When the Transmission Is in Park, Line Pressure Sent to the Vacuum

question 46

Multiple Choice

When the transmission is in park, line pressure sent to the vacuum modulator is sent to the __________ when the throttle is closed and the vehicle is under no load.

• A) 1-2 shift valve
• B) 2-3 shift valve
• C) transmission pan
• D) throttle valve

Know the best practices for towing vehicles equipped with Allison hydromechanical transmissions.

Understand the operational modes of Allison hydromechanical transmissions including PTO mode.

Grasp the composition and operational principles of planetary gearsets in Allison transmissions.

Understand the function and components of a torque converter.