Chevrolet 30 Series 1967 Service Manual page 16

LUBRICATION 0-14
At every oil change the system should be tested for
proper function and serviced, if necessary.
*Under prolonged dusty driving conditions, it is recom­
mended that these operations be performed more often.
Crankcase Breather
At each oil change, crankcase breather should be re ­
moved and cleaned in suitable solvent. Do not oil ele­
ment.
TRANSMISSIONS
Powerglide Transmission
NOTE:
Every 12,000 miles, it is recommended
that the Powerglide low band be adjusted as
specified in Section 7 of this manual.
General Motors Automatic Transmission Fluid (Part
numbers 1050568, 69, 70) or equivalent should be used
in the Powerglide transmission. If this fluid is not avail­
able, refill with Automatic Transmission Fluid type "A"
bearing mark AQ-ATF followed by a number and suffix
letter "A".
Checking Fluid
Check oil level every 6,000 miles with engine idling,
parking brake set, transmission warm and control lever
in "N" position. Add fluid when level reached "Add"
mark on oil level rod located on right side of engine.
Do not overfill or allow dirt to enter filler tube.
Every 12,000 miles or oftener depending on severity
of service - remove fluid from the transmission sump
and add two quarts of fresh fluid. Operate transmission
through all ranges and check fluid level as described
above.
Turbo Hydra-Matic
Lubrication of the Turbo Hydra-Matic will, except for
fluid capacity and filter change listed below, follow the
Powerglide transmission recommendations. After check­
ing transmission fluid level it is important that the dip­
stick be pushed all the way into the filler tube.
Every 12,000 miles - after removing fluid from the
transmission sump, approximately 7-1/2 pints of fresh
fluid will be required to return level to proper mark on
the dipstick.
Every 24,000 miles the transmission sump strainer
should be replaced.
Allison Automatic Transmission
Every 6,000 miles the fluid level should be checked
and fluid added as described below when necessary. Use
"Automatic Transmission Fluid - Type A" bearing an
AQ-ATF number, or "Hydraulic Transmission Fluid
Type C". A good grade of 10W engine oil may be used
temporarily in emergencies, but must be replaced with
Automatic Transmission Fluid as soon as possible.
Checking Fluid
1. Start engine, set parking brake and move control
lever into (3"-HI") position. Run engine at 1000
rpm until engine and transmission have reached
normal operating temperature.
2. Remove any dirt or gravel from area around indica­
tor in right side of engine compartment. With engine
running at rpm remove indicator from case,
1 0 0 0
wipe clean, reinsert and carefully withdraw again.
CAUTION: 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 1000 rpm add sufficient
"Automatic Transmission Fluid - Type A" or "Type
C" - to bring level to full mark on indicator.
CAUTION: Fluid level should never go higher
than " F " mark on indicator when fluid is at
operating temperature. An
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 and turn the cap 1/4 turn to lock.
Draining and Refilling
Drain the transmission and replace the filter after the
first 6,000 miles of operation. At the 12,000 mile inter­
val of highway driving and
unimproved roads, (or mos. whichever occurs first) the
6
transmission should be drained and refilled and the
filter should be replaced. Approximately 9 qts. of fluid
are required to refill the transmission after the pan has
been drained. Drain immediately after operation - while
fluid is still warm. Do not flush transmission after
draining.
Synchromesh (incl. aux. 4-speed)
The lubricant level in the housing should be checked
every miles or oftener under severe operating
6 , 0 0 0
conditions. With unit at operating temperatures, lubri­
cant should be level with bottom of filler plug hole.
Either SAE 80 or SAE 80-90 multi-purpose gear lubricant
meeting requirements of U.S. Ordnance Spec. M IL-L-
2105B may be used.
Transmission Controls
The steering column manual shift mechanism on 1/2
Ton and 3/4 Ton models equipped with 3 speed transm is­
sion is factory lubricated and should not require periodic
lubrication. However, should the shifting effort become
noticeably greater, lubricate all linkage points with en­
gine oil. On G10 models, lubricate transmission shift
housing fitting every
6 , 0 0 0
in Note 1.
The brake retarder linkage and throttle valve linkage
for Allison Automatic transmissions should be lubricated
periodically. Contact points between rods, idlers, bell
cranks and supports should be lubricated with SAE 10
engine oil.
Recommended Lubricants
NOTE
1: Lubricate with water resistant EP
lubricant.
excessively full
miles of driving over
6 , 0 0 0
miles with lubricant specified
CHEVROLET TRUCK SERVICE M ANUAL