Auto | Under the Hood | Transmissions & Drivetrain

Upkeep of your transmission may save you money in the long run. Learn manual and automatic transmission basics, then move on to clutches, differentials and torque converters.

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Why does my manual transmission car make a loud whirring noise in reverse?

Manual transmissions use mostly helical gears, but reverse is a special situation that requires a different type of gear -- a spur gear. Learn why a spur gear makes a loud whirring noise when the car's in reverse.


Are manual transmissions really faster than automatics?

Are manual transmissions really faster than automatics?

Manual transmissions used to accelerate faster than automatics, but is that still the case? Find out if manual transmissions are faster than automatics. See more »

What are manual transmission synchronizers?

What are manual transmission synchronizers? Visit HowStuffWorks.com to learn more about manual transmission synchronizers. See more »

How to Identify a Transmission Fluid Leak

How to identify a transmission fluid leak. Visit HowStuffWorks.com to learn how to identify a transmission fluid leak. See more »

Transmission Quiz

Transmission Quiz

Test your knowledge of both automatic and manual transmissions in this quiz. See how well you can shift mental gears and take the transmission quiz. See more »

CVT Quiz

CVT Quiz

The CVT quiz will test your knowledge of CVTs and how they work. See how well you can shift mental gears and take the CVT quiz. See more »

The Differential Quiz

The Differential Quiz

The differential quiz will test your knowledge of differentials and how they work. Find out how well your wheels are spinning with the differential quiz. See more »

The Clutch Quiz

The Clutch Quiz

The clutch quiz will test your knowledge of clutches and how they work. See how well you can shift mental gears and take the clutch quiz. See more »

Transmission Pictures

Transmission Pictures

Transmission pictures have images of manual, automatic, sequential, and dual-clutch transmissions. Check out the transmission image gallery. See more »

How Clutches Work

How Clutches Work

Clutches are found in manual and automatic transmissions. Learn about clutches, clutch plates, fly wheels, problems with clutches and types of clutches. See more »

How Dual-clutch Transmissions Work

How Dual-clutch Transmissions Work

Dual-clutch transmissions offer the best of manual and automatic transmissions and are becoming increasingly popular. Learn about dual-clutch transmissions. See more »