GMC chervolet camaro 1999 Service Manual page 70

General Information
182332
Record the readings on a diagram like the one shown
as you proceed through the measurements.
Evaluation
The two working angles in a one-piece propeller shaft
system should be equal to within V2 of a degree for
effective cancellation.
Measuring Two-Piece Propeller Shaft System
Working Angles
Two-piece propeller shaft systems have three working
angles instead of two working angles as in the ·
one-piece systems.
..___....,
6
182335
• The first angle is the front working angle (8). It is
formed by the angle of the output shaft of the
transmission and the angle of the front
propeller shaft.
• The second angle (7) is the middle working angle. It
is formed by the angle of the front propeller shaft
and the angle of the rear propeller shaft.
Vibration Diagnosis and Correction 0-67
• The third angle (6) is the rear working angle. It is
formed by the angle of the rear propeller shaft and
the angle of the pinion yoke of the rear axle.
If the launch shudder or the second-order driveline
vibration is still present, measure and correct the
driveline angles.
Measuring Two-Piece Propeller Shaft Working
Angles
This procedure is essentially the same as for the
one-piece propeller shafts. You must, however, take
into account the third angle.
1. Place the inclinometer on the propeller shaft
bearing cap .
2. Center the bubble in the sight glass.
6499
6502
3. Record the measurement. The bearing cap must
be straight up and down in order to obtain an
accurate measurement.
4. Enter the measurements on your diagram.