Spicer Driveline Installation Service Manual - Manual (Page 16)

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Installation Techniques
Multiple Shaft Installations
Multiple Shaft Set Up Recommendations
In general, multiple shaft installations follow the same guidelines, except there are different recommendations for setting up the
driveline:
• For a 2-shaft application, set up the first coupling shaft (sometimes called a jackshaft) so that the universal joint operating
angle that occurs at the transmission end is 1 to 1-1/2 degrees. (See Fig. 8)
• Try to avoid building a compound universal joint operating angle into the first coupling shaft by installing it in line with
the transmission.
• If it ends up being compound, make sure the true universal joint operating angle, determined by using the information
mentioned earlier, is 1 to 1-1/2 degrees.
Install or tilt the axle so it is mounted on the same angle as the first coupling shaft (the centerlines of the axle and the first coupling
shaft will be parallel).
Note: BY FOLLOWING THIS PROCEDURE, THE UNIVERSAL JOINT OPERATING ANGLE AT EACH END OF THE LAST SHAFT WILL
AUTOMATICALLY BE EQUAL. (See Fig. 9)
Figure 8
1 to 1-1/2
True Angle
Center
Bearing
o o