Removing the Transmission from the Park (P) Position
Warning: Do not tow an unbraked vehicle if the combined weight of both vehicles is more than the sum of the gross axle weight ratings (GAWR) of the towing vehicle. Otherwise brake capacity will be inadequate, which could result in personal injury or death.
Important: When it is necessary to tow the vehicle, follow the instructions below closely to prevent damage to the vehicle.
When towing or pushing any vehicle equipped with an Allison transmission, disconnect the driveshaft at the rear axle and support it as necessary, regardless of the distance or speed traveled.
Note: Towing rules and regulations vary from federal, state, local, and transit authority. These laws must be followed when towing the vehicle.
If a vehicle with a shift-by-wire (SBW) system needs to be towed and the system cannot be activated to take the transmission out of Park (P), follow the steps in the procedure below.
- Set the parking brake on the tow vehicle.
- Chock the tires of the tow vehicle.
- Set the parking brake on the disabled vehicle.
- Chock the tires of the disabled vehicle.
- Underneath the disabled vehicle, at the transmission, remove
the access hole plug at the rear of the SBW actuator. See Fig..
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SBW Actuator
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Access Hole Plug
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Shift Selector Shaft (part of Allison transmission)
Fig. 1, SBW Actuator (at transmission)
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- Insert a 3/16-inch allen wrench or hex key through the access hole into the rear of the actuator. Turn the allen wrench in a clockwise direction until the transmission comes out of the Park (P) position.
- Replace the access hole plug.
- Remove the chocks from the tires of both vehicles.
Note: The transmission may also be placed in the Park (P) position using this procedure.