Spicer Drive Axles Service Manual G & M - Manual (Page 17)

Pinion position is based on the mounting distance
measured from the centerline of the ring gear to the
back of the pinion head (See Illustration, top of next
column). This dimension is controlled by shimming
between the oil slinger seal and pinion head with a
pinion position spacer (selective).
On the nose of each pinion either a plus (+), minus (-),
or a zero (0) will be etched.
See Gear Set Identification,
Pg. 2. This number represents the amount in thou-
sandths of an inch (.001) to be added or subtracted
from the nominal mounting dimension for the best
running position for that particular gear set.
Ring gears and pinions are supplied in matched sets only.
Matching numbers on both the pinion and ring gear are
etched for verification. If a new gear set is being used,
verify the number of each pinion and ring gear before
proceeding with assembly.
See Gear Set Identification,
Pg. 2.
Beginning with carriers GGA-1007032 and MJA-1007160,
a new method of setting pinion position has been
adopted. A number is etched on the machined surface
under the roller bearing retainer plate on each carrier.
This number is used in conjunction with the number
etched on each pinion to determine the proper pinion
bearing spacer (selective) for proper assembly.
It
eliminates the need for measuring with special gauge
tools.
See Figure 7.
15
FFFFFigur igur igur igur igure 7 e 7 e 7 e 7 e 7
Pinion Oil Slinger
Centerline
of Ring Gear
Nominal
Mounting Distance
PINION POSITION
A plus (+) number etched on the pinion would mean
that number must be added to the nominal mounting
distance to get the required mounting distance.
EXAMPLE:
If pinion is etched +3, the required mounting
distance is more than nominal by .003 in. (.076
mm). This means the pinion would require .003 in.
(.076 mm)
thinner shim between pinion and oil
slinger seal than a pinion etched with "0" to allow
for this difference. To achieve proper pinion
position, decrease the pinion position spacer
thickness by .003 in. (.076 mm).
Similarily, if the pinion is marked -3, the shim
required between pinion and oil slinger seal would
be .003 in (.076 mm)
thicker than if pinion was
etched "0" to allow for this distance. To acheive
proper pinion position, increase the pinion position
spacer thickness by .003 in. (.076 mm).
The number etched on the carrier also refers to the
mounting distance, based on a "0" etched pinion.
This number represents thicness in thousandths of
the pinion position spacer (selective) required for a
"0" etched pinion.