Advance Adapters SATURN - Manual (Page 9)

New design Old design
SPECIAL CONSIDERATIONS:
The photo below represents the snap ring, lock ring, and retaining nut that fastens the planetary gear assembly to your transfer
case. These items are only accessable once the case assembly has been removed. To remove the case assembly, unbolt the
five (5) 3/8” bolts. The case assembly should then be removed. (NOTE: On high mileage units, the unit may be difficult to
seperate. This is due to the caged needle bearing that was originally pressed into the planetary hub. DO NOT dissassemble the
case assembly from the bearing cap inward.)
Once the case assembly has been removed, you should have access through the middle of the planetary housing to remove the
snap ring, lock ring, and nut. See illustration below. Whenever the snap ring and lock ring are removed, they should be replaced
with new components.
Step C5
Thoroughly clean and inspect all parts. Replace any if nec-
essary. Reassemble the case assembly in the reverse or-
der.
Step C6
Be certain that the notches in the rear synchro-rings are
aligned with the shifter dogs when assembling. To properly
retain the outer brass synchro-ring during assembly, we rec-
ommend using a quality grease to hold this ring in position.
All internal components should be lubricated during reas-
sembly using SAE 90w gear oil. Remember to install the oil
scoop, as it is crucial for proper oiling of the unit.
The design of the planetary housing has under-
gone a few changes from the early Warn & Saturn
units.
One of the biggest problems when installing &
removing this unit from a vehicle is the caged
needle bearing that rides on the 6 spline shaft.
This bearing required a pressed fit when installed
into the planetary housing.
Today we have designed the planetary hub and
the 6 spline shaft to simplify the installation & re-
moval. Instead of the caged bearing being pre-
installed on the 6 spline shaft, we now install it
first in the planetary hub. This required a snap
ring groove machined in the planetary hub. The
retaining hub on the 6 spline shaft was removed.
Current production of these 6 spline shafts, with
the use of the older style planetary hub, will re-
quire this snap ring groove to be machined. Refer
to the illustration on the left.