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Old 11-17-2017, 04:02 PM
Jakethefoxracer Jakethefoxracer is offline
2003 FX4 LVL 2
 
Join Date: May 2015
Posts: 23
Default Hum Starting at 55MPH

Please help me. Had the brakes flushed at a local garage which went well but they noticed my cv joint on my front driveshaft had play. They wanted a grand i said no thanks. Ordered a whole new shaft with a new u joint and CV joint and installed today. Torqued all bolts as specified. Same shaft as orginial as far as length. Drives perfect all the way to 55 then i get a absolutely horrible low pitch hum that was never there before. Driveshaft did come dynamically balanced out of the box. WTF! Please help ideas there is no play at either end at all brand new shaft. What do i do? Bring it to the shop that originally wanted to do it and have them put it on the lift and listen??
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Old 11-17-2017, 04:31 PM
Jakethefoxracer Jakethefoxracer is offline
2003 FX4 LVL 2
 
Join Date: May 2015
Posts: 23
Default Re: Hum Starting at 55MPH

Just called Napa getting another shaft tommorow morning and will install. Will post results.
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  #3  
Old 11-18-2017, 03:47 PM
Jakethefoxracer Jakethefoxracer is offline
2003 FX4 LVL 2
 
Join Date: May 2015
Posts: 23
Default Re: Hum Starting at 55MPH

UPDATE: New driveshaft is in and in working order no more strange vibration and noise at any speed. I think it was a combination of a bad balance and the u joint was shot new out of the box. Crisis averted.
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