188 Multiplexing
Programmed Parameters
NOTE: The following tables show parameters that are not necessarily specific to your vehicle. These
are general parameters. To obtain the parameters that are closely related to your vehicle,
contact LabriePlus and ask for the electrical schematic pertaining to your truck model with all
the options installed.
Programming the TCM affects the engine speed, the
PTO engagement and operation as well as the
(optional) auto-neutral system. If the TCM is replaced, the new TCM must be reprogrammed to
reset the vehicle operating parameters. Refer to Table 5 to reprogram the new TCM.
On chassis supplied by Labrie, the programming package for Allison transmissions is package no 142.
Some customer chassis may have different programming packages. Refer to your local Allison dealer
for original programming packages. For further information regarding TCM programming, contact
LabriePlus.
The next page shows how Allison TCMs are programmed for Labrie vehicles.
NOTE: The parameters shown in the following tables are typical values and are given for guidance
only. Some vehicles may need different parameters based on the options installed. Please call
LabriePlus for the values that are specific to your vehicle.
NOTE: Engine speed (RPM) or road speed (MPH) limiters are options.
Table 5 Allison transmission programmed parameters
Parameters RPM
Maximum engine speed for PTO engagement 900
Maximum engine speed for
PTO operation 2000
Maximum output speed for
PTO engagement 5000
Maximum output speed for
PTO operation 930
a
(15 mph)
a. The value is adjusted so it corresponds with the vehicle speed in mph. It may vary according to the differential gear ratio and tire size.
Maximum output speed for auto-neutral (if present) 500 (7 mph)
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