The torque converter is used as an integrated retardation feature in which transmission type?

The torque converter is used as an integrated retardation feature in which transmission type?

• A. Ecolife
• B. Ecomat
• C. Busmatic
• D. DIWA

Answer: (D)

The idea being tested is that some automatic transmissions include a built-in braking ability inside the box itself, not just in the wheel brakes. In the DIWA family, the torque converter is used as an integrated retardation feature, meaning it helps slow the vehicle during deceleration by creating drag in the fluid coupling. This braking effect is enhanced by the transmission’s internal retarder, which dissipates energy as heat in the transmission oil, reducing reliance on the service brakes and smoothing downshifts on hills. So, DIWA transmissions are designed to provide engine/torque converter–based retardation as part of their standard function, which is why this option is correct. Other transmission families are different designs and don’t emphasize this torque-converter retardation capability in the same integrated way.

The idea being tested is that some automatic transmissions include a built-in braking ability inside the box itself, not just in the wheel brakes. In the DIWA family, the torque converter is used as an integrated retardation feature, meaning it helps slow the vehicle during deceleration by creating drag in the fluid coupling. This braking effect is enhanced by the transmission’s internal retarder, which dissipates energy as heat in the transmission oil, reducing reliance on the service brakes and smoothing downshifts on hills. So, DIWA transmissions are designed to provide engine/torque converter–based retardation as part of their standard function, which is why this option is correct. Other transmission families are different designs and don’t emphasize this torque-converter retardation capability in the same integrated way.