Transmission appearance may differ, procedure is the same.
General Information
11
Lubrication
Operating Temperatures with Oil Coolers
An external oil cooler is required on the automatic
transmission in order to maintain proper operating
temperatures*. Transmission oil temperature is sensed
from the torque converter outlet port before the oil
enters the cooler.
Normal operating temperature, when sensed from the
torque converter outlet port, should be below 250
°
F;
however, intermittent operating temperatures to 300
°
F
do not harm the transmission.
On vehicles equipped with two transmission oil
temperature gauges, one gauge (required) senses
torque converter oil as mentioned above, while the
other gauge (optional) reads oil temperature from the
transmission sump. The sump temperature represents
oil that has circulated through the cooler. This
temperature is normally below 225
°
F; however,
intermittent sump temperatures to 250
°
F do not harm
the transmission.
When the average temperature of the transmission oil
exceeds the temperature limits as stated above, more
frequent oil changes may be needed.
The following conditions in any combination can cause
the recommended transmission oil temperatures to be
exceeded: (1) operating the transmission in a "stall"
condition; i.e., extended operation while in gear with the
vehicle stopped or slowly moving, (2) high density of
starts and stops at slow operating speed, (3) minimal
cooler capacity and/or restricted air flow to the
transmission oil cooler, (4) exhaust system too close to
the transmission, (5) improper oil level/incorrect oil.
*Engineering approval is required for cooler sizing on
all new CEEMAT
TM
applications.
