Chevrolet 1980 Light Duty Truck Repair Manual page 301

Fi g . 7 A - 5 2 C ~ R e m o v i n g R e a r I n t e r n a l G e a r t o M a i n S h a f t
S n a p R i n g
14. R em ove rear internal gear to sun gear thrust
bearing and two (2) races.
15. If necessary, rem ove rear internal gear to m ainshaft
snap ring, to remove m ainshaft (Fig. 7A -52C ).
Fig. 7A-53C--Removing Nylon Speedometer Drive Gear
NYLON
SPEEDOMETER
DRIVE GEAR
A U T O M A T IC T R A N S M IS S IO N S
F ig . 7 A - 5 4 C - l n s t a l l i n g S p e e d o m e t e r D r i v e G e a r C l i p
Speedometer Drive Gear Replacement
If rem oval and installation or replacem ent o f the
speedom eter drive gear is necessary, proceed as follows:
Nylon S peed om eter D rive G ear
1. D epress clip and slide speedom eter drive gear o ff
output shaft (Fig. 7A -53C ).
2. To install, place clip (square end toward flange o f
shaft) into hole in output shaft (Fig. 7A -54C ). A lign slot in
speedom eter drive gear w ith clip and install gear.
The nylon speedom eter drive gear is installed at the
factory only. A L L service replacem ent speedom eter drive
gears are STEEL. W hen replacing the nylon speedom eter
drive gear w ith a steel gear, discard the retaining clip and
refer to Step "2" o f steel speedom eter drive gear installation.
M odels C A , C F and C G do not have a speedom eter drive
gear.
S teel S peed om eter D rive G ear
Install speedom eter drive gear rem over T ool
1.
21427-01 and J-9539 bolts w ith J-8105 or suitable puller on
(4 0 0 )7 A -15
SPEEDOMETER DRIVE
GEAR CLIP
J-