Chevrolet 10 series 1973, Overhaul Manual

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A U T O M A T IC T R A N S M I S S I O N 7A-53
10. Check valve opening at entry and exhaust (.020
inch minimum).
Governor Driven Gear Replacement
To facilitate governor repair in the field, a governor
driven gear and replacement pins are available for
service use. The service package contains a nylon driven
gear, two governor weight retaining pins and one
governor gear retainer split pin. Replacement of gear
must be performed with care in the following manner:
1. Drive out governor gear retaining split pin using
small punch.
2. Support governor on 3/16 inch plates installed in
exhaust slots of governor sleeve, place in arbor
press, and with a long punch, press gear out of
sleeve.
3. Carefully clean governor sleeve of chips that
remain from original gear installation.
4. Support governor on 3/16 inch plates installed in
exhaust slots of sleeve, position new gear in sleeve
and, with a suitable socket, press gear into sleeve
until nearly seated. Carefully remove any chips that
may have shaved off gear hub and press gear in
until it bottoms on shoulder.
5. A new pin hole must be drilled through sleeve and
gear. Locate hole position 90 degrees from existing
hole, center punch and then, while supporting
governer in press, drill new hole through sleeve and
gear using a standard (1/8 inch) drill.
6. Install split retaining pin.
7. Wash governor assembly thoroughly to remove any
chips that may have collected.
Assembly
1. Install governor valve in bore of sleeve, large land
end first.
2. Install governor weights and springs, and thrust cap
on governor sleeve.
3. Align pin holes in thrust cap, governor weight
assemblies and governor sleeve, and install new
pins. Crimp both ends of pins to prevent them from
falling out.
4. Check governor weight assemblies for free
operation on pins.
5. Check governor valve for free movement in
governor sleeve.
BUSHING REPLACEMENT
Extension Housing Bushing
Remove extension housing bushing from housing using
tool J-21424- 9 with drive handle J-8092. Install extension
housing bushing in housing flush to .010 below seal
counter bore surface using tool J- 21424-9 with drive
handle J-8092 (fig. 94M).
Fig. 9 4 M --ln s ta llin g Extension Housing Bushing
Output Shaft Bushing
With output shaft properly supported, remove bushing
using remover J-9534-01 and slide hammer J-7004 (fig.
95M). Using tool J- 23062-7, install bushing until tool
bottoms on output shaft.
Case Bushing
With case properly supported, drive out bushing from
rear of case using tool J-23062-1 and drive handle
J-8092. Using tool J-23062-1 and drive handle J-8092
with extension J-21465-13, install bushing from interior
of case to 3/16" from front surface with split in bushing
located at governor pilot upper bore wall area.
Fig. 9 5 M -R e m o vin g O utput S haft Bushing
J-8 0 9 2
J-2 1 4 2 4 -9
E X TE N SIO N
H O U S IN G
OUTPUT RING GEAR
OUTPUT SHAFT
J-9534
J-2619-4
ADAPTER
SLIDE HAMMER
OVERHAUL MANUAL