1967 CHEVROLET CAMARO tow

CLUTCH AND TRANSMISSIONS 7-33

from rolling. The pointer on the indicator quadrant

should line up properly with the range indicators in all

ranges.

OIL LEAKS

Before attempting to correct an oil leak, the actual

source of the leak must be determined. In many cases

the source of the leak can be deceiving due to "wind flow1 f

around the engine and transmission.

The suspected area should be wiped clean of all oil

before inspecting for the source of the leak. Red dye is

used in the transmission oil at the assembly plant and

will indicate if the oil leak is from the transmission.

The use of a "black light"* to identify the oil at the

source of leak is also helpful. Comparing the oil from

the leak to that on the engine or transmission dip stick

(when viewed by black light) will determine the source

of the leak.

Oil leaks around the engine and transmission are gen-

erally carried toward the rear of the car by the air

stream. For example, a transmission "oil filter tube

to case leak" will sometimes appear as a leak at the

rear of the transmission. In determining the source of

an oil leak it is most helpful to keep the engine running.

The mating surfaces of servo cover, converter housing,

transmission case and transmission case extension

should be carefully examined for signs of leakage. The

vacuum modulator must also be checked to insure that

the diaphragm has not ruptured as this would allow trans-

mission oil to be drawn into the intake manifold. Us-

ually, the exhaust will be excessively smoky if the

diaphragm ruptures due to the transmission oil added to

the combustion. The transmission case extension rear

oil seal should also be checked. All test plugs should be

checked to make sure that they are tight and that there

is no sign of leakage at these points. The converter

underpan should also be removed. Any appreciable quan-

tity of oil in this area would indicate leakage at the pump

square seal ring, pump seal assembly, or pump bolt

sealing washers.

BASIC PRESSURE CHECKS

Four basic pressure checks are used for diagnosis and

operational checks for the Aluminum Powerglide trans-

mission. All checks should be made only after thoroughly

warming up the transmission.

• Wide Open Throttle Upshift Pressure.

• Idle Pressure in "Drive" Range.

• Manual "Low" Range Pressure.

• "Drive" Range Overrun (Coast) Pressure.

It is not recommended that stall tests be conducted

which would result in engine vacuum falling below 10" Hg.

Pressure gauge hose connections should be made at

the low servo apply (main line) test point (fig. 14PG).

Run the gauge line into the driving compartment by

pushing aside the mast jacket seal. The line out of the

way of the drivers feet and connect to pressure gauge

J-21867.

• Wide Open Throttle Upshift Pressure Check

Refer to the pressure check chart for upshift pressure
SERVO APPLY

PRESSURE

Fig.
14PG - Pressure Test Plug

points as indicated on the lower servo apply (main line)

gauge.

• Idle Pressure in "Drive" Range

In addition tp the oil pressure gauges, a vacuum gauge

is needed for this check.

With the parking brake applied and the shift selector

lever in "Drive", low servo apply (main line) pressure

should be as shown on the pressure check chart.

If pressures are not within these ranges, the following

items should be checked for oil circuit leakage:

1.
Pressure regulator valve stuck.

2.
Vacuum modulator valve stuck.

3.
Hydraulic modulator valve stuck.

4.
Leak at low servo piston ring (between ring and

bore).

5.
Leak at low servo piston rod (between rod and bore).

6. Leak at valve body to case gasket.

7.
Leak at valve body gaskets.

8. Front pump clearances.

9. Check passages in transmission case for porosity.

• Manual "Low" Range Pressure Check

Connect a tachometer, apply the parking brake, place

the selector lever in "Low" range, and adjust the engine

speed to 1000 rpm with the car stationary.

Low servo apply (main line) pressure should be as

shown on the pressure check chart.

Pressures not within this range can indicate the fol-

lowing possibilities:

1.
Partially plugged oil suction screen.

2.
Broken or damaged ring low servo.

CHEVROLET CHASSIS SERVICE MANUAL

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 7-41

CAUTION: Use converter holding ToolJ-5384

when lowering transmission or keep rear of

transmission lower than front so as not to lose
converter.

The installation of the transmission is the reverse of

the removal.

TURBO HYDRA-MATIC DIAGNOSIS PROCEDURE

Accurate diagnosis of transmission problems begins

with a thorough understanding of normal transmission

operation. In particular, knowing which units are in-

volved in the various speeds or shifts so that the specific

units or circuits involved in the problem can be isolated

and investigated further. Analytical diagnosis will pro-

tect the technician from come backs and certainly will

improve owner satisfaction.

