GMC 1976 ZEO 6083 Maintenance Manual page 520

7- 72 TRANSMISSION
Figure 108-Installing Fixture J-21371-8
WARNING : ALWAYS RELEASE AIR PRESSURE
BEFORE REMOVING VALVE, AS A DEFINITE
HAZARD EXISTS SHOULD VALVE BLOW OUT
DURING REMOVAL.
e. Thoroughly dry converter.
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:
Figure 1 10-Converter Assembly - Cross Section
Figure 109-Checking Converter End Play
a. Fully release collet end of Fixture J-21371-
8 by turning its cap nut clockwise.
b. Install collet end of Fixture J-21371-8 into
converter hub until it bottoms, then tighten its cap
nut to 5 lb . ft ., Figure 108.
c. Install Fixture J-21371-3 and tighten the
hex nut to 3 lb . ft .
d. Install Indicator J-8001 and set it for
"zero" while its plunger rests on the cap nut of Fix-
ture J-21371-8.
e. Loosen hex nut while holding cap nut sta-
tionary, allowing converter internal assembly to
THRUST RACE (Z)
THRUST RACE (L)