage. hehehehehe. Hopefully I can do it tommorrow. I'll post my findings.
 
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Old Dec 11, 2007 | 10:57 AM
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Originally Posted by blackhat620
Make sure the exhaust system is tight and not rubbing on anything.
I second this opinion. I have some strange vibrations and rattles going on after I installed my exhaust. Everyone here told me to check that the hangers or nothing else was rubbing. Sure enough a little re adjustment and it is good as new.
 
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Old Dec 11, 2007 | 12:14 PM
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Sounds like driveline, usually when you throtlle it and load the driveshaft, then it vibrates. When you unload it by taking your foot off, then it goes away. Ive had this problem on a couple of prior vehicles. I am suprised to hear of this on a newer vehicle though (83,000 miles), usually balancing the driveshaft or u joint replacement can solve it.
 
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Old Dec 11, 2007 | 12:38 PM
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Also check the sway bar link ends. I kept feeling vibrations through the floorboards from the bad link ends.

To check/eliminate the link ends disconnect from the frame and test drive.
 
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