Safety Precautions
The Allison on-highway transmissions are fully automatic and include the 1000 Series™, 2000 Series™, and 2400 Series™. Refer to the Allison website for additional information, harp://663cdcc67789205f539d2a31/pr/ORIGINAL/www.allisontransmission.com.
Warning: Do not leave the vehicle unattended with the engine running. If you leave the vehicle and the engine is running, the vehicle can move suddenly, which could result in personal injury or property damage.
1000 Series
On vehicles with Allison 1000 series transmissions, do the following steps if you have to leave the cab with the engine running (for example, when checking the transmission fluid):
Without Park Position
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Bring the vehicle to a complete stop using the service brake.
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Ensure that the engine is at low idle rpm.
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Put the transmission in neutral.
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Apply the parking brake, and make sure it is properly engaged.
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Chock the rear tires and take any other steps necessary to keep the vehicle from moving.
With Park Position
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Bring the vehicle to a complete stop using the service brake.
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Ensure that the engine is at low idle rpm.
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Put the transmission in P (park).
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Apply the parking brake (if equipped), and make sure it is properly engaged.
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Engage the park range by slowly releasing the service brake.
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Chock the rear tires and take any other steps necessary to keep the vehicle from moving.
2000 Series
On vehicles with Allison 2000 series transmissions, do the following steps if you have to leave the cab with the engine running (for example, when checking the transmission fluid):
Without Auto-Apply Parking Brake
Follow the instructions for vehicles with 1000 series transmissions, under the heading "Without Park Position."
With Auto-Apply Parking Brake
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Bring the vehicle to a complete stop using the service brake.
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Ensure that the engine is at low idle rpm.
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Put the transmission in PB (auto-apply parking brake).
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Apply the parking brake (if equipped), and make sure it is properly engaged.
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Chock the rear tires and take any other steps necessary to keep the vehicle from moving.
2400 Series
On vehicles with 2400 series transmissions, follow the instructions for vehicles with 1000 series transmissions.