
CLUTCH AND TRANSMISSIONS 7-37
LI.
- LI Range can be selected at any vehicle speed,
and the transmission will shift to second gear
and remain in second until vehicle speed is re-
duced to approximately 40 MPH, .depending on
axle ratio. LI Range position prevents the trans-
mission from shifting out of first gear.
It is very important that any communication concerning
the Turbo Hydra-Matic always contain the transmission
serial number and that all transmission parts returned
to Chevrolet Motor Division always be tagged with the
transmission serial number.
MAINTENANCE AND ADJUSTMENTS
TRANSMISSION FLUID
Transmission fluid level should be checked with trans-
mission warm and selector lever in "P" Park position,
every time engine oil level is checked or as specified in
Section 0 when engine oil is changed.
CAUTION: Since the Turbo Hydra-Matic trans-
mission is very sensitive to oil level, special
precautions should be taken when checking the
oil level, to insure against an overfifE
Transmission fluid should be changed as specified in
Section 0.
FLUID LEVEL INDICATOR
The fluid level indicator is located in the filler pipe at
the right rear corner of the engine. To bring the fluid
level from the add mark to the full mark add 1 pint.
Fluid level should be to the full mark with transmission
at normal operating temperature. With cold fluid the
level should be at the add mark or slightly below.
SHIFT CONTROL LINKAGE ADJUSTMENT
Adjust linkage as shown below and in Figure 2.
1.
The shift tube and lever assembly must be free in the
mast jacket See Section 9 for alignment of steering
column assembly if necessary.
2.
To check for proper shift linkage adjustment, lift the
transmission selector lever towards the steering
wheel. Allow the selector lever to be positioned in
drive (D) by the transmission detent.
NOTE: Do not use the indicator pointer as a
reference to position the selector lever. When
performing linkage adjustment, pointer is ad-
justed last.
3.
Release the selector lever. The lever should be in-
hibited from engaging low range unless the lever is
lifted.
4.
Lift the selector lever towards the steering wheel,
and allow the lever to be positioned in neutral (N) by
the transmission detent.
5.
Release the selector lever. The lever should now be
inhibited from engaging reverse range unless the
lever is lifted.
6. A properly adjusted linkage will prevent the selector
lever from moving beyond both the neutral detent,
and the drive detent unless the lever is lifted to pass
over the mechanical stop in the steering column.
See schematic diagram.
7.
In the event that an adjustment is required, place the
selector lever in drive (D) position as determined by
the transmission detent. See Steps 2 and 3.
8. Loosen the adjustment swivel at the cross-shaft, and
rotate the transmission lever so that it contacts the
drive stop in the steering column.
9. Tighten the swivel and recheck the adjustment. See
Steps 2 and 6. -
l(h Readjust indicator needle if necessary to agree with
the transmission detent" positions. See Section 9.
11.
Readjust neutral safety switch if necessary to pro-
vide the correct relationship to the transmission de-
tent positions. See Section 12.
12.
When properly adjusted the following conditions must
be met by manual operation of the steering column
shift lever:
a. From reverse to drive position travel, the trans-
mission detent feel must be noted and related to
indicated position on dial.
b.
When in drive and reverse positions, pull lever
rearward (towards steering wheel) and then re-
lease. It must drop back into position with no
restrictions.
NEUTRAL SAFETY SWITCH ADJUSTMENT
The neutral safety switch must be adjusted so that the
car will start in the park or neutral position, but will not
start in the other positions. For replacement refer to
Section 12 of this Manual.
DRAINING AND REFILLING TRANSMISSION
Drain oil immediately after operation before it has had
an opportunity to cool.
To drain oil proceed as follows:
1.
Remove bottom pan attaching screws, pan, and gas-
ket.
2.
Remove oil strainer. Remove "O" ring seal from
pick-up pipe and discard.
3.
Discard strainer if dirty.
4.
Install new "O" ring seal on pick-up pipe and install
strainer and pipe assembly.
5.
Thoroughly clean bottom pan.
6.. Affix new gasket to bottom pan with petroleum jelly.
7.
