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TURBO HYDRA-MATIC 4 0 0 AUTOMATIC TRANSMISSION
7A4-57
3. Inspect governor drive gear for rough or damaged
teeth.
4. Inspect splines for damage.
5. Inspect lubrication passage.
6. Inspect drive lugs for damage.
REAR INTERNAL GEAR
1. Inspect gear teeth for damage or wear.
2. Inspect splines for damage.
3. Inspect gear for cracks.
SUN GEAR
1. Inspect gear teeth for damage or wear.
2. Inspect splines for damage.
3. Be sure oil lubrication hole is open.
SUN GEAR SHAFT
1. Inspect shaft for cracks or splits.
2. Inspect splines for damage.
3. Inspect bushings for scoring or galling. If necessary
to replace, proceed as follows:
A. SUN GEAR SHAFT BUSHING, FRONT
-
Remove:
*
With sun gear shaft properly supported, thread Remover
J 21465-14 into bushing and, using Hammer J 2619 and
Adaptor J 2619-4, remove bushing.
Replace:
Using Installer J 21465-5 with Handle J 8092, press or
drive replacement bushing into place until tool bottoms.
B. SUN GEAR SHAFT BUSHING, REAR
-
Remove:
With sun gear shaft properly supported, and using
Remover J 21465-15 with Hammer J 2619, remove bushing.
Replace:
Using Installer J 21465-5 with Handle J 8092, press or
drive replacement bushing into place until tool bottoms.
4. Inspect ground bushing journals for damage.
5. Be sure oil lubrication hole is open.
MAINSHAFT
1. Inspect shaft for cracks or distortion.
2. Inspect splines for damage.
3.
inspect
ground bushing journals for damage.
4. Inspect snap ring groove for damage.
5. Inspect mainshaft to make sure that oil lubrication
holes are open.
NOTE: If mainshaft is being replaced, remove the
orificed cup plug from the service mainshaft if it contains
one. This can be done by using a 1/4" diameter by 12"
long rod.
FRONT AND REAR BANDS
1. Inspect lining for cracks, flaking, burning or looseness.
2. Inspect bands for cracks or distortion.
3. Inspect end for damage at anchor lugs or apply lugs.
CASE EXTENSION
1. Inspect bushing for excessive wear or damage. If
replacement is necessary, proceed as follows:
a. Install Remover J 21465-17 and remove bushing.
b.
Using Installer J 21465-17 with Handle J 8092, install
new bushing flush to .010" below oil seal counterbore.
c. Stake bushing in place, using Staking Tool J 21465-10
in diamond area of bushing lube groove.
2. Inspect gasket mounting face for damage.
3. Inspect housing for cracks or porosity.
4. Be sure rear seal drain-back port is not obstructed.
MODULATOR AND VALVE
1. Inspect modulator assembly for any signs of bending
or distortion (Fig. 7A4- 128).
-MODULATOR
CAN
ROLL MODULATOR O N FLAT SURFACE TO DETERMINE IF THE
SLEEVE ISCONCENTRIC TO THE MODULATOR CAN.
IF THE SLEEVE IS BENT,RUNOUT WILL B E VISIBLE.
2701
Fig.
7A4-128
Checking Concentricity
of Sleeve
a. Roll main body of modulator on a flat surface and
observe the sleeve for concentricity to the body.
b. If sleeve is concentric and the modulator valve is free
within the sleeve,the modulator is acceptable.
2. Inspect O-ring seal seat for damage.
3. Check for vacuum diaphragm leakage as follows (Fig.
7A4- 129):
a. Insert a pipe cleaner into vacuum connector pipe as
far as possible and check for presence of transmission fluid.
b. If transmission fluid is found on pipe cleaner, replace
the modulator.
NOTE:
Gasoline or water vapor may settle in
vacuum side of diaphragm. If this is found without
presence of transmission fluid, modulator should not be
changed.
4. Make a bellows comparison check by using the
Modulator Bellows Checking Gage J 24466 and compare the
load of a known good modulator of the same part number
with the modulator in question, as follows:
a. Install known good modulator into one end of the
gage.
b. Insert modulator in question into the opposite end of
the gage and then press the two modulators together.
c. A non-conforming modulator bellows will be
indicated if there is no color showing in the center groove of
the gage. If the bellows of the suspected modulator is good,
then there will be a color band appear in the center groove
of the gage.
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