An important and often overlooked aspect of diagnosis

is finding out specifically what the customer is com-

plaining of. For this purpose a short ride with the cus-

tomer will often prove beneficial. It may be found that

the condition the customer wants corrected is standard

and should not be altered.

The following sequence, based on field experience, pro-

vides the desired information quickly and in most cases

actually corrects the malfunction without requiring the

removal of the transmission. Details of the items listed

in this sequence are covered further in the text.

SEQUENCE FOR TURBO HYDRA-MATIC

DIAGNOSIS PROCEDURE

1.
Check oil level and condition.

2.
Check and correct detent switch.

3.
Check and correct vacuum line and fittings.

4.
Check and correct manual linkage.

OIL LEVEL AND CONDITION CHECK

Always check the oil level before road testing. Oil

must be visible on dip stick prior to operating the ve-

hicle. Erratic shifting, pump noise, or other malfunc-

tions can in some cases be traced to improper oil level.

Oil level should be checked with the selector lever in

the Park (P) position, engine running, and the vehicle on

level pavement.

Fluid level should be to the FULL mark with the trans-

mission at normal operating temperature (170°-190°
F.).

With warm fluid (room temperature), the level should be

at or slightly below the ADD mark.

If oil level was low, refer to Oil Leaks.

The condition of the oil is often an indication of whether

the transmission should be removed from the vehicle, or

to make further tests. When checking oil level, a burned

smell and discoloration indicate burned clutches or bands

and the transmission will have to be removed.

MANUAL LINKAGE

Manual linkage adjustment and the associated neutral

safety switch are important from a safety standpoint

The neutral safety switch should be adjusted so that the

engine will start in the Park and Neutral positions only.

With the selector lever in the Park position, the park-

ing pawl should freely engage and prevent the vehicle

from rolling. The pointer on the indicator quadrant

should line up properly with the range indicators in all

ranges.
OIL LEAKS

Before attempting to correct an oil leak, the actual

source of the leak must be determined. In many cases,

the source of the leak can be deceiving due to "wind flow"

around the engine and transmission.

The suspected area should be wiped clean of all oil be-

fore inspecting for the source of the leak. Red dye is

used in the transmission oil at the assembly plant and

will indicate if the oil leak is from the transmission.

. The use of a "black light"* to identify the oil at the

source of leak is also helpful. Comparing the oil from

the leak to that on the engine or transmission dip stick

(when viewed by black light) will determine the source

of the leak.

Oil leaks around the engine and transmission are gen-

erally carried toward the rear of the car by the air

stream. For example, a transmission "oil filler tube to

case leak" will sometimes appear as a leak at the rear of

the transmission. In determining the source of an oil

leak it is most helpful to keep the engine running.

POSSIBLE POINTS OF OIL LEAKS

• 1. TRANSMISSION OIL PAN LEAK

a. Attaching bolts not correctly torqued.

b.
Improperly installed or damaged pan gasket.

c. Oil pan gasket mounting face not flat.

2.
REAR EXTENSION LEAK

a. Attaching bolts not correctly torqued.

b.
Rear seal assembly — damaged or improperly

installed.

c. Gasket seal — (extension to case) damaged or

improperly installed.

d. Porous casting.

3.
CASE LEAK

a. Filler pipe "O" ring seal damaged or missing;

misposition of filler pipe bracket to engine —

"loading" one side of
"O"
ring.

b.
Modulator assembly "O" ring seal
—
damaged or

improperly installed.

c. Governor cover, gasket and bolts — damaged,

loose; case face leak.

d. Speedo gear
—
"O" ring damaged.

e. Manual shaft seal — damaged, improperly in-

stalled.

f. line pressure tap plug — stripped, shy sealer

compound.

g. Parking pawl shaft cup plug
—
damaged, improp-

erly installed.

h. Vent pipe (refer to Item 5).

i. Porous case.

4.
FRONT END LEAK

a. Front seal - damaged (check converter neck for

nicks,
etc., also for pump bushing moved for-

ward);
garter spring missing from pump to con-

verter seaL

b.
Pump attaching bolts and seals
—
damaged, miss-

ing, bolts loose.

