Which occurs because of spring pressure and the lack of governor and modulator pressure?

Which occurs because of spring pressure and the lack of governor and modulator pressure?

• A. Automatic shifting
• B. Automatic downshifting
• C. Scheduled lock-up
• D. Modulated lock-up

Answer: (B)

When automatic shift control relies on signals, it uses governor pressure (from speed) and modulator pressure (from engine load) to decide when to upshift or downshift. The springs in the valve body set a default position if those signals aren’t present. If governor pressure and modulator pressure are absent, the spring’s bias pushes the system toward the lowest gear, causing an automatic downshift. This default downshift keeps the drivetrain moving and prevents stalling when sensing inputs are missing.

When automatic shift control relies on signals, it uses governor pressure (from speed) and modulator pressure (from engine load) to decide when to upshift or downshift. The springs in the valve body set a default position if those signals aren’t present. If governor pressure and modulator pressure are absent, the spring’s bias pushes the system toward the lowest gear, causing an automatic downshift. This default downshift keeps the drivetrain moving and prevents stalling when sensing inputs are missing.