Parts Glossary

Automatically selects appropriate gears based on speed and load, using hydraulic or electronic control systems.

Shafts that connect differential to wheels, transmitting rotational power to drive the vehicle.

Friction disc that connects engine to transmission in manual cars, allowing smooth engagement and disengagement of power.

Actuates the clutch release bearing when the clutch pedal is pressed, disengaging the clutch.

Rubber covers that protect CV joints from dirt and retain lubricating grease.

Constant velocity joints that allow driveshafts to flex and articulate while maintaining smooth power transfer.

Allows wheels on the same axle to rotate at different speeds while cornering, dividing engine torque between them.

Secures differential to chassis while isolating vibration and managing drivetrain loads.

Transfers rotational power from transmission to differential in rear or all-wheel drive vehicles.

Uses two separate clutches for odd and even gears, enabling extremely fast gear changes without interrupting power delivery.

Provides rotational inertia to smooth engine operation and serves as the mounting surface for the clutch or torque converter.

Mechanical or electronic connection between gear lever and transmission, translating driver input into gear changes.

Drive axles in front-wheel or independent rear suspension vehicles, incorporating CV joints for articulation.

Allows driver to manually select gears to match engine speed with road speed, providing direct control over power delivery.

Clamps the clutch disc against the flywheel, transmitting engine torque to the transmission.

Pushes against pressure plate fingers to release clutch pressure when pedal is pressed.

Electronically controlled valves in automatic transmissions that direct hydraulic fluid to actuate gear changes.

Match gear speeds in manual transmissions, enabling smooth gear engagement without grinding.

Fluid coupling in automatic transmissions that transfers engine power to transmission while allowing slippage at low speeds.

Isolates transmission vibration from chassis while securely positioning the transmission.