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Old 07-11-2015, 08:30 AM   #1
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2016 Greyhawk Driveshaft issues?

Hey Gang,

I was going to purchase a 2016 29MV; had the color picked out and was ready to roll.

We found a drive shaft vibration running down the chassis around 60-63 mph. The dealer took it to Ford, Ford pulled the drive shaft and sent it off to a specialty shop that specializes in these things. I'm waiting for word on if it was simply mis-balanced or if there is something more serious wrong.

So - my dealer got ANOTHER 29MV in two days ago. I was going to switch over to that one and save some aggravation. My salesman took it out for a ride this morning; SAME THING.

So that's two. I'm going to 'hope' its simply a re-balance as the Ford tech said if that's the case, its easy to fix and he would have 100% confidence in buying it. I'm hoping its a re-balance since its happening to two already.

Drive your Greyhawks before you buy them. The chassis extender for Jayco might have missed a step. I hope its not something more serious than a re-balance.
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Old 07-11-2015, 09:04 AM   #2
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Strange. Your Greyhawk has JRide Plus which is supposed to include a balanced drive shaft. Admittedly that is an extremely long drive shaft, but it is still supposed to be balanced.
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Old 07-11-2015, 09:05 AM   #3
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Yes I know. Something must be up w/ Mor Ryde or whatever its called. I'm really hoping its just a simple re-balance and not something else. Either way Jayco and Ford are both telling me it'll get fixed properly.
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Old 07-11-2015, 03:13 PM   #4
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Would the heavier tow rating (frame reinforcement) possibly have anything to do with weight distribution on drive shaft ?
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Old 07-11-2015, 05:05 PM   #5
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No clue. I should know on Monday what the issue was. I'll let everyone know.
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Old 07-12-2015, 04:24 AM   #6
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i belive i read in one of your previous posts the 2016 has a new transmission. I wonder if that has something to do with the issue. Maybe something jayco or moyride did not account for and are using the older model driveshafts. Just seems strange that two brand new ones have the same issue.
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Old 04-25-2016, 01:47 PM   #7
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Just bought a 2016 Greyhawk 31FS and seem to have same issues. It's seems like when your getting it up to highway speeds it struggles a bit and makes a loud whining sound but then drives okay once you get up to speed (65-70). I did notice it doing it again when I got into some traffic but didn't seem like anything to take it back (yet). I'd be curious what Ford or Jayco says it is.
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Old 04-25-2016, 01:50 PM   #8
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It's a known issue. I believe it has to do with the switch to the 6 speed transmission. There is a shim or something that has to be installed to correct the driveshaft angles/geometry on extended wheelbase applications.
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Old 04-25-2016, 02:07 PM   #9
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I purchased a Greyhawk 29MV about 12 weeks ago. We just returned from a 1,150 trip from Lafayette, LA to Kerrville, TX and back home. I drove speeds of 60mph to as high as 74mph in some instances. There were no vibration issues that we could detect. Because the coach had received a fresh alignment, it handled beautifully.

We are really please at the coach's performance....


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Old 04-25-2016, 05:22 PM   #10
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We have 2016 Greyhawk 31ds. This harmonic balance issue was in the 2016 models. Ours was corrected before we even test drove it. Has something to do when they extend the drivetrain for the length of the chassis. Easily corrected. Our maiden voyage was two weeks ago and it drove beautifully. Call Jayco customer service and they will direct you on what to do. Dealers don't seem to be very helpful when it comes to the chassis.
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