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PROPELLER SHAFT
4A-7
PROP SHAFT
Fig. 4A-6 Measuring Angle at Front Propeller Shaft
Bearing Cup
SLIP Y O K E
Fig. 4A-7 Measuring Angle at Front Slip Yoke Bearing
CUP
STROBE LIGHT
-
WHEEL BALANCE
AND HOSE CLAMP METHOD
If a wheel balancer of the type that is equipped with a
strobe light is available, the use of such a unit will facilitate
the balancing of the drive shaft. The balance pick-up unit
should be placed directly under the nose of the rear axle
carrier and as far forward as possible.
1. Place the car on a twin post hoist so that the rear of
the car is supported on the rear axle housing and the rear
wheels are free to rotate. Lower rear post hoist and allow axle
tube to rest on axle stands. The vee groove of the rear post
hoist could clamp the axle and destroy the sensitivity of the
operation. Remove both rear tire and wheel assemblies and
reinstall wheel lug nuts with flat side next to drum.
2. Mark and number drive shaft at 4 points, 90 degrees
apart, at rear of shaft just forward of balance weights as
shown in Fig. 4A-10.
3. Place strobe light wheel balancer pick-up under the
nose of the differential (Fig. 4A-11).
Fig. 4A-8 Balance Hose Clamps in Place
I
ROTATING CLAMP HEADS
Fig. 4A-9 Rotating Balance Hose Clamps
the reference numbers will be in the same position as was
noted while the shaft was rotating.
CAUTION: Never run car higher than 55 mph.
Do not run car on hoist for extended periods due
to danger of overheating the transmission or
engine. All personnel stay clear of driveline, joint
and balance weight area.
When strobe light flashed, the heaviest point of the shaft
was down (6 o'clock) and to balance this shaft, it will be
necessary to apply the balancing weight 180 degrees away
from the heaviest point or at the top of the shaft (12 o'clock).
4. With car running in gear at car speed where
disturbance is at its peak, allow the driveline to stabilize by
holding at constant speed. Point strobe light up at the
spinning shaft and note position of one of these reference
numbers. Shut off engine and position the drive shaft so that
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