Hi Don,
I just had my driveshaft dynamically spun
balanced. If you rotate the yokes 180deg, you
may need to re-balanced the driveshaft - this was
confirmed by my driveshaft shop. This may
be the imbalance concerns that your mechanic
is referring to. Certainly, 180deg rotation
will not effect the inherent non-constant
velocity characteristics of a u-joint.
Dave Brady
68 TR250 CD8124L
Don Malling wrote:
> My local non-LBC mechanic told me that I can risk the chance of drive
> shaft vibrations if the drive shaft *flange* yokes are installed 180
> out of phase with respect to their original orientation.
>
> I understood from Bentley and threads on this lists that the yoke
> halves that are part of the drive shaft had to be at the same angle
> (the yokes of both ends of the drive shaft had to be in the same
> plane), but I never heard that one could not be 180 degrees off from
> it's original orientation. I also never heard the flange end of the
> yokes could not be reinstalled 180 degrees off with respect to their
> original orientation.
>
> Any comments?
>
> I'm concerned that I have already removed the u-joints from the IRS
> axles and have lost track of the original orientation of the u-joint
> yokes with respect to being 180 degrees one way or the other.
>
> Any comments?
>
> Did this make any sense?
>
> Don Malling
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