Manual Transmission; Engine Cooling System - Chevrolet 1979 Light Duty Truck Owner's Manual

Add just enough DEXRON ® II fluid to fill the transmission. It takes
only one pint (0.5 litre) to raise the level from "Add" to "Full" with
a hot transmission.
Do not overfill the transmission. Overfilling can cause foaming and loss
of fluid, which could result in transmission damage. Automatic
transmissions are often overfilled because the fluid level is checked
when the fluid is cold. When cold, the dipstick shows that fluid should
be added. However, the cold low reading is normal; the fluid level will
rise about 3/4 inch (19 millimetres) as the fluid warms up from 60•F
to l SO"F ( 1 6"C to S2"C).
Automatic Transmission D ra i n I ntervals
Change the transmission fluid and change the filter (or clean the
screen) outlined in Section A of the Maintenance Schedule folder.
as

Manual Transmission

See Section A of the Maintenance Schedule folder to find out how often
the lubricant level should be checked.
Add lubricant, if needed, to fill to level of filler plug hole. Use SAE
SOW GL-5 or SAE SOW-90 GL-5 gear lubricant. For those vehicles
driven in Canada, use SAE SOW GL-5 gear lubricant.
Clutch Adjustment-Manual Transmissions
Clutch adjustment should be checked and adjusted periodically as
necessary to compensate for clutch facing wear. To check, depress
pedal by hand until resistance is felt. Free travel should be
approximately one to one and a half inches; if very little or no free
travel is evident, clutch adjustment is required.

ENGINE COOLING SYSTEM

The coolant recovery system is standard. The coolant in the radiator
expands with heat, and the overflow is collected in the recovery tank.
When the system cools down, the coolant is drawn back into the
radiator.
The cooling system has been filled at the factory with a quality coolant
that meets GM Specification 1 S99-M. Because the cooling system has
been designed to use coolant rather than plain water, the coolant
solution should be used year round. It has many advantages, such as:
•
provides freezing protection down to -20"F (-29•q, -34•F (-37.C)
in Canada,
•
provides boiling protection up to 262"F (12S.C),
•
protects against rust and corrosion in the cooling system,
•
maintains the proper engine temperature for efficient operation
and emission control, and
•
allows proper operation of the coolant hot light or gage.
See Section A of the Maintenance Schedule folder to find out when
the coolant must be replaced.
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