Which component controls the flow of pressurized hydraulic fluid to apply the clutches necessary to attain each range?

Which component controls the flow of pressurized hydraulic fluid to apply the clutches necessary to attain each range?

• A. Converters
• B. Solenoids
• C. Accumulators
• D. Regulators

Answer: (B)

In an automatic transmission, engaging the correct clutch packs for each gear range is done by the solenoids. These electro-hydraulic valves receive electrical signals from the transmission control and open or close specific passages in the valve body, routing pressurized hydraulic fluid to the appropriate clutch pistons. That controlled flow is what pulls in the right clutches to shift into the desired range. The other components play different roles: the torque converter transfers engine torque but doesn’t direct clutch engagement, accumulators store and soften hydraulic pressure for smoother operation, and regulators maintain overall system pressure but don’t decide which clutch is energized.

In an automatic transmission, engaging the correct clutch packs for each gear range is done by the solenoids. These electro-hydraulic valves receive electrical signals from the transmission control and open or close specific passages in the valve body, routing pressurized hydraulic fluid to the appropriate clutch pistons. That controlled flow is what pulls in the right clutches to shift into the desired range. The other components play different roles: the torque converter transfers engine torque but doesn’t direct clutch engagement, accumulators store and soften hydraulic pressure for smoother operation, and regulators maintain overall system pressure but don’t decide which clutch is energized.