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TURBO HYDRA-MATIC 400 AUTOMATIC TRANSMISSION
7A4-45
RIGHT
WRONG
3842
Fig. 7A4-86 Installation of Teflon Rings
Fig. 7A4-87 Aligning
Pump
Cover to
Pump
Body
(1) waved steel clutch plates from the forward clutch housing.
5. Place forward clutch and turbine shaft in arbor press
and press out turbine shaft (Fig. 7A4-91).
NOTE: If removal of turbine shaft from clutch housing
is not necessary, the forward clutch piston and release
springs may still be removed by using Compressor J
23327-1 in an arbor press to compress the spring retainer
and remove its snap ring.
6. Using Compressor J 4670 with Adapters J 6129 and
J 8765, compress spring retainer and remove snap ring (Fig.
7A4-92).
7. Remove snap ring, spring retainer and sixteen (16)
clutch release springs.
C AUTI 0 N : Keep clutch release springs separate
from direct clutch piston release spnngs.
8. Remove forward clutch piston.
NOTE: The production built transmissions now use a
direct clutch without a check ball. The forward and
direct clutch pistons look almost the same. Make sure
the forward
clutch piston is identified during
disassembly so it will be reassembled into the forward
clutch housing.
NOTE: The production built forward clutch piston will
be aluminum or stamped steel.
9. Remove inner and outer clutch piston seals from
clutch piston (Fig. 7A4-93).
10. Remove center piston seal from forward clutch
housing (Fig. 7A4-94).
INSPECT FORWARD CLUTCH
1. Inspect composition and steel clutch plates for signs
of burning, scoring or wear.
2. Inspect sixteen (16) springs for collapsed coils or signs
of distortion.
3. Inspect clutch hubs for worn splines, proper
lubrication holes and thrust faces.
4. Inspect piston for cracks.
5. Inspect clutch housing for wear, scoring, open oil
passages and free operation of ball check.
6. Inspect turbine shaft:
a. Check for open lubrication passages at each end.
b. Check splines for damage.
c. Check ground bushing journals for damage.
d. Check shaft for cracks or distortion.
Assemble Forward Clutch
NOTE: Apply automatic transmission oil to all seals and
clutch plates before re-assembly.
1. Place new inner and outer oil seals on forward clutch
piston, lips face away from spring pockets (Fig. 7A4-93).
2. Place a new center seal on clutch housing, lip faces
up (Fig. 7A4-94).
3. Place Protector J 21362 over clutch hub and install
Protector J 21409 into clutch drum and install piston,
rotating piston on drum until seated (Fig. 7A4-95).
4. Install sixteen (16) clutch release springs into pockets
in piston.
5. Place spring retainer and snap ring on springs.
6. Compress springs, using Compressors J 4670, J 6129
and Ring J 8765 and install snap ring (Fig. 7A4-92).
7. Install turbine shaft in forward clutch housing, using
arbor press.
8. Install forward clutch hub washers on forward clutch
hub, making sure bronze washer is installed on side of hub
facing forward clutch housing. Retain with petrolatum.
9. Place forward clutch hub into forward clutch housing
(Fig. 7A4-90).
'10. (Models PC, PD and OC)
-
Oil and install five (5)
composition-faced, four (4) thin (.0775") flat steel and one
(1) waved plate (Plate with "U" notch), starting with waved
plate and alternating composition-faced and flat steel clutch
plates (Fig. 7A4-7E-96).
(Models PA, PB and OB)
-
Oil and install four (4)
composition-faced, three (3) thin (.0775") flat steel and one
(1) waved plate (Plate with "U" notch), starting with waved
plate and alternating composition-faced and flat steel clutch
plates (Fig. 7A4-7E-96).
NOTE: Radially grooved composition clutch plates are
installed at the factory only. All service composition
plates have the smooth surface configuration.
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