Buick LeSabre 1965 Service Manual page 424

6-58
PROPELLER SHAFT, 45, 46, 4 8 , & 4 9 0 0 0 SERIES
7. Reinstall differential carrier
nuts and torque to 50 ft. lbs.
6-29 ADJUSTMENT OF
UNIVERSAL JOINT
ANGLES-49000
Because of the constant velocity
joints at the center and rear of
the 49000 propeller shaft, the car
is not sensitive to pinion angle
adjustment. Therefore, no adjust-
ment is necessary. However, if
rear CV joint bottoms on under-
body, or if propeller shaft is
rubbing on the frame tunnel, ad-
justment must be made to provide
sufficient clearance. Adjustment
can be made using tools and pro-
cedure as described in preceding
paragraph differing only in ad-
justment of vernier upper control
arm. Adjust vernier arm as
shown in Figure 6-115.
6 - 3 0 PROPELLER SHAFT
BALANCING
PROCEDURE
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.
2. Balancing at the center of the
propeller shaft just rearward of
the CV Joint is all that is norm-
ally required. It is often possible
to locate the heavy side of the
shaft by holding a c r a y o n or
colored pencil close to the shaft
while the shaft is rotating (speed-
ometer indicating 40-50 MPH.)
and carefully bringing the crayon
upwards until it just contacts this
rotating shaft. If carefully done,
the heavy side (point of maximum
runout) only will be marked by
the crayon. This normally gives
a good indication of which side of
the shaft is heavy for unbalance,
and serves as a starting point for
initial l o c a t i o n of the hose
clamps.
MOUNTING BOLTS
PROPELLER SHAFT-
5/16"
11/4'
HOLE DRILLED HERE
FROM CENTER LINE
Figure 6-116—Locating Access Hole in Frame—49000 Series
3. Install two (2) Wittek #28 hose
clamps (Gr. 1.166, Part #1351813)
on the rear propeller shaft and
slide them f o r w a r d until the
clamps stop at the nearest bal-
ance weight welded to the tube.
This involves working the clamps
into the frame tunnel with the
fingers.
4. On 49000 only, to provide an
access hole in the frame tunnel
for inserting a screwdriver to
tighten the hose clamps, drill a
5/16" hole located as follows:
Measure from the rear of the
frame tunnel forward to the first
welded-on balance weight. Sub-
tract 1/2" from this measure-
ment; then using this distance,
measure from the rear of the
frame tunnel forward and mark
m
this distance on the bottom out-
side frame tunnel. This locates
HOSE CLAMPS
(HEADS 180° FROM
CRAYON MARK
SEAR
PROPELLE
SHAFT
Figure 6-117—Hose Clamps in Place Opposite Crayon Mark