Install bottom pan with attaching screws and torque
to specifications;
8. If only the pan has been removed, pour approximately
7-1/2 pints of fluid into the transmission. If the
valve body has also been removed use 9-1/2 pints.
After a complete overhaul approximately 19 pints
are required. Be sure container, spout, or funnel is
clean.
9. Start engine and let idle (carburetor off fast idle
step).
Place selector lever in P position and apply
hand brake.
10.
With transmission warm (approximately 150°F), add
fluid to bring level to full mark on indicator.
CAUTION: Do not overfill. Foaming will re-
sult.
CHEVROLET CHASSIS SERVICE MANUAL

CLUTCH AND TRANSMISSIONS 7-40
pipes.
If
care
is
taken
in
removing control valve
body
the six (6)
check balls will stay
in
place above
the spacer plate.
CAUTION:
Do not
drop manual valve.
5. Remove
the
governor pipes
and
manual valve from
control valve body.
Installation
Installation
of the
control valve body
is the
reverse
of
the removal.
GOVERNOR
Removal
.
1.
Remove governor cover attaching screws, cover,
and
gasket.
2.
Discard gasket.
3.
Withdraw governor assembly from case.
Installation
Installation
of the
governor assembly
is the
reverse
of
the removal.
Use a new
gasket under
the
governor
cover.
MODULATOR AND MODULATOR VALVE
Removal
1.
Remove modulator assembly attaching screw
and
retainer.
2.
Remove modulator assembly from case. Discard
"O"
ring seal.
3.
Remove modulator valve from case.
Installation
Installation
of the
modulator assembly
and
modulator
valve
is the
reverse
of the
removal.
Use a new
"O" ring
seal
on the
modulator assembly.
PARKING LINKAGE
Removal
1.
Remove bottom
pan and oil
strainer.
2.
Unthread
jam nut
holding detent lever
to
manual
shaft.
3.
Remove manual shaft retaining
pin
from case.
4.
Remove manual shaft
and jam nut
from case.
NOTE:
DO NOT
remove manual shaft seal
un-
less replacement
is
required.
5. Remove parking actuator
rod and
detent lever
as-
sembly.
6. Remove parking pawl bracket attaching screws
and
bracket.
7. Remove parking pawl return spring.
NOTE:
The
following steps should
not be com-
pleted unless part replacement
is
required.
8. Remove parking pawl shaft retainer.
9.
Remove parking pawl shaft,
cup
plug, parking pawl
shaft, and parking pawl.
Installation
Installation
of the
parking linkage
is the
reverse
of the
removal.
Use new
seal
and cup
plug,
if
removed,
and
new bottom
pan
gasket.
REAR SEAL
Removal
1.
Remove propeller shaft.
2.
Pry
seal
out
with screw driver.
Installation
1.
Using Tool J-5154
or
J-21359 install
new
seal.
2.
Re-install propeller shaft.
OTHER SERVICE WITH TRANSMISSION IN VEHICLE
The following operations when done
as
single opera-
tions
and not as
part
of a
general overhaul should,
as a
practical matter,
be
performed with
the
transmission
in
the.
vehicle. Refer
to the
"Transmission Disassembly
and Reassembly" section
of the
Overhaul Manual
for
service procedures.
a. Oil
filler pipe
and
"O"
ring seal.
b.
Oil pan
and
gasket.
c. Down shift solenoid
or
connector.
d. Valve body spacer plate, gasket
and
check balls.
e. Front accumulator piston.
f.
Rear servo
and
rear accumulator assembly.
g.
Rear band apply checking with Tool J-21370.
Ji.
Front servo assembly.
i. Speedo driven gear.
j.
Case extension
or
gasket.
k.
Strainer
and
"O"
ring.
TRANSMISSION REPLACEMENT
Before raising
the car,
disconnect
the
battery
and re-
lease
the
parking brake.
1.
Remove propeller shaft.
8.
2.
Disconnect speedometer cable, electrical lead to case
9.
connector, vacuum line
at
modulator,
and oil
cooler
10.
pipes.
3.
Disconnect shift control linkage.
4.
