Vibration when starting out under load, Reason?
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Cross-Country
Joined: Apr 2015
Posts: 86
Likes: 0
From: Everett
Vibration when starting out under load, Reason?
I have begun to notice a vibration when I am in first gear starting out with a bit of a load. The vibration goes away as I gain speed and the load reduces. None at any of the higher gears.
If I take off real easy and allow the truck to gain speed without pushing it, the vibration does not exist.
The truck is the one outlined in my signature. It is equipped with a 3 speed auto with overdrive.
I am thinking this could be a U-Joint that might be starting to go out. What do you think?
If I take off real easy and allow the truck to gain speed without pushing it, the vibration does not exist.
The truck is the one outlined in my signature. It is equipped with a 3 speed auto with overdrive.
I am thinking this could be a U-Joint that might be starting to go out. What do you think?
More Turbo
Joined: Jul 2010
Posts: 535
Likes: 13
From: California High Desert
From what I've experienced with my own truck, a bad u-joint is possible and an inexpensive fix if that is the issue. Over two years I replaced all four brake discs, ball joints, and the front unit bearings before I figured out a vibration issue I was chasing was just a u-joint. $50 and an hour of work and the vibration was finally gone.
Fleet Mechanic
Joined: Nov 2011
Posts: 1,825
Likes: 43
From: Land of Taxes
What the Sarge said. Inspect the carrier and ujoints as suggested. They can visually inspect ok yet be bad; suggesting drive shaft removal so you can "feel" the joints for smooth movement or excessive play. If you have a slip spline it could need grease. Use only Ford XG-8 grease, whole tube.
How many miles on that 03?
How many miles on that 03?
Fleet Mechanic
Joined: Jul 2005
Posts: 1,800
Likes: 52
From: Southern Colorado
My rear-most ujoint was bad, and it cause a vibration when starting from a stop, but only until a certain low speed when the vibration quit.
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Junior User
Joined: Apr 2016
Posts: 62
Likes: 2
I had a 50-60mph vibration that a Ford tech told me was an alignment issue. I replaced the three u joints and the double cardan bearing and viola no more vibration.
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More Turbo
Joined: Jul 2010
Posts: 535
Likes: 13
From: California High Desert
Exactly the same on my truck, only it was upon braking. It was in perfect alignment most of the time, but when braking it would cause the axle to shift just enough to cause a vibration...thus causing me to replace all my brake discs.
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