Chevrolet 10 Series 1968, Service Manual

Page: 491 / 713

CLUTCHES AND TRANSMISSIONS 7-28
AUXILIARY 4-SPEED TRANSMISSION (SPICER 6 0 4 1 )
INDEX
Page
Maintenance and A d ju s tm e n ts ............................................. 7-28
Gearshift L e v e r Assem bly ............................................. 7-28
Shift Rod Adjustment ...................................................... 7-28
L u b r ic a tio n .......................................................................... 7-28
Service O p e ra tio n s ................................................................ 7-29
Page
Rem oval of T ra n s m is s io n ................................................ 7-29
Installation of T ra n sm ission ............................................. 7-29
Shift Cover and Forks ................................................ 7-29
D is a s s e m b ly ................................................................ 7-29
Assem bly ................................................................... 7-29
MAINTENANCE AND ADJUSTMENTS
The four-speed auxiliary transmission is used as op­
tional equipment for model M600 tandem axle trucks. The
transmission is manually shifted and has four speeds fo r­
ward: 1st, 2nd, direct, and overdrive. A six bolt power
take-off is provided on the right and left hand side of the
transmission and a disc-type parking brake is mounted at
the rear of the transmission.
G E A R S H IF T L E V E R A S S E M B L Y
Removal and Installation
1. Disconnect the two shift rods at the gearshift lever
by removing the cotter pin and clevis pin.
2. Remove four nuts and lockwashers to remove gear­
shift from cab, then remove two gaskets and stop
plate.
3. Install in reverse order.
Overhaul
1. Apply downward pressure to cap, then rotate slightly
to free it from pins in tower.
2. Remove knob and nut; then remove cap, spring cup,
and spring.
3. Assemble in reverse order.
SHIFT ROD ADJUSTMENT
With the shift control rods disconnected at the gear­
shift, place the gearshift lever in neutral and place the
two transmission shift rods in the neutral (center detent)
position. Adjust the length of the shift control rods by
loosening the jam nuts, then turning the clevises to
lengthen or shorten the rods as required so the holes
align with those in the gearshift lever shafts. Install
clevis pin and secure with cotter pin. Tighten jam nuts
against clevises.
LUBRICATION
The auxiliary transmission should be lubricated as
prescribed in Section 0 of this manual.
CHEVROLET TRUCK SERVICE MANUAL