Chevrolet 1980 Light Duty Truck Repair Manual page 302

(4 0 0)7A -1 6 A U TO M A TIC TR A N S M IS S IO N S
F i g . 7 A - 5 5 C ~ R e m o v i n g S t e e l S p e e d o m e t e r D r i v e G e a r
output shaft, and remove speedom eter drive gear (fig. 7A-
55C).
2. Install new steel speedom eter drive gear and drive
to location 5-21/32" below end o f output shaft for all
m odels. (Fig. 7A -56C ).
G O V E R N O R A S S E M B L Y
A ll com ponents o f governor assembly, w ith exception
o f driven gear, are a select fit and each assembly is
calibrated. The governor, including the driven gear, is
Fig. 7A-56C --lnstalling Steel Speedometer Drive Gear
serviced as a com plete assembly. H ow ever, the driven gear
can also be serviced separately.
order to replace driven gear. D isassem bly may also be
necessary
operation. In such cases, proceed as follows:
D isassem bly
rem ove pins, governor thrust cap, governor weights, and
springs. G overnor w eights are interchangeable from side to
side and need not be identified. (Fig. 7A -57C ).
careful not to dam age valve.
driven gear, if necessary.
Inspection
out all passages.
INSTALLER
galling.
SPEEDOMETER
DRIVE GEAR
transm ission case.
galling.
governor sleeve.
damage.
governor sleeve.
damage.
retainers.
F ig . 7 A - 5 7 C ~ G o v e r n o r ~ E x p l o d e d
It is necessary to disassem ble governor assembly in
due to foreign m aterial
1. Cut o ff one end o f each governor weight pin and
2. R em ove governor valve from governor sleeve. Be
3. Perform follow ing inspections and replace governor
1. W ash all parts in cleaning solvent, air dry and blow
2. Inspect governor sleeve for nicks, burrs, scoring or
3. C heck governor sleeve for free operation in bore o f
4. Inspect governor valve for nicks, burrs, scoring or
5. Check governor valve for free operation in bore o f
6. Inspect governor driven gear for nicks, burrs, or
7. Check governor driven gear for looseness on
8. Inspect governor w eight springs for distortion or
9. C heck governor w eights for free operation in their
causing im proper