Drivetrain issues. Read my issue, maybe you can help... - Ford Powerstroke Diesel Forum
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  #1  
Old 12-19-2013, 01:08 PM
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Drivetrain issues. Read my issue, maybe you can help...

This has been an ongoing issue. If the truck is in 4wd, it will vibrate BADLY, as to where the dash actually moves up and down. It feels like something out of balance.

Wont do it with the hubs unlocked, and the transfer case unlocked
Wont do it with the hubs unlocked, and the transfer case locked in 4HI
Wont do it with the hubs locked, and the transfer case unlocked
Wont do it in 4LO, cant get above 10mph.
Wont do it in 2WD at all
Took out the front shaft, locked the axle in, locked the case in, wont do it.

Does it in reverse and forward.

Replaced BOTH Universals in front driveshaft, had the shaft checked for balance, and taken apart and inspected by a VERY REPUTABLE shop. Replaced the transfer case with a known good case. Still have the bad vibration in 4wd. The dash literally shakes up and down. The track bar, and radius arms are tight, and under 5000 miles. The front axle was serviced under a year ago with new universals and a new gear set.

SO, what could cause the issue I am having? Its almost like its in the front axle, but WHAT COULD IT BE?

Rear axle has been totally serviced, and all new universals in the rear driveshaft except for one, it still is good, and moves freely.

Any ideas?
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Old 12-19-2013, 02:03 PM
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The yolks? considering the shaft is what is being shook
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Old 12-19-2013, 02:08 PM
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You seem to have ruled out the drive shift which would have been my first thought. Has the front or rear axle been changed? Maybe the gear ratios don't match? Is the vibration moving in a straight line e or turning?
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Old 12-19-2013, 02:10 PM
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I second the bearing on the yolk of the axle
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Old 12-19-2013, 02:14 PM
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Rear axle has new bearings. Front axle has good bearings. Drive shafts are totally new minus one universal in the rear. Still in good shape. No play in anything. Or tight spots either.

They are 06 axles. I had the 4:10's removed and replaced with 3:73's. I'm just curious if they screwed up and installed a wrong gear set back in. Or if its the driveshaft angle. I'm about 5" over stock height.
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Old 12-19-2013, 03:08 PM
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Open front diff, not posi or limited? Jack the fronT up and lock the hubs. Count the rotations of the pinion joint to one rotation of a tire and match it to the rear doing the same thing. If they match then the ratios are the same.
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Old 12-19-2013, 03:16 PM
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Front is open. Rear is limited.

Isn't it 1 tire up. 2x tire revolutions for open
And then 2 tires up. 1x revolutions for limited slip or locked?
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Old 12-19-2013, 03:23 PM
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Yes, I just didn't know your combination of traction parts.

Last edited by BigFuel; 12-19-2013 at 03:41 PM.
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Old 12-19-2013, 03:24 PM
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That's why we clarify! Haha
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Old 12-19-2013, 06:08 PM
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I would be pulling diff covers and checking gear ratios
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