Chevrolet 1956 Truck Operator's Manual page 82

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8. With engine idling, then add sufficient fluid (approxi-
mately2
1
h quarts) to bring oil level to "L" (low) mark on
indicator. Continue to run engine until normal temperature is
attained; then recheck fluid level to "F" (full) mark on
indicator.
• Add one additional quart if equipped with transmission 011
cooler.
ClIECKING POWERMATIC FLUID-Check transmission
fluid level with transmission at normal operating temperature,
otherwise the engine and transmission must be warmed to
operating temperature. Engine must be running while check-
ing or adding fluid.
1. Start engine, set parking brake and move control lever
into (D) position. Run engine at idling speed until engine and
transmission have reached normal operating temperature.
2. Remove any dirt or gravel from area around indicator
and transmission case. With engine idling remove indicator
from case. Wipe clean, reinsert and carefully withdraw again.
Exercise extreme care to prevent dirt from entering filler
tube when checking fluid level.
Add fluid only when level reaches L mark
(1
qt. low) on the
indicator.
3. With engine operating at normal idle add sufficient
Automatic Transmission Fluid-Type A-to bring level to full
mark on indicator.
CAUTION: Fluid level should never be higher than "F" mark
on indicator when fluid is at operating temperature. An ex-
cessively full transmission will result in aeration of the fluid.
The expanding fluid may then be forced out of the filler tube.
Sufficient fluid may be lost
to
seriously damage the transmission.
4. Reinstall indicator.
DRAINING AND REFILLING THE POWERMATIC
TRANSMISSION-At the 15,000 mile interval the transmis-
sion should
be
drained and refilled. The oil filter should be
cleaned with mineral spirits or similar solvent and reinstalled.
Approximately 11 qts. of Type A Automatic Transmission
Fluid are required
to
refill the transmission after the oil pan
has been drained. Drain oil immediately after operation-while
fluid is still warm. Do not flush transmission after draining.
1. Loosen filter cover and allow to drain thoroughly. Do
• 81 •

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