310S Drivetrain and Transmission

Question 1

What is the primary function of the torque converter in an automatic transmission?

Accepted Answer

To transfer and multiply engine torque to the transmission using hydraulic fluid coupling

Answer

The torque converter uses hydraulic fluid to transfer engine torque to the transmission input shaft. At low speeds, it multiplies torque through the stator element, providing a mechanical advantage similar to a low gear.

Question 2

What causes a vibration felt throughout the vehicle during acceleration from a stop?

Accepted Answer

Worn universal joints (U-joints) on the driveshaft

Answer

Worn U-joints develop play that causes the driveshaft to vibrate during acceleration. The vibration is typically felt at low speeds and during acceleration when the most torque is transmitted through the drivetrain.

Question 3

What is the purpose of the clutch release (throw-out) bearing in a manual transmission?

Accepted Answer

To contact and push against the rotating pressure plate fingers when the clutch pedal is depressed, disengaging the clutch

Answer

The throw-out bearing slides forward when the clutch pedal is pressed, contacting the rotating pressure plate diaphragm spring fingers. Being a bearing, it allows the stationary fork to push against the spinning pressure plate.

Question 4

What does burnt-smelling automatic transmission fluid (ATF) indicate?

Accepted Answer

The transmission has overheated, degrading the fluid and potentially damaging friction components

Answer

Burnt ATF has a dark brown or black colour with a burnt smell, indicating excessive heat has broken down the fluid's lubricating and friction-modifying properties. Overheating damages clutch packs, seals, and other components.

Question 5

What is the function of the differential in the drivetrain?

Accepted Answer

To allow the drive wheels to rotate at different speeds during turns while distributing power to both wheels

Answer

During a turn, the outer wheel must travel farther and rotate faster than the inner wheel. The differential's spider gears allow this speed difference while continuing to deliver torque to both wheels.

Red Seal Auto Tech 310S Practice Test

Red Seal Auto Tech 310S Practice Test

310S Drivetrain and Transmission