CHEVROLET a
SERVICE

FUEL TANK AND EXHAUST SYSTEMS 8-2

COMPONENT PART REPLACEMENT

FUEL TANK

Draining Tank

The absence of a drain plug in the gas tanks makes it

necessary to siphon fuel from the tank when draining is

needed. The following procedure is recommended.

1.
Obtain approximately 10 feet of 3/8" I.D. hose and

cut a flat-type slit 18" from one end. Make this cut

on the hose in the direction "toward the shorter end

(See Figure 2).

2.
Insert a small pipe nipple (slightly larger O.D. than

the hose I.D.) into the opposite end of hose.

3.
Insert the nipple end of the siphon hose into the fuel

tank filler neck with the natural curl of the hose

pointing down. Insert until the hose is heard to strike

bottom of the tank.

4.
With the opposite end of the hose in a suitable con-

taner insert an air hose in downward direction in the

flap-type slit and trigger the flow of fuel.
FUEL FLOW

-If*
APPROX.-1 >SUT «<>«
AS SHOWN

10 FEET APPROX.-

Fig. 2—Siphon Construction

FWD
V-8

VIEW B

Fig. 3-Fuel Lines

CHEVROLET CHASSIS SERVICE MANUAL

FUEL TANK AND EXHAUST SYSTEMS 8-19

Fig.
22—Spare Tire Carrier Installed

6. Remove two fuel tank retaining strap bottom nuts

from forward support member located at forward

front side of tank.

7. Remove fuel tank metering unit wires (fig. 25).

8. Remove fuel pickup line and drain tank.

9. Remove gas cap, filler neck boot from the top of tank

and disconnect drain line (fig. 24).

NOTE:6
Coupe Models—Remove filler neck.

10.
Remove fuel tank support frame attachment bolts and

support.

11.
Lower tank and rotate toward the front of vehicle.

Installation (20 Gallon Tank)

NOTE:
Place hoses and wires to one side and

position anti-squeak pads to the crossmember,
END OF HOSE FLUSH

TO Va INCH BACK FROM

EDGE OF BUMPERETTE

Fig.
24-Gas Tank Filler Neck Vent Hose

cemented to the support and attached to the tank.

Replace with new pads as required.

1.
Hook retaining straps at the rear frame crossmem-

ber. (Crimp strap ends at rear frame attachment.)

NOTE:
Make certain strap ends are hooked and

anti-squeak pads are properly positioned.

2.
Slowly rotate fuel tank into position.

CAUTION: Coupe-Install filler neck after tank

is installed.

3.
Attach fuel tank support at the frame side rails.

TANK METERING UNI

WIRE CONNECTIONS

Fig.
23—Exhaust System Tail Pipe Attachment
Fig.
25—Fuel Tank Metering Unit, Wires and Lines

CHEVROLET CHASSIS SERVICE MANUAL

FUEL TANK AND EXHAUST SYSTEMS 8-25

4.
Cut the exhaust pipe near the muffler (see cau-

tion above) to allow sufficient pipe for muffler

replacement.

5.
^
Replace muffler and secure with new clamps.

NOTE:
Clamps must be assembled with nuts

attached toward the rear of the vehicle -

reference 90° to sawcuts in service muffler

pipe.

6. Reverse procedure for installation.

NOTE:
If bracket mounting insulators (tire

carcass mountings) are fatigued, replace to in-

sure a secure exhaust system.
7. In the event the tail pipe bezel has been damaged and

replacement is required, remove three screws and

replace the bezel. i

SIDE MOUNTED EXHAUST (Fig. 31)

Replacement

1.
Raise and support vehicle.

2.
Remove sill molding attaching screws and disengage

molding from the retainer.

3.
Remove cover retaining screws, cover and retainer

assembly.

4.
Remove exhaust pipe-to-manifold attaching nuts, and

rear bracket retaining nut, then detach exhaust pipe

from manifold studs and remove from vehicle.

Fig.
31—Side Mounted Exhaust System

CHEVROLET
CHASSIS SEKVK

STEERING 9-21

Fig.
43-Removing Shift Tube Using Shift Tube Remover J-22551

nut on tool. If the shift tube is not completely free

when tool is removed, complete removal by hand.

As shift tube is removed from automatic columns,

use care as lower shift lever is lowered through bot-

tom of mast jacket. Do not hammer or force shift

tube during removal from mast jacket.

