Your car's transmission is one of the most important parts of the vehicle, and it's also a complicated piece of machinery. Transmission repair can be difficult, so you want to prevent problems with this system as much as possible. Here's what you need to know about how it operates and how to keep it working smoothly.

A Guide to Car Transmissions

Why is the transmission important?

The transmission regulates how much power goes from the engine to the car's wheels. It shifts between differently sized gears in a similar way to a bicycle. This allows the car to more easily start moving from a stop, or pick up speed gradually.

How does it work?

If you have a manual transmission, you use the clutch to disconnect the engine from the gears completely. Then, you use the gear shift to line up a new gear before connecting it again.

An automatic transmission does the same thing, but instead of having direct control of the gears yourself, it’s governed by a computer and sensors that keep track of the torque being applied and adjust it as needed while you speed up and slow down.

What are some common transmission problems?

Your vehicle needs transmission fluid to cool and lubricate this system. Some engines use a separate reservoir of motor oil to do the same job.

A transmission fluid leak will leave a puddle of red liquid (or oil) on the ground. Driving your car with low transmission fluid will damage the engine because of the lack of lubrication.

Damaged gears or a worn-out clutch can make the transmission slip, rattle, and grind when shifting. Also, computer systems can prevent an automatic transmission from engaging correctly or shifting when needed. Because this equipment is complicated, you’ll need to take the car to an auto mechanic for transmission repair.

What maintenance does it need?

Depending on the car, you may need to have the transmission fluid changed and the system flushed by an auto repair professional every 30,000 to 100,000 miles. However, some newer cars are designed with a closed transmission system, which means they should go their whole life span without a transmission fluid change. Check the owner’s manual to see if your car is in this category.

For transmission repair and maintenance, choose Stapley's Garage. Serving Chandler, Gilbert, and Mesa, AZ, their technicians are ASE-certified, and they welcome everyone from high school students to customers who have been coming for decades. To make an appointment, call (480) 633-5505 or send a message online.