30
KEEPING FLUID CLEAN
It is absolutely necessary that the fluid put into the transmission be clean. Fluid must
be handled in clean containers, fillers, etc., to prevent foreign material from entering
the transmission. Lay dipstick in a clean place while filling the transmission.
RECOMMENDED AUTOMATIC TRANSMISSION FLUID AND
VISCOSITY GRADE — NON-MT 643R TRANSMISSIONS
Hydraulic fluids (oils) used in the transmission are important influences on
transmission performance, reliability, and durability.
• The following transmission fluid and viscosity grades are recommended.
— DEXRON
®
-III fluids for standard duty, on-highway applications
— Type C-4 fluids (Allison approved SAE 10W or SAE 30) for severe duty
and off-highway applications
— Type C-4 SAE 30 for all applications where the ambient temperature is
consistently above 95°F (35°C)
— Type C-4 SAE 30 for dropboxes
• Some DEXRON
®
-III fluids are also qualified as Type C-4 fluids. To ensure the
fluid is qualified for use in Allison transmissions, check for a DEXRON
®
-III or
C-4 fluid license, or approval numbers on the container, or consult the lubricant
manufacturer. Consult your Allison Transmission dealer or distributor before
using other fluid types; fluid types such as Type F, and universal farm fluids
may or may not be properly qualified for use in your Allison transmission.
• When choosing the optimum viscosity grade of fluid to use, duty cycle,
preheat capabilities, and/or geographical location must be taken into
consideration. Table 2 lists the minimum fluid temperatures at which the
CAUTION: Do not use containers or fillers for transmission fluid
that have been used to handle any antifreeze or engine coolant solu-
tion. Antifreeze and coolant solutions contain ethylene glycol
which, if introduced into the transmission, can cause the clutch
plates to fail.
CAUTION: Disregarding minimum fluid temperature limits can re-
sult in transmission malfunction or reduced transmission life.
To Next Page
Loading...
Need help?
General
