Direct drive in a standard transmission is accomplished by locking the input shaft to the output shaft.

In a standard transmission, direct drive is achieved by mechanically linking the input shaft and the output shaft. Here's a step-by-step explanation:

1. The input shaft is connected to the engine and brings the power (torque) into the transmission.

2. The output shaft is connected to the drive wheels of the vehicle and transfers the power from the transmission to the wheels.

3. In direct drive, a specific gear ratio is selected where the input shaft and output shaft are locked together. This means they rotate at the same speed.

4. This is usually the highest gear (for example, 4th gear in a 4-speed transmission, or 5th gear in a 5-speed transmission), where the gear ratio is 1:1.

5. In this state, the engine's power is transferred to the wheels with the least amount of reduction, providing the most efficient use of power and fuel.

6. This is typically used at higher speeds where less torque is needed to maintain the vehicle's speed.