Which of these does not provide extra gears on some trucks?

• A. Automatic transmissions
• B. Manual transmissions
• C. Dual-clutch transmissions
• D. Continuously variable transmissions

Answer: (A)

Understanding how transmission types deliver gear ratios helps you see why one type doesn’t add extra discrete gears. Manual transmissions, and fixed-gear automatics or dual-clutch setups, provide a defined set of gear steps you shift through or that the system selects. Continuously variable transmissions work differently: they use a belt-and-pulley system to create a seamless range of gear ratios with no distinct steps to select. Because there aren’t separate gears to move through, they don’t offer the additional gears in the same way the other types do. That’s why a CVT is the type that doesn’t provide extra gears on some trucks. The other transmission types provide multiple fixed gears that change as you drive.