In the Simpson planetary gear set, the high and reverse clutch that inputs to the sun gear has a ______ attached to it.

In the Simpson planetary gear set, the high and reverse clutch that inputs to the sun gear has a ______ attached to it.

• A. Clutch hub
• B. Friction plate
• C. Reaction plate
• D. Brake band

Answer: (D)

In this planetary setup, generating high and reverse requires keeping one gear element fixed while another is driven. When the high and reverse clutch engages to input power to the sun gear, the ring gear must be held stationary to create the proper torque path for that gear arrangement. The brake band is what provides that fixed reaction—it wraps around a drum and holds it still as the sun gear is driven by the clutch. The other components—friction plates or a clutch hub—are part of the clutch itself, not the fixed reaction member used to anchor the gearset for this path. So the brake band is attached to the high and reverse clutch to serve as the stationary element needed for this configuration.

In this planetary setup, generating high and reverse requires keeping one gear element fixed while another is driven. When the high and reverse clutch engages to input power to the sun gear, the ring gear must be held stationary to create the proper torque path for that gear arrangement. The brake band is what provides that fixed reaction—it wraps around a drum and holds it still as the sun gear is driven by the clutch. The other components—friction plates or a clutch hub—are part of the clutch itself, not the fixed reaction member used to anchor the gearset for this path. So the brake band is attached to the high and reverse clutch to serve as the stationary element needed for this configuration.