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Bad Vibration on Accel..

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Old 06-15-2010, 01:04 PM
Join Date: Nov 2009
Location: "CANADA"
Vehicle: 2004 Ford F150
Posts: 62
Bad Vibration on Accel..

So after searching on here for a while and trying and looking over a few things, I am kinda stumped here, My truck is vibrating when you take off on acceleration, it is there when you are tourqing on it, I hve read up on the IWE and have tryed with mine to put it in 4hi, and when it is in 4hi the vibrtion goes away, from what i have read here it will make a grinding squilling noise if it is the IWE, I am just wondering if there is anything else to it, or something else it could be, tranny maybe, rear end, ???
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Old 06-15-2010, 02:56 PM
Senior Member
Join Date: Dec 2008
Location: Sault,ontario,CaNaDa
Vehicle: 2006 Ford F150
Posts: 508
Its more than likely the IWE's. They run off engine vacuum to keep them from engaging and under acceleration there is the least amont of vacuum causing them to try to engage

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Old 06-22-2010, 03:08 PM
Join Date: Nov 2009
Location: "CANADA"
Vehicle: 2004 Ford F150
Posts: 62
So it has gotten worse, it does it in 4hi also now, not going to lie Im getting tired of all the little things that go wrong with this truck
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