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Old 03-11-2010, 02:29 PM   #1
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very bad vibration

So this is wat I've done. I did a leaf over and put 33's on it. I turned my rear axle up some and had the drive shaft lengthened. Got it all back together and it vibrates so bad u can't even drive it. The weird thing is as soon as ya let off the gas the vibration goes away. Any help guys
87 V6 33x1250x15
Motorcraft 2100
Nutter bypass

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Old 03-11-2010, 02:44 PM   #2
Join Date: Sep 2009
Location: Pinch, West Virginia
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Its got to be in your drive shaft. I lifted mine 4" and have had tons of problems with driveshaft vibration. I'm not sure what all is affected by what you have done with your springs but I'm guessing you need to put on a T-case drop. I had to put a T-case drop on mine as well as a slip yoke elimanaotor to solve my vib but I still have a little which I'm working on. I'm guessing the reason your vib stops when you let off the gas is your driveshaft and rear yoke line up better and when you give it gas the torc from your wheels tend to tilt your yoke down causing your shaft to be out of line with your T-case and viberate.
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