> I had my front axleshaft bearings and seals changed. No more leaks. One
> nagging problem exists. At about 55mph the truck starts to vibrate and it
> increases when I let off the gas. This continues until about 65mph when
it
> smooths out. The shop I had it at thinks the vibration is coming from
> under the cab and seems to be at about the same speed as the driveshaft
(as
> compared to the ~ x4 rate of the wheels). This vibration happens in both
> 2wd and 4wd. The mechanic thinks it is either the front driveshaft
> universal or the drive shaft.
>
> Anyone have any experience with this sort of thing? If so, how do I
> isolate the problem. The mech. suggested putting the truck on jackstands
> and running it at 55 mph. I suppose I could do that but I'd had to launch
> the truck thru the front of my garage.
You can visually look and make sure the balancing weights are tack welded on
the the driveshafts, cause just like tires, if not properly balanced, they
will give some nasty vibrations. Go and have your tires rotated and balanced
first. Most shop in my area charge $15 to balance a driveshaft. The shops
are alot more accurate also than the driveshaft balancing that comes from
the factory. Hope this helps.
Kyle
93 Dakota 4x4 V6
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