23.
Remove lockplate (fig. 44) by sliding out of jacket

notches. Tip plate down toward bowl hub and slide

out from under top edge of jacket opening. Remove

wave washer.

24.
Remove bowl from mast jacket. Remove signal

switch and bearing housing if not previously

removed.

25.
On automatic column, remove shift lever spring from

bowl by winding spring up with pliers and pulling out.

26.
On automatic column, remove screws securing shift

stop plate to support, if necessary.

27.
Remove upper bearing from upper bearing housing, if

necessary.

Fig.
44—Lockplate Installed
28.
Remove lower bearing from lower bearing adapter,

if necessary.

29.
Service lock shoes, release springs, or shoe release

if necessary, as follows:

a. Drive the lock shoe retaining pin out of the hous-

ing using release lever pivot remover Tool

J-22635 (fig. 45, View A).

b.
Hold the shoe springs in compression by rocking

lock shoes in with a wedge to relieve the load on

the shoe release lever; drive out shoe release

lever pin using Tool J-22635 (fig. 45, View B).

Remove shoe release lever and release lever

spring.

c. Remove lock shoes and lock shoe springs.

30.
If necessary, remove seals from lower end of shift-

tube and discard seals.

31.
Unwrap mesh cover from jacket, if necessary.

Assembly-Tilt Column (Fig. 37)

1.
Apply a thin coating of lithium soap grease to all

friction surfaces.

2.
Assemble bearing housing components as follows:

NOTE:
With tilt lever opening on the left side,

shoes facing up, position the four slot shoe on

the left.

a. Place lock shoe springs and lock shoes in position

in bearing housing. Line up shoes for pin instal-

lation using Tool J-22635 (fig. 45). Install shoe

pin flush with housing face on shoe release lever

pin side.

b.
Hold the shoe springs in compression by rocking

lock shoes in. Insert pin through release lever

and install pin and lever.

3.
If lower bearing was removed, press lower bearing

into adapter.

4.
If upper bearing was removed, press upper bearing

into race on top of bearing housing.

5. On automatic columns, install stop plate on support

CHEVROLET CHASSIS SERVICE MANUAL

STEERING 9-22

Fig.
45—Removing Lock Shoe Retaining Pin Using Tool J-22635

with screws, if plate was removed during dis-

assembly.

On automatic columns, press a new shift lever spring

into bowl, if original spring was removed.

Insert the signal switch wire harness and connector

through the bearing housing and bowl. Retain the

housing and bowl together during remaining assem-

bly. (On columns where signal switch connector can

be inserted through bowl, it is not necessary to re-

Fig.
46—Installing Shift Tube Using Shift Tube

Installer Tool J-22549
tain bearing housing and bowl together.)

8. Slide bowl into top of mast jacket.

9. Place wave washer and lockplate into position. Work

lockplate into notches in jacket by tipping lockplate

toward bowl hub under the top edge of the jacket.

10.
If seals were removed from lower end of shift tube,

cement new seals into place.

11.
Carefully install shift tube in lower end of mast

jacket. On automatic columns, align key way in tube

with key in bowl. Complete installation of shift tube

using shift tube installer Tool J-22549 as shown in

Figure 46. Do not hammer or force tube when in-

stalling in jacket.

12.
Pull up on bowl to compress wave washer and install

thrust washer and shift tube retaining ring.

13.
Insert support into jacket by aligning "V" in support

with "V" notch in jacket. Insert mounting screws

through support into lockpiate and tighten screws.

14.
Align fingers of lower bearing adapter with holes in

jacket and pilot adapter over shift tube. Snap adapter

into place.

15.
Install back-up lamp/neutral start switch on column,

if so equipped, using the same mounting nuts re-

moved during disassembly. Install the switch loose-

ly, it is to be adjusted when column is installed in

the vehicle.

16.
Assemble the steering shaft as follows:

a. Clamp the lower portion of the steering shaft in a

vise with the socket facing upward.

b.
Apply front wheel bearing lube to the centering

spheres and the steering shaft sockets. Assemble

the spheres, with the wave washer in between, and

place the spheres in the upper shaft socket.

c. Turn the spheres so the lower shaft may be in-

stalled over the grooves.

NOTE: The locating marking on the end of the .

CHEVROLET CHASSIS SERVICE MANUAL