Allison Transmission 1000 & 2000 Product Families 4th Controls MT4007EN Troubleshooting Manual

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and the transmission has been operated under load for at least one hour. 2. Park vehicle as follows: a. For vehicles containing 1000 and 2000 Product Family transmissions with park pawl: (1) Bring the vehicle to a complete stop on a level surface using the service brake. (2) Make sure that the engine is at low idle rpm. (3) Put the transmission in P (Park). (4) If a parking brake is present, apply the parking brake. Make sure that the parking brake is properly engaged (5) Engage the P (Park) range by slowly releasing the service brake. (6) Apply the emergency brake, if present, and make sure it is properly engaged. (7) Chock the wheels and take any other steps necessary to keep the vehicle from moving. b. For vehicles containing 2000 Product Family transmissions with auto­apply parking brakes: (1) Bring the vehicle to a complete stop on a level surface using the service brake. (2) Make sure that the engine is at low idle rpm. (3) Put the transmission in PB (Auto­Apply Parking Brake). Make sure that the parking brake is properly engaged. (4) Apply the emergency brake, if present, and make sure it is properly engaged. (5) Chock the wheels and take any other steps necessary to keep the vehicle from moving. c. For vehicles containing 2000 Product Family transmissions without auto­apply parking brakes: (1) Bring the vehicle to a complete stop on a level surface using the service brake. (2) Make sure that the engine is at low idle rpm. (3) Put the transmission in N (Neutral). (4) Apply the emergency brake and/or parking brake and make sure they are properly engaged.

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