UNIVERSAL JOINT PHASING (See Fig. 37)
When U-joints or yokes are assembled to their
shafts in the same plane, they are in phase. When they
are assembled to the shaft in different planes, they are
out of phase. To obtain vibration free operation, check
Yokes or flanges between the main and auxiliary
transmission must be "In Phase".
In the case of a two-piece driveshaft assembly,
between the transmission (Main or
Auxiliary) and the forward rear axle, the
joints on this shaft should be assembled "In
Phase", unless otherwise specified by the
manufacturer of the vehicle.
The inter-axle driveshaft yokes must be "In
If a vehicle has driveshafts that do not have
intersecting angles but parallel angles
throughout the drive line system, the yokes
or flanges must be held parallel to within 1
deg. of each other.
CTS-4017 - Page 21
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