Support transmission with suitable transmission jack.
11.
5. Disconnect rear mount from frame crossmember.
6. Remove
two
bolts
at
each
end of
frame crossmember
12.
and remove crossmember.
7. Remove
oil
cooler lines, vacuum modulator line,
speedo cable,
and
detent solenoid connector wire
at
transmission.
Remove converter under
pan.
Remove converter
to
flywheel bolts.
Loosen exhaust pipe
to
manifold bolts approximately
1/4
inch,
and
lower transmission until jack
is
barely
supporting
it.
Remove transmission
to
engine mounting bolts
and
remove
oil
filler tube
at
transmission.
Raise transmission
to its
normal position, support
engine with jack
and
slide transmission rearward
from engine
and
lower
it
away from vehicle.
CHEVROLET CHASSIS SERVICE MANUAL

STEERING 9-2
Fig.
1—Cover
Attaching Bolts—Chevy li Shown
ADJUSTMENTS
STEERING
GEAR
Before any adjustments are made to the steering gear
in an attempt to correct such conditions as shimmy,
loose or hard steering etc., a careful check should be
made of front end alignment, shock absorbers, wheel
balance and tire pressure for possible cause.
Correct adjustment of the steering gear is very im-
portant. Perform adjustments following the sequence
listed below,
1.
Remove pitman arm nut and mark relation of pitman
arm position to sector shaft. Remove pitman arm
with Tool J- 6632 as shown in Figure 2.
2.
Loosen the pitman shaft lash adjuster screw locknut
and turn the adjuster screw a few turns in a counter-
clockwise direction (fig. 3). This removes the load
Fig. 2—Removing Pitman Arm
imposed on the worm bearings by the close meshing
of rack and sector teeth. Turn steering wheel gently
in one direction until stopped by gear, then back away
about one turn.
CAUTION: Do not turn steering wheel hard
against stops when steering relay rod is discon-
nected as damage to ball guides may result.
3.
All except Corvette and telescopic columns:
a. Disconnect steering column harness at chassis
wiring connector plug.
b.
Remove horn cap or ornament and using an inch
pound torque wrench and socket on steering wheel
nut, measure torque required to keep the wheel
in motion.
LASH ADJUSTER
SCREW
LOCK NUT
WORM BEARING
ADJUSTER
\
WORM
ADJUSTER
Fig.
3—Steering Gear Adjustment Points
CHEVROLET CHASSIS SERVICE MANUAL

STEERING 9-3
Fig.
4-Checking Wheel PuI!-Corvette
c. If torque does not lie within limits given in speci-
fications at rear of manual, adjustment is
necessary.
4.
Corvette and telescopic columns:
a. Use Tool J-5178 to measure.pull at rim of wheel
required to keep wheel in motion (fig. 4).
b.
If pull does not lie within limits given in specifi-
cations in rear of manual, adjustment of worm
bearings is necessary.
NOTE:
If vehicle is equipped with a tilt steer-
ing column, it will be necessary to disconnect
the steering coupling to obtain a torque reading
of the steering column. This torque should then
be subtracted from any reading taken on the
gear.
5. To adjust worm bearings, loosen worm bearing ad-
juster locknut and turn worm bearing adjuster shown
in Figure 3 until there is no perceptible end play in
worm. Check pull at steering wheel, readjusting: if
necessary to obtain proper pull. Tighten locknut and
recheck pull. If the gear feels "lumpy" after adjust-
ment of worm bearings, there is probably damage in
the bearings due to severe impact or to improper
adjustment and the gear must be disassembled for
replacement of damaged parts.
6. After proper adjustment of worm is obtained and all
mounting bolts securely tightened, adjust lash ad-
juster screw. First turn the steering wheel gently
from one stop all the way to the other, carefully
counting the total number of turns. Then turn wheel
back exactly half way, to center position. Turn lash
adjuster screw clockwise to take out all lash in gear
teeth, and tighten locknut. Check pull at steering
wheel taking highest reading as wheel is turned
through center position. See specifications in rear of
manual for proper sector lash adjustment. Readjust
if necessary to obtain proper pull.
