Question about 1991 Ford F150

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Vibration during acclerating .ford f150 91

I repair all the head gaskets in my truck ,change fluids ,spark plugs, wires, water pump, vacum lines ,u.joints,center bearing on drive shaft ,rotation and balance ,tires in a good shape .
i"m having a vibration problem ,some times it"s strong and somtimes it"s weak ,the sound comes of the area in between the engine and the trans.
mostly it does happen after i take a turn and try to accelerate ,then i get this weird grinding noise ,i release the gas and push back and the problem fixed

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2 piece drivelines have to be properly put together at carrier bearing, one spline off in either direction, you get vibration,get under truck, compare front and rear sections of driveline, if u-joints don't line up,it' out of balance

Posted on Feb 01, 2010

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Believe it or not check your engine and transmission mounts. They are reinforced rubber and they may be giving, causing misalignment, creating vibration.

Posted on Feb 01, 2010

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