Chevrolet 1977 10 Series, Repair Manual, Page: 250 / 468

(200)7A-14 OVERHAUL MANUAL
CUP PLUG
SPEEDOMETER OUTPUT SHAFT
DRIVE GEAR
SPEEDOMETER
DRIVE GEAR CLIP
Fig. 7 A - 5 8 A - O u t p u t S h a ft
Fig. 7 A - 5 5 A - l n s t a l l i n g Park in g Pawl Cup Plug
Fig. 7 A - 5 6 A - l n s t a l l i n g Park in g Pawl Rod
4.0mm (5/32"). The shaft also has the same size holes
at the rear speedometer gear location.
1. Inspect journals and snap ring grooves for wear or
damage.
2. Inspect lubrication passages for being plugged or
damaged.
3. Inspect splines for damage.
4. Inspect governor drive gear for rough or damaged
teeth.
5. Inspect speedometer drive gear for rough or
damaged teeth and also the clip for damage.
6. If necessary to replace speedom eter drive gear,
proceed as follows:
a. Depress speedometer drive gear clip.
b. Remove gear and clip, tapping gear lightly with
plastic hammer.
NOTE:
Make sure speedometer drive gear is located
so speedometer driven gear will mesh with it.
c. Place speedometer drive gear clip with the tanged
end in the correct hole in the output shaft (Fig. 7A-59A).
d. Align the slot of the speedom eter drive gear with the
clip and install the gear.
7. If necessary, remove rear internal gear to output
shaft snap ring. If damaged, replace with a new snap ring
(Fig. 7A-58A).
Rear Internal Gear
1. Inspect rear internal gear, splines, teeth and bearing
surface for wear, cracks or damage.
RETAINING
PIN
IDENTIFICATION
GROOVE
PIN GROOVE
M A N U A L
V A L V E
Fig. 7 A -5 7 A -ln s ta ll in g Manual Shaft Into Case
Fig. 7A -59A ~lnstalling Speedometer Drive Gear and Clip