Peterbilt Model 320 Operator's Manual after 8-07 - Peterbilt Motors ...

Spicer Transmission Lubrication
Recommended Lubricants
Type Grade (SAE) Ambient
Temperature
Heavy Duty Engine
Oil MIL-L-2104B, C,
or D;
API - SF, or API-CD
50 Above 10° F (-12° C)
40 Above 10° F (-12° C)
30 Below 10° F (-12° C)
Mineral gear oil with
90 Above 10° F (-12° C)
rust and oxidation
inhibitor APIGL- 1 80W Below 10° F (-12° C)
Synthetic Lubricant* 50 All
* See your Peterbilt dealer for approved brands.
Allison Transmission Lubrication
Refer to your transmission manual (furnished separately)
for lubrication information.
PART 8: MAINTENANCE AND SERVICE
Spicer Transmission Lubrication
It is extremely important to use the proper lubricants and
maintain the correct oil levels in Spicer units. This will ensure
proper lubrication and operating temperatures in these
units.
Recommended Lubricants
The lubricants listed below are recommended, in order of
preference, for use in all Spicer mechanical transmissions,
auxiliaries, and transfer cases. Do not use extreme pressure
additives such as those found in multipurpose or rear
axle-type lubricants. These additives are not required in
Spicer transmissions, and may in some cases create transmission
problems. Multipurpose oils, as a group, have relatively
poor oxidation stability, a high rate of sludge formation,
and a greater tendency to react with or corrode the
steel and bronze parts.
– 140 – Y53-6015 R(08/07)