NOT MORE THAN
T/a INCH FROM
CENTERLINE
Fig.
5—Steering Wheel Alignment
NOTE:
If maximum specification is exceeded,
turn las£ adjuster screw counterclockwise, then
come up on adjustment by turning the adjuster in
a clockwise motion.
7. Tighten locknut then recheck pull, as it must lie be-
tween specified readings.
Fig.
6—Adjusting Steering Ratio—Corvette
CHEVROLET CHASSIS SERVICE MANUAL

STEERING 9-4
8. Reassemble pitman arm to sector shaft, lining up
marks made during disassembly. Refer to torque
specifications at rear of manual for correct torque
value.
9. Install horn cap or ornament and connect steering
column harness at chassis connector.
NOTE:
Chevy.n models are equipped with a
shim at the frame to steering gear mounting
bolts.
Shims may be removed or installed as
required for proper steering gear alignment.
STEERING WHEEL ALIGNMENT AND
HIGH POINT CENTERING
1.
Set front wheels in straight ahead position. This can
be checked by driving vehicle a short distance on a
flat surface to determine steering wheel position at
which vehicle follows a straight path.
2.
With front wheels set straight ahead, check position
of mark on wormshaft designating steering gear high
point. This mark should be at the top side of the shaft
at 12 o'clock position and lined up with the mark in
the coupling lower clamp.
3.
If gear has been moved off high point when setting
wheels in straight ahead position, loosen adjusting
sleeve clamps on both left and right hand tie rods,
then turn both sleeves an equal number of turns in
the same direction to bring gear back on high point.
CAUTION: Turning the sleeves an unequal
number of turns or in differential directions will
disturb the toe-in setting of the wheels.
4.
Readjust toe-in as outlined in Section 3 (if necessary).
5. With wheels in a straight ahead position and the
steering gear on highpoint, check the steering wheel
alignment by measuring the distance from each hori-
zontal spoke to the horizontal centerline of the
steering wheel (fig. 5). If the horizontal spokes are
over 1-1/8 inches from the horizontal position the
wheel should be removed and centered. (See steering
wheel removal in this section.)
TOE-IN ADJUSTMENT
Adjust the steering linkage for proper toe-in setting as
outlined in Section 3.
CORVETTE STEERING RATIO (Fig. 6)
The Corvette steering ratio may be changed as follows:
CAUTION: Do not use the rearward hole in the
steering arm with power steering equipment or
interference may result.
1.
Remove tie rod ball stud nut at steering arm and
disconnect tie rod from steering arm.
2.
Move tie rod end to forward hole for 17.6:1 ratio
(fast ratio) or rear hole for 20.2:1 ratio (standard
ratio).
3.
Install tie rod stud nut and tighten securely. Repeat
operation on opposite steering arm.
COMPONENT REPLACEMENT AND REPAIRS
STEERING WHEEL
REGULAR PRODUCTION (Fig. 7)
Removal
1.
Disconnect steering column harness from chassis
wiring harness at connector (fig. 8).
2.
Pull out horn button cap or center ornament and
retainer.
3.
Remove three screws from the receiving cup.
4.
Remove the receiving cup, belleville spring, bushing,
and pivot ring.
5. Remove the steering wheel nut and washer.
6. Using Tool J-2927, install centering adapter on
steering shaft, thread puller anchor screws into
threaded holes provided in steering wheel. Turn
center bolt of tool clockwise to remove steering
wheel (fig. 9).
Installation
CAUTION: Direction signal control assembly
must be in "neutral position when assembling
steering wheel to prevent damage to cancelling
cam and control assembly.
1.
With directional cancelling cam and horn contact as-
sembly in place, set wheel onto steering shaft.
Fig. 7—-Regular Wheel and Horn Attachments
CHEVROLET CHASSIS SERVICE MANUAL

STEERING 9-5
Fig.
8—Steering Column Wiring Connector
Secure with washer and nut. Refer to torque speci-
fications at rear of manual for correct torque values.
Install belleville spring (with dish of spring up), pivot
ring, bushing and receiving cup with screws.
