Spicer Driveline Installation Service Manual - Manual (Page 15)

12
Installation Techniques
Compound Angle
Vibrations
Angle Size
The magnitude of a vibration created by a universal joint operating angle is proportional to the size of the universal joint operating
angle. Spicer Engineers recommend true universal joint operating angles of 3 degrees or less.
Obtain the true universal joint operating angle, as explained above, and if it is greater than 3 degrees, compare it to this chart.
The angles shown on this chart are the maximum universal joint operating angles recommended by Spicer Engineers and are di-
rectly related to the speed of the driveshaft. Any universal joint operating angle greater than 3 degrees will lower universal joint
life and may cause a vibration. Remember to check maximum safe driveshaft RPM by using the Spicer Safe Operating Speed Cal-
culator.
Driveshaft Maximum Interaxle
RPM Operating Angle Parallel Intersecting
5000 3.2° - -
4500 3.7° - -
4000 4.2° 3.8° 3.8°
3500 5.0° 4.4° 4.4°
3000 5.8° 5.1° 4.8°
2500 7.0° 6.0° 4.8°
2000 8.7° 6.0° 4.8°
1500 11.5° 6.0° 4.8°