SPICER TRANSMISSION LUBRICATION
The R8000 auxiliary transmission is designed to utilize splash lubrication for all internal bearings, bushings, shafts and
To insure proper lubrication and operating temperatures in these units it is most important that the proper lubricants be
used and that correct oil levels be maintained.
SAE 30, 40, or 50
HEAVY DUTY ENGINE OIL MEETING SPEC MIL-L-2104B OR
MIL-L-45199 SERIES 3
STRAIGHT MINERAL GEAR OIL
BELOW 0 F
Do NOT USE EXTREME PRESSURE ADDITIVES, such as found in multi-purpose or rear axle type lubricants.
These additives are not required in Spicer transmissions, and may, in some cases, create transmission problems. Multi-
purpose oils, as a group, have relatively poor oxidation stability, a high rate of sludge formation and a greater tendency to
react on, or corrode, the steel and bronze parts.
Capacity: 12 pints at 0° installation capacity will vary with, and is dependent on, angle of installation.
We recommend an initial oil change and flush after the transmission is placed in actual service. This change should be
made any time following 1000 miles, but never to exceed 4000 miles, of over-the-road service. In off-highway use, the
change should be made after 24 and before 100 hours of service have elapsed. There are many factors that influence the
following oil change periods and we have not specified a definite mileage interval.
In general, it is suggested that a drain and flush period be scheduled every 20,000 miles for normal over-the-highway
operations. Off-the-highway usually requires oil change every 30 days. The oil level in the transmission should be checked
every 2,000 miles on-highway, or every 24 hours in off-highway operation. The correct oil level in all Spicer transmissions is
established by the filler plug opening.
REFILL First, remove all dirt around the filler plug. Then refill with new oil of a grade recommended for the existing
season and prevailing service. Fill to the bottom of the level testing plug positioned on the side of the transmission.
Do not overfill the transmission. Overfilling usually results in oil breakdown due to excessive heat and aeration from the
churning action of the gears. Early breakdown of the oil will result in heavy varnish and sludge deposits that plug up oil
ports and build up on splines and bearings. Overflow of oil usually escapes onto parking brakes causing additional trouble.
Do not tow vehicles equipped with Spicer transmissions at high speeds or for long distances without first
pulling the axles or disconnecting the drive shaft. Lubrication of the internal gear train is inadequate when
the vehicle is towed.