Pinion Installation - Chevrolet 1991 Light Duty Truck Repair Manual

4C2-10 9 3/4-INCH RING GEAR FRONT AXLE
Figure 27—Scooter Gage on the Arbor
• This reading indicates the amount of shims
needed for a nominal pinion setting. The pinion
marking may change the pinion depth by
adding or deleting shims from the nominal pin­
ion setting.
• A positive (+) pinion marking indicates that the
distance between the ring gear centerline and the
pinion head must increase by the number of thou­
sandths marked on the pinion. This means that the
shim pack will decrease by the same number of
thousandths.
• A negative (-) pinion marking indicates that the
distance between the ring gear centerline and the
pinion head must decrease by the number of thou­
sandths marked on the pinion. This means that the
shim pack will increase by the same number of
thousandths.
• A pinion etched zero (0) will use the nominal set­
ting as determined in this procedure.
9. Measure each shim separately with a micrometer
and add them together to obtain the total shim
pack thickness. If a baffle (5) or slinger is used,
these must also be measured and included in the
shim pack (figure 28).

PINION INSTALLATION

|-»+-| Install or Connect
Tools Required:
J 7818 Front Pinion Bearing Cup Installer
J 5590 Rear Pinion Bearing Cone Installer
D 111
J 8092 Handle
J 8614-01 Pinion Flange Remover
D 116-1 Pinion Height Block
D 116-2 Master Disc
D 115-3 Master Disc
D 115 Scooter Gage
D 163 Seal Installer
1. Place the required amount of shims (and baffle if
used) in the inner bearing bore.
Figure 28—Measuring the Shim s
Figure 30—Installing the Pinion Front Cup
F4718