Pontiac tempest 1968 Service Manual page 534

T W O SPEED A U T O M A T I C TRANSMISSION
7F-33
Fig. 7 F - 1 0 4 Installing Speedometer Drive G e a r Retaining C l i p
LOW BAND ADJUSTMENT
1. Tighten low band adjusting screw to 40 l b . i n .
torque.
2. Back off adjusting screw four turns.
3. Hold adjusting screw and tighten lock nut.
4
0
Install adjusting screw cap.
INSTALLATION OF SPEEDOMETER DRIVE GEAR
1. Place retainer into hole in output shaft (Fig.
7F-104).
2. Align slot in speedometer drive gear with r e ­
tainer clip and slide gear into place (Fig. 7F-105).
INSTALLATION OF REAR BEARING RETAINER,
GOVERNOR, VACUUM MODULATOR, SPEEDOMETER
DRIVEN GEAR AND VALVE BODY
See SERVICE OPERATIONS - TRANSMISSION
IN CAR (page 7F-3).
INSTALLATION OF CONVERTER
1. Install converter Into transmission, engaging
drive lugs of o i l pump drive gear.
2
0
Install converter holding clamp J 21366.
TROUBLE DIAGNOSIS
SEQUENCE FOR DIAGNOSIS
1. Check and correct o i l level.
2. Check and correct detent switch.
3. Check and correct vacuum line and fittings.
4. Check and correct manual linkage.
5. Road test car:
a. Install o i l pressure gauge.
b. Road test using a l l selective ranges, noting
when discrepancies in operation or o i l pressure
occur.
c„ Attempt to isolate the unit or circuit involved
in the malfunction.
d. If engine performance indicates an engine
tune-up is required, this should be performed
before road testing is completed or transmission
correction attempted. Poor engine performance
can result in rough shifting or other malfunctions.
OIL CHECK
Before diagnosis of any transmission complaint is
attempted, the o i l level should be checked. At the
same time, i t should be observed on dipstick whether
oil is solid in texture or aerated. Aerated o i l gives
an indication of an o i l leak i n suction line, which can
cause erratic operation and slippage. Water in o i l
imparts a milky, pinkish cast to the o i l and can cause
spewing.
A. DETERMINING SOURCE O F LEAK
Before attempting to correct an o i l leak, the actual
source of leak must be determined. In many cases,
the source of leak can be deceiving due to "wind
flow" around the engine and transmission.
F i g . 7 F - 1 0 5 Installing Speedometer Drive G e a r
The suspected area should be wiped clean of all
oil before inspecting for source of leak. Red dye is