Install retainer and horn button cap or center
ornament.
Connect steering column harness to chassis wiring
connector.
Fig.
9—Removing Steering Wheel with J-2927
Fig.
10—Simulated Wood Steering Wheel and Attaching Parts
SIMULATED WOOD (Fig. 10)
Removal
1.
Disconnect steering column harness from chassis
wiring harness at connector.
2.
Remove horn cap assembly by pulling up.
3.
Remove contact assembly attaching screws and re-
move contact assembly.
NOTE:
If steering wheel only is to be replaced,
perform step 4. If directional signal cancelling
cam is to be replaced, omit step 4 and proceed
with steps 5 and 6.
4.
Remove remaining screws from steering wheel and
remove wheel from hub assembly.
5. Remove steering wheel nut and washer.
6. Using Tool J-2927, install centering adapter on
steering shaft, thread puller anchor screws into
threaded holes provided in hub assembly. Turn
center bolt of tool clockwise to remove hub
assembly.
Installation
CAUTION: Directional signal control assembly
must be in neutral position when assembling hub
assembly to prevent damage to cancelling cam
and control assembly.
1.
With directional cancelling cam and horn contact in
place, install hub assembly on steering shaft. Secure
with washer and nut. Refer to torque specifications
at rear of manual for correct torque value.
2.
Attach steering wheel to hub assembly using the six
attaching screws and tighten securely.
3.
Place horn contact on steering wheel and attach with
three screws. Tighten securely.
4.
Snap horn button in place.
5. Connect steering column harness to chassis wiring
connector.
CORVETTE TELESCOPING (Fig. 11)
Removal
1.
Disconnect steering column harness at wiring
connector.
2.
Pry off horn button cap.
3.
Remove three screws securing horn contact to spacer
and hub.
4.
Remove two screws securing lock screw to lock
knob,
and remove lock screw, lock knob, and spacer.
CHEVROLET CHASSIS SERVICE MANUAL

STEERING 9-6
Fig.
11
—Corvette Telescoping Wheel Option
5.
7.
NOTE:
If steering wheel only is to be replaced,
perform Step 5 below only. If directional signal
cancelling cam is to be replaced, omit Step 5
and proceed with Steps 6 and 7.
Remove six screws securing steering wheel to hub
and remove wheel.
Remove nut and washer from shaft and using steering
wheel puller Tool J-2927, remove steering wheel and
hub from vehicle.
Slide cancelling cam and spring off shaft.
Installation
NOTE:
Refer to torque specifications at rear of
manual for correct torque values.
1.
If necessary, slide cancelling cam and spring on end
of shaft.
2.
If hub was removed from steering wheel, attach hub
to steering wheel with screws removed during dis-
assembly.
3.
Place steering wheel and hub assembly in position
and secure to column with washer and nut.
4.
Position spacer on steering wheel.
5. Position lock knob on steering wheel.
6. Install lock screw through lock knob, turn into shaft,
and adjust to lock position.
7. Attach spacer to wheel with three screws.
8. Place lock knob in lock position and attach to lock
screw with two screws.
9. Remove three screws holding spacer. Attach horn
contact to spacer and steering wheel with three
screws.
10.
Install horn button cap.
11.
Connect steering column harness at chassis plug.
STEERING COUPLING (Fig. 12)
Removal
NOTE:
Chevy n models are equipped with a
clamp arrangement rather than the conventional
"rag joint" steering coupling. Refer to Steering
Gear - Chevy II, for service procedures.
1.
Remove nuts and washers securing steering coupling
to flanged end of steering column (fig. 12).
2.
Remove coupling clamp bolt (fig. 12) and slightly
spread coupling clamp.
CHEVROLET CHASSIS SERVICE MANUAL

STEERING 9-10
SECTOR SHAFT SEAL REPLACEMENT
A faulty seal may be replaced without removal of
steering gear from car by removing pitman arm as out-
lined under Maintenance and Adjustments--Steering Gear
Adjustments and proceed as follows:
1.
Loose lash adjuster lock nut and turn lash adjuster
screw several turns counterclockwise.
2.
Remove three cap screws holding side cover to gear
bushing.
3.
Pull side cover and sector shaft from gear housing
as a unit. Do not separate side cover from sector
shaft.
4.
Pull sector shaft seal from gear housing using
hooked tool or pliers.
5. Coat new seal with chassis grease and position in
sector shaft bore.
6. Place a socket or piece of pipe of suitable diameter
on top of seal and drive seal into bore by tapping
pipe or socket with soft hammer.
7. Install sector shaft side cover assembly, being care-
ful not to damage new seal with splines on end of
shaft; splines may be wrapped with a few turns of
tape to prevent this.
8. Install new side cover gasket and align side cover on
gear housing and install cap screw.
9. Perform steering gear adjustment and install pitman
arm as outlined under Maintenance and Adjustments.
STEERING COLUMN
All models are equipped with new energy absorbing
steering columns. The columns are of five basic designs
as follows:
1.
Syncromesh. The syncromesh column is used on
models with standard, column mounted, conventional
shift levers. The shift tube, within the outer mast
jacket, includes two lower shift levers for connection
to the transmission control linkage.
2.
Automatic and floor shift. This column is used on
models equipped with column mounted powerglide
shift levers, or models with floor shift. If the ve-
hicle has the column mounted powerglide shift con-
trol, the inner shift tube has a single lower shift
lever for connection to the transmission control
linkage. On floor shift models, no lower shift levers
are present on the shift tube.
3.
Tilt wheel option. The upper end and steering shaft
of this column is specially designed to accommodate
the optional tilt steering wheel.
4.
Standard Corvette Column. The standard Corvette
column is similar in design to the Automatic and
Floor Shift column used on other models, except
no shift tube is used. Other differences are pointed
out in the disassembly and assembly procedures for
Standard Corvette column.
5. Telescopic wheel option. The upper end and steering
shaft of this column is specially designed to ac-
commodate the optional telescoping steering wheel.
To perform service procedures on steering column
upper end components, it is not necessary to remove the
column from the vehicle. The steering wheel, horn com-
ponents, turn signal switch, upper housing with bearing,
shift control lever, hazard warning knob, and upper shift
bowl may all be removed with the column remaining in
the vehicle. When servicing the above components, omit
the removal procedure and proceed with the applicable
disassembly procedures. Because of the numerous dif-
ferences in steering column types, be sure to refer to the
set of instructions below which apply to the exact column
to be serviced:
CAUTION: The outer mast jacket, shift tube, _
steering shaft, and instrument panel column
mounting b
racket
are designed as energy ab-
sorbing units. Because of the design of these
components, it is absolutely necessary to handle
the column with care when performing any serv-
ice operation required. Avoid hammering, jar-
ring, dropping, or leaning on any portion of the
column.
Removal
1.
Disconnect steering column harness at connector.
Disconnect neutral safety switch and back-up lamp
switch connectors if so equipped.
Remove steering wheel as outlined in this section.
Remove nuts and washers securing flanged end of
column to steering gear. On Chevy H models, re-
move nut and clamp bolt securing lower end of steer-
ing column to steering gear.
Disconnect transmission control linkage, if so
equipped, from lower column shift tube, levers.
Chevrolet and Chevy II only: Remove screws at-
taching upper and lower mast jacket covers together.
On Chevrolet, remove screws attaching lower cover
to instrument panel (figs. 15 and 18). Remove lower
cover.
Chevelle only: Remove screws securing mast jacket
trim cover to instrument panel and remove cover
(fig. 15).
Corvette, only: Remove screws securing escutcheon
to instrument panel. Remove screws securing upper
and lower covers together and remove covers.
On Chevrolet and Chevelle columns with Powerglide
shift levers, loosen set screw at six o'clock position
at bottom of column and remove the transmission
shift indicator pointer (fig. 15).
9. Chevrolet only (fig. 19):
a. Remove screws securing cover trim to dash
panel and remove cover trim.
2.
3.
4.
5.
6.
7.
8.
Fig.
18—Mast Jacket Cover Attachments—Chevy II
CHEVROLET CHASSIS SERVICE MANUAL