Table of Contents
Advertisement
Section 6
Lubrication
Recommended Oil
API GL-1 85W
API GL-1 90W
API GL-1 140W
!
CAUTION
Do not use API GL-5 oils as transfer case
lubricants. These oils contain extreme pressure
additives which tend to form sludge at the
operating temperatures of normal transfer cases.
These additives may also be harmful to some
internal transfer case components.
NOTE:
•
The transfer case oil sump should have a
maximum continuous operating temperature of
225°F (107°C) and an absolute maximum
temperature of 250°C (121°C).
•
If the transfer case continuous sump temperature
is over 225°F (107°C) due to high input speeds
with high ambient temperatures and poor air
circulation, use a lighter viscosity oil from the
above recommended lubrication oils.
•
A lighter viscosity oil can also be needed if the
transfer case operates in extremely cold climates.
!
CAUTION
Rockwell transfer cases can operate above 190°F
(88°C) without damage. However, when the oil
temperature reaches 250°F (121°C), the vehicle
must be stopped immediately and checked for the
cause of overheating.
Page 30
Pro Gear and Transmission • 906 W. Gore St. Orlando, FL 32805 • 1 (877) 776-4600 / (407) 872-1901 • parts@eprogear.com
Oil Substitutes
!
CAUTION
•
Rockwell does not approve the use of multi-
viscosity motor oils. Multi-viscosity API GL-1 oils
within the recommended viscosity range are
acceptable but not suggested if another option is
available.
•
Petroleum base and synthetic oils are both
acceptable for Rockwell transfer cases only if the
following rule is followed:
ONCE ONE OF THESE TWO TYPES OF OIL
HAS BEEN SELECTED FOR USAGE, IT MUST
NOT BE CONVERTED TO THE OTHER TYPE
OF OIL FOR THE LIFETIME OF THE TRANSFER
CASE. OIL SEAL DAMAGE CAN OCCUR.
Acceptable Motor Oil
Alternatives
40W motor oil: Same viscosity as a light API GL-1 90W
down to a medium viscosity API GL-1
85W.
50W motor oil: Same viscosity as a mid-range API GL-
1 synthetic oil.
!
CAUTION
Petroleum base oils and synthetic oils react
differently with sealing materials. Changing from
one oil type to the other can cause the transfer
case to leak. There can be a small possibility that a
synthetic oil can react to a transfer case's
components adversely. For complete assurance,
synthetic oils should be approved by the Rockwell
Engineering Department.
Advertisement
Table of Contents
