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7-46
GROUP 7-AUTOMATIC TRANSMISSION
STATOR TO IMPELLER
INTERFERENCE CHECK
1. Position a stator support shaft
on the bench with the spline end of
the stator shaft pointing up (Fig.
1
0).
2. Place the front pump rotor
over the stator shaft
with.
the flat
side of the rotor down.
3. Place the converter over the
stator &upport shaft so that the front
pump flats are in normal (running)
engagement with the pump rotor.
The converter pump driving hub
will bottom the rotor.
4. While holding the stator shaft
stationary, try to rotate the converter
counterclockwise. The converter
should rotate freely without any
signs of interference or scraping
within the converter assembly.
S. If there is an indication of
scraping, the trailing edges of the
stator blades may be interfering with
the leading edges of the impeller
blades. In such cases, replace the
converter.
STATOR TO TURBINE
INTERFERENCE CHECK
1. Position the converter, front
side down, on the bench.
2. Install the front pump
as-
sembly (complete) to engage the
mating splines of the stator support
and stator, and pump drive gear
flats.
3. Install the input
shaft,
engag-
ing the splines with the turbine hub
(Fig.
11).
4. While holding the pump sta-
tionary, attempt to rotate the
turbine with the input shaft. The
turbine should rotate freely in both
directions without any signs of
interference or scraping noise.
5.
If
interference exists, the stator
front thrust washer may be worn,
allowing the stator to hit the
turbine. In such cases, the converter
must be replaced.
FRONT PUMP AND STATOR
SUPPORT
1. Inspect the clutch drum journal
for wear and roughness.
2. Check the side clearances
between the clutch apply pressure
seal rings and their grooves in the
stator support. These clearances
should be between 0.0035 and
0.0045
inch.
3. Remove the clutch apply rings
and install them in their normal
running position in the clutch drum.
Then check the ring gaps. This ring
gap clearance should be between
0.002 and 0.009 inch.
4. Inspect the input shaft bushings
in the stator support shaft for wear.
Check the oil ring grooves in the
stator support for nicks, burrs or
damaged edges. Check the gasket
mating surface of the pump body
for damaged surface.
S. Inspect the converter pump
drive hub bushing in the front pump
housing. Inspect the pump seal in
the pump housing for defects that
would cause fluid leakage.
GOVERNOR
1. Inspect the governor valves
and housing for wear. Crocus cloth
may be used to polish the valves if
care is taken to avoid rounding the
sharp edges.
2. Install the governor valves in
the governor housing and check
them for free movement. Each valve
should fall of its own weight when
dry.
CLUTCH ASSEMBLY
1. Inspect the composition clutch
plates for
·
damage. These plates
should be flat. If the plates are not
flat, they must be
replaced.
If the
old plates are to be re-used, they
must not be cleaned in a vapor de-
greaser or cleaned with any type of
detergent solution. Wipe them clean
with lint-free towels.
If new composition plates are to
be installed, soak them in automatic
transmission fluid for at least
15
minutes before assembling them in
the clutch drum. This soaking
prevents damage to the plates during
the transmission fluid fill period and
initial running-in.
2. Inspect the steel clutch plates.
These clutch plates should also be
flat. If they are not flat, they should
be
replaced.
3. Inspect the clutch release
springs for being broken or dis-
torted.
4. Inspect the clutch piston ball
check valve for free movement and
proper seating. Make sure the
orifice in the clutch piston is open.
S. Inspect the clutch drum bush-
ing for wear.
CONTROL VALVE BODY
1. Inspect all valve and plug
bores for scores. Check all fluid
passages for obstruction. Inspect
the check valves for free movement.
Inspect all mating surfaces for burrs
or distortion. Inspect all plugs and
valves for burrs and
scores.
Crocus
cloth can
be
used to polish valves
and plugs if care is taken to avoid
rounding the sharp edges of the valves
and plugs.
2. Inspect all springs for distor-
tion. Check all valves and plugs for
free movement in their respective
bores. Valves and
plugs,
when dry,
must fall from their own weight in
their respective
bores.
PINION CARRIERS
1. The pins and shafts in the
planet
assemblies
should be checked
for loose fit and/or complete dis-
engagement.
Replacement,
using a
new planet assembly, should be
made if either condition is found to
exist.
2. Inspect the pinion gears for
damaged or excessively worn areas.
3. Check for free rotation of the
pinion
gears.
4. Inspect the front planet
thrust
surface for excessive wear.
SERVO-ASSEMBLIES
1. Inspect the servo piston and
seals for defects that would cause
hydraulic leakage.
2. Inspect the cover seal and
gasket cover sealing surface for
defects.
CASE
1. Inspect the case for cracks.
2. With an air hose, check all
fluid passages for obstruction or
cross leakage.
3. Check all case linkage parts for
free travel and proper engagement.
4. Check the vent passage for
obstructions with an air hose.
ONE-WAY CLUTCH
1. Inspect the outer and inner
races for scores or damaged surface
area where the rollers contact the
races.
2. Inspect the rollers and springs
for excessive wear or damage.
3. Inspect the spring and roller
cage for bent or damaged spring
retainers.
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