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TRANSMISSION-TORQUEFLITE
21 -99
for nicks, burrs, scores or other damage. Light
scratches, small nicks or burrs can be removed with
crocus cloth or a fine stone. Inspect the speedometer
drive gear for any nicks or burrs, and remove with a
sharp edged stone. Make sure all oil passages in the
shaft are open and clean.
Inspect bushings in sun gear for wear or scores,
replace sun gear assembly if bushings are damaged.
Inspect all thrust washers for wear and scores, re-
place if damaged or worn below specifications. In-
spect thrust faces of planetary gear carriers for wear,
scores or other damage, replace as required. Inspect
planetary gear carrier for cracks and pinions for bro-
ken or worn gear teeth, and for broken pinion shaft
lock pins. Inspect annulus gear and driving gear
teeth for damage. Replace distorted lock rings.
Assembly
Refer to Figure 103 for parts reference.
(1) Place the rear annulus gear support in the an-
nulus gear and install the snap ring.
(2)
Position the rear planetary gear assembly in
the rear annulus gear and place the thrust washer on
the front side of the planetary gear assembly.
(3) Insert the output shaft in the rear opening
of
the rear annulus gear. Carefully work the shaft
through the annulus gear support and planetary gear
assembly. Make sure the shaft splines are fully en-
gaged in splines of the annulus gear support.
(4)
Install the steel washer and snap ring on one
end of the sun gear. Insert the sun gear through the
front side of the driving shell, install the rear steel
washer and snap ring.
(5) Carefully slide the driving shell and sun gear
assembly on the output shaft, engaging the sun gear
teeth with the rear planetary pinion teeth.
(6) Place the front annulus gear support in the an-
nulus gear and install the snap ring.
(7) Position the front planetary gear assembly in
the front annulus gear, place thrust washer over the
planetary gear assembly hub and install the snap
ring. Position the thrust washer on the rear side of
the planetary gear assembly.
(8) Carefully work the front planetary and annulus
gear assembly on the output shaft, meshing the plan-
etary pinions with the sun gear teeth.
(9) With all components properly positioned, in-
stall selective snap ring on front end of the output
shaft. Remeasure the end play of the assembly.
NOTE:
The clearance can be adjusted by the use
of various thickness snap rings. Snap rings are
available in
.040-.044, .048-.052
and
.059-.065
inch
thickness.
PLANETARY GEAR ASSEMBLIES,
SUN GEAR, DRIVING SHELL-A-727-A
AND B
Measure the end play of the planetary gear assem-
blies, sun gear and driving shell before removing
these parts from the output shaft. With the assembly
in an upright position, push the rear annulus gear
support downward on the output shaft. Insert a feel-
er gauge between the rear annulus gear support hub
and the shoulder on the output shaft (Fig.
102).
The
clearance should be .010 to .039 inch. If clearance
exceeds specifications, replace thrust washers and/or
necessary parts.
FRONT
SNAP RING
ANNULUS GEAR
DRIVING SHELL
(SELECTIVE)
REAR
ASSEMBLY
SNAP
RING
THRUST WASHER
OUTPUT SHAFT
LOW AND REVERSE DRUM
N K 144
Fig. 104-Planetary
Gear Assemblies, Sun Gear,
Driving Shell, Low-Reverse Drum and Output
Shaft-Disassembled
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