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Brakes 243
Transmission Retarder
The Transmission Retarder is an option
with Allison HD and MD transmissions. It
is activated by an on/off switch in the aux-
iliary panel and is controlled by a stalk
switch mounted in front of the wiper
switch. You can set 6 different levels with
the stalk switch.
Do not use the retarder on wet or slip-
pery roads. The retarder may cause
vehicle to slide and cause an accident
which could result in injury or death.
NOTE! The retarder is automatically
disabled when the ABS (antilock brake sys-
tem) is active.
NOTE! Vehicle brake lights are always on
when transmission retarder is applied.
CAUTION
Apply the retarder only when engine is
at closed throttle.
CAUTION
Observe transmission and engine tem-
peratures. Select the lowest possible
transmission range in order to maximize
the cooling system capacity and retarda-
tion. If overheating occurs, decrease the
use of the retarder and use service
brakes instead. Check the retarder
overtemp light.
For complete warnings and instructions, re-
fer to your Allison Transmission manual.
W3004428
W3004405