Chevrolet 70 1969 Series, Shop Manual

Page: 191 / 913

REAR SUSPENSION 4D-52
Figure
7—
Checking Pinion Angles
is centered in glass. Reposition protractor on yoke
as shown in View D, figure 6, holding in line with
shaft, and note the shaft angle. This shaft angle
must be held within a maximum of 1° less than the
engine and auxiliary transmission angles, i.e., if
engine and transmission angles are 3°45', shaft
angle must be within 2°45' minimum to 3°45' m ax­
imum.
b. The shaft angle can be adjusted, if neces­
sary, by raising or lowering the auxiliary trans­
mission by taking an equal number of turns at each
of the adjustable mounting bolts on some vehicles.
On other vehicles it will be necessary to add or
subtract plates, washers, spacers, etc., to raise
or lower the auxiliary transmission.
N O T E : It is important to make adjustment at
each mounting bolt an equal amount so the auxil­
iary transmission angle will not be changed.
4 m
FRONT
MEMBER IS DETERMINED W H EN PROPER AXLE
DRIVE PIN IO N ALIG N M EN T IS OBTAINED
ROCKWELL SLHD A N D SQ H D
T-3044
Figure 8 — Torque Rods Installed at Frame
Cross-Member with Shims Installed
6 . On rear axles which have a machined sur­
face on the differential carrier at right angles to
the pinion shaft, such as 2-speed shift motor adap­
ter, check angle of the forward rear axle pinion
by cleaning the two-speed adapter cover and plac­
ing the protractor as shown in View E, figure 6 .
Make sure protractor is held straight up and down
to get a correct angle reading. Pinion angle should
be the same as the engine and auxiliary transmis­
sion angles. Adjustment can be made, if necessary,
on some vehicles by adjusting the adjustable upper
torque rod. On other vehicles adjustment can be
made, if necessary, by using shims at upper torque
rod mountings.
7. On rear axles that do not have a machined
surface on the differential carrier housing it will
__________ rr 'h ■
( SOLID
I TORQUE ROD
ADJUSTABLE
TORQUE ROD
EATON 30DSC A N D 34DSC ROCKWELL SLHD A N D SQHD
TYPICAL O N ALL J A N D M MODELS
EATON 34DSC
T-3036
Figure 9— Typical Torque Rods Installed (Adjustable Type)
CHEVROLET SERIES 70-80 H EAVY DUTY TRUCK S H O P M A N U A L