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Ok I recently had a friend of mine redo my rear bag setup. I went from a fully reversed triangulated 4 link to a outlaw motor sports parallel 4 link with a barnyard customs watts link. Now at 55 mph and up I get a vibration middle of my truck. My u-joints and trans mount are 6 or 8 months old. The following weekend I put in a new motor and when I went to take my drive shaft out so I could pull the motor and trans my drive shaft yolk wouldn’t go up in my trans. It’s all back together and the motor runs great but I still have the vibration. Im kinda lost on what to do I talked to another friend who knows about this sorta thing and he told me to cut the driveshaft yolk and that I need 1 1/2 inches of play between the yolk and trans tail piece for suspension travel. I havent checked my pinion angle yet but it dosent look bad. All help is greatly appreciated.
 
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