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  1. joedotmac
    04-13-2018 03:14 PM - permalink
    Items I would concentrate and confirm:
    Tire balance
    Driveshaft runout (measured on ends and middle of each shaft)
    Driveshaft Phase between first and second shaft
    Transmission, carrier bearing, and rear differential u-joint operating angles.
    Evaluate if the transmission mount is sufficiently isolating and quelling vibration coming from the driveline, possibly adding Raptor unit if it will install without modification. On my older generation truck, one needs to slot the cross member to accept the Raptor mount.

    Hope this helps

  2. joedotmac
    04-13-2018 03:14 PM - permalink

    Mine was a multitude of issues, tire balance, u-joint operating angles, 2 piece drive shaft phasing, and a new (Raptor) transmission mount (firmer rubber).

    The only way I was able to resolve mine address each possible component. In summary my resolution I believe was caused by multiple contributing factors.

    Maliciously going though and measuring the specifications on each part/component. There is a white paper online from Dana/Spicer with industry best practices covering a multitude of driveline configurations that was a big benefiting the relationship of all the components involved with recommendations. Dana suggested to never exceed three degrees of operating angle on any u-joint, the angle should also be offset on the opposing u-joint angle

    In one of the threads I posted several YouTube videos for reference on the vibration pictured from under the chassis and a couple on driveshaft phasing and the like.
  3. todd2015xlt
    04-08-2018 01:13 PM - permalink
    Hi, my name is Todd Brown, I was hoping you could help me out with my vibration issue in my 2015 screw 6.5 bed. I read the post where you troubleshooted your vibration. I have a take off vibration that worsens when towing and the heavier the load the worse it is, dealer is no help. Im pretty sure its a pinion angle/ driveshaft issue. My truck has 72k miles on it. I have a camper cap always attached and its a 3.5 ecoboost 4wd 157 wb. The angle from the rear tranny is 2 degrees down and the pinion angle is 5 degrees up. Original driveshaft. I had a 5/6th gear vibration that turned out to be a bad torque converter replaced 3k miles ago. I replaced the tires with Michelin LTs and it improved the ride quality and lessended vibration. I have read to use tapered blocks and or shims to make the pinion/tranny angles parallel. The driveshaft carrier bearing appears to be tight and the u-joint are within 1.5 degrees of phase.

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    '13 F150 4x4 EB MaxTow


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