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TURBO HYDRA-MATIC 400 AUTOMATIC TRANSMISSION
7A4-59
6. Inspect governor assembly bore for scratches or
scoring.
7. Inspect modulator valve bore for scoring or damage.
8. Inspect for missing or loose intermediate clutch cup
plug (see Fig. 7A4-131 for location). If necessary to install
a cup plug, proceed as follows:
a. Place transmission case in holding fixture and position
with its front end facing up.
b. Make sure that the intermediate clutch cup plug hole
is free of dirt, chips, etc.
c. Place intermediate clutch cup plug (Group 4.103, Part
No. 861 1710 or equivalent) into its passageway in the case,
open end of the plug out.
d. Drive plug until flush or slightly below top of hole,
using a 3/8" diameter by 10" long rod.
CAUTION: Make certain that rod used is large
enough in diameter to locate on the lip edge o f the
plug, not the bottom o f the plug.
9. Inspect case bushing. If necessary to replace, proceed
as follows:
a. Remove
-
with case properly supported and using
Remover J 21465-8 with Handle J 8092, remove bushing.
b. Replace
-
Use Installer J 21465-8, Ring J 21465-9,
Handle J 8092 and Extension J 21465-13. With its lube
passage facing front of case, drive the bushing into case until
it is .04OW-.055" above the selective thrust washer face. Stake
bushing with Staking Tool J 21465-10, with stake marks in
the lube grooves.
CONVERTER ASSEMBLY
1. Inspect inside of bell housing. If covered with oil, a
converter leak is indicated and converter should be leak tested
as follows:
a. Drain oil out of converter.
b. Install Fixture J 21369 and tighten.
c. Fill converter with 80 psi of air (Fig. 7A4-133).
d. Submerge in water and check for leaks.
2. Check converter hub surfaces for signs of roughness,
scoring or wear that could damage the oil pump front seal.
If roughness can be felt with a fingernail, seal could be
damaged.
3. Check converter for loss of balance weight or a broken
converter-to- crankshaft pilot. If balance weight is off or pilot
is broken, replace the converter.
4. Check converter end play as follows:
a. Fully release collet end of Fixture J 2 137 1-2 by turning
its cap nut clockwise.
b. Install collet end of Fixture J 2 1371-2 into converter
hub until it bottoms, then tighten its cap nut to 5 lb. ft. (Fig.
7A4- 134).
c. Install Fixture J 21371-3 and tighten the hex nut to
3 lb. ft. (Fig. 7A4-135).
d. Install Indicator J 8001 and set it for "zero" while its
plunger rests on the cap nut of Fixture J 2 137 1-2.
e. Loosen hex nut while holding cap nut stationary,
allowing converter internal assembly to lower, until dial
indicator shows that internal assembly has bottomed (Fig.
7A4- 136).
Fig.
7A4-133
Pressurizing Converter
Fig.
7A4-134
Installing Fixture
J-2 137 1-2
f. The reading obtained on dial indicator represen
converter end clearance. If clearance is less than .05OW, tl
ts
le
converter is acceptable. If clearance is .050" or more, replace
the converter.
5. If fluid in the converter has the appearance of having
been mixed with "aluminum paint", converter is damaged
internally and must be replaced.
6. Do not change the converter if non-conformity in
some other part of the transmission has resulted in the
converter containing dark, discolored fluid. The full flow
filter is designed to remove all harmful residue from non-
conforming parts, other than converter and/or pump non-
conformities before the oil is pumped into the converter.
7. Check the converter internally for damage to its roller
bearings, thrust races and the roller clutch (Fig. 7A4-137):
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