Chevrolet 1977 10 Series, Repair Manual, Page: 82 / 468

4B-10
OVERHAUL MANUAL
Fig. 4 B -1 7 —In s ta llin g P in io n Rear B e a rin g C up
3. Position gauge plate J-2 1777-29 on preload stud J-
21777-43 (8-1/2" and 8-3/4" ring gear) J-23597-11 on
preload stud J-2 1777-43 (7-1/2" ring gear), insert stud
through rear bearing and pilot J-2 1777-35 (8-1/2" and 8-3/4"
ring gear) J-23597-12 (7-1/2" ring gear) and through front
bearing and pilot J-2 1777-42. Insert the hex nut until snug
and rotate the bearings to make sure they are properly seated.
See figure 4B-19 for illustration of proper positioning.
4. Hold the preload stud stationary with a wrench on
the flats and tighten hex nut until 20 in. lbs. of torque are
required to rotate the bearings as shown in figure 4B-20.
5. M ount the side bearing discs J-2 1777-45 on the ends
of arbor J-2 1777-1 (8-1/2" and 8-3/4" ring gear). Side
bearing discs J-21777-45 on the ends of arbor J-23597-1 (7-1/
2" ring gear), using the step of the disc that corresponds to
the base of the carrier.
6. Place the arbor and plunger assembly into the carrier,
being sure the side bearing discs are seated properly.
7. Install the bearing caps finger tight to prevent the
discs from moving.
8. Position dial indicator J-8001 on the m ounting post
Fig. 4 B -1 9 --G a u g e Plate In s ta lle d
of the arbor with the contact button resting on the top surface
of the plunger.
9. Preload the dial indicator one half revolution and
tighten in this position.
10. Place the plunger onto the guage plate. For 8-1/2"
and 8-3/4" ring gear select the button on the gauge plate that
corresponds to the ring gear size and rotate the plate until
the plunger rests directly upon th at button.
11. Rock the plunger rod slowly back and forth across
the button until the dial indicator reads the greatest
deflection. A t this point, set the dial indicator to zero. Tools
will now be positioned as shwon in figure 4B-21.
NOTE:
Select the gauging button that corresponds to
the ring gear size for the 8-1/2" and 8-3/4" ring gear.
It is im portant to use a dial indicator correctly when
determining pinion depth requirements. Be sure to
record the num ber indicated by the indicator needle; do
not record the am ount of travel of the needle.
A fter "zeroing" the dial indicator on the highest
point of deflection on the gauge plate, the indicator
probe is swung off the gauge plate, allowing the needle
Fig. 4 B -1 8--InstalIing Pinion Front Bearing Cup Fig. 4B-20--M easuring